Tips for your gravity gun need for your projet

Question from our customer:

There is a one-person shop for furniture. I am thinking of ameliorating my ability to finishing as I made my furniture in that shop. In my earlier work, to sprout the little quantity of varnish that is used for automotive, use of coatings that are catalyzed and a little urethane, I used a gun called Binks HVLP which is an off-the-shelf gravity-feed. Now I would like to do some woodwork and I need a gun that is right for this purpose. Also, to do the scaling and managing the financial plan of my procedure, I would need a gun called Binks gravity gun. There are some guns in the market which are labeled HVLP and others are not marked. These all look very alike which makes it difficult to spot the difference. Is there anyone who can help me to learn the difference between these two? And also can someone give me information on the size of the suitable tips?

From contributor L:

Standard Gun VS HVLP:

If you want an improved spray technique at economical rates, use the standard siphon gun. It may affect efficiency. On the other hand, Binks HVLP is better for spraying paint on the surface. It might use increased air. The benefit of Binks HVLP is that the blowback and over-spraying will below. It might be more expensive than a standard gun but it will provide you with the fine size of the droplet. Binks HVLP gun is an absolute pick for me over a siphon gun if I need a better spray technique. I might be willing to use the standard gun for high pressure if over-spraying isn’t a problem.

From contributor F:

I had a Binks HVLP from PC that I used for the purpose of gravity alteration. I discarded it for a model that is for siphoning purposes with the turbine. I got it from Smith spray equipment. I experienced a huge difference in work due to this swap. The finishing was incredible as I sprayed the four windows and some doors. The issue of overspray was not much. I got zero drops on me. There were more on my hands when I relieved the can pressure while coating as compared to spraying.

From contributor J:

There are 2 guns that I use. Both of them are Binks HVLP. One gun is large in size. It is Binks HVLP. Another one is small in size called mini Binks. They both are replicates of SATA products. Finishing quality with both of these is remarkable if they operate with lacquers that are precut, Campbell. They also work well with automotive paints. They are very sensitive. Their sensitivity is associated with the size of tips versus viscidity and also to pressure of air (which helps reduce the size of the droplet) versus overspray.

I also have 2 air dryers. The first one has a filter that is a standard one. It has a jar which is for collecting purposes. This jar is about 30 feet after a hose. The second dryer is called a desiccant dryer. It has a valve for regulating the pressure. The airflow is enhanced and the drop of the pressure is not excessive at the gun’s tip because I use an id hose of about 3/8 and couplers of huge sizes. On the Star HVLP, I use the tip of 1.7 mm and on the mini HVLP, I use 1.0 0r 1.1 tips.

From contributor M:

There is a type of gun that uses a reduced amount of air as compared to old guns. This type is known as Binks HVLP, a high volume low-pressure gun. The transfer rate is also slow. It means that in a precise time, you place a small amount of material. But in Binks HVLP, the rate of efficiency of transfer is also better as compared to old guns. In the old guns, a large amount of material is placed on. For fluid atomization, they also require high pressure. The overspray of these is also higher as compared to Binks HVLP guns.

There is also another gun, LVLP. It is the same as the RP (reduced pressure) guns. They gave increased output as compared to Binks HVLP. Their rate of efficiency is also better than old guns but as good when compared to HVLP. For someone who wants more improved output than HVLP, this is the gun you should go for. It doesn’t give waste as much as the old ones.

The type of guns that I have been saying about our conversion type. They are not a turbine. These guns can be attached to a normal compressor. There are some compressors that are small in size and are portable. For these compressors, there are some guns that are specifically designed for them. Some of these guns can start even with a compressor of 2 hp. The spectacles that I need will get from your supplier. Then I’ll meet with someone who vends equipment. That will help you in getting a proper setup.

From contributor C:

The recommendation I make is to inspect the consumption on the gun. Some guns of HVLP type uses as low as 4cfm and some guns use as high as 12cfm. The same thing applies to siphon guns. You cannot do the comparison of a small gun of one type with the other gun type of large size. It’ll be like the comparison of apple and oranges. It totally depends on the model details. There are many great models of the Binks HVLP guns which use air very much. Some of them use 10 and 12cfm or more. Due to this reason, it is recommended by many manufacturers to use large hoses along their HVLPs.

From contributor G:

With the help of specific designing, the Binka HVLP guns consume almost 25cfm on some guns. It means that the gun can experience starvation by Home Depot compressor. It usually happens due to the loss of volume, especially the disconnect you are using are quick in nature and aren’t HVLP rated.

The positive aspect of Binka HVLP is that it can increase the transfer efficiency of up to 50% on some tools. 20-25% is at which the Siphon gun will be best and from which 10-15% is transferred efficiently. Transfer efficient is a little higher in HVLP than in old guns (guns that are not marked HVLP). HVLP is approved by the OSHA. It is also following all the codes by EPA, as long it is used for local factors. If the airline is less than 3/8, don’t ever use the HVLP. This act can cause starvation of the gun.

From contributor F:

The reason I stopped using the old gun and started using a turbine system is exactly this. The PC gun which I was using, was built well but needed a 9cfm. This 9cfm isn’t going to be supplied by the compressor. Also due to the fitting which was ¼”, I was in doubt that I will receive the HV part of it. So I bought a turbine instead of a compressor of a bigger size. This is because it’ll be a waste.

From the original questioner:

I’m positively looking for the conversion guns and not for the turbines. My goal is to find that type of gun that is handy with my compressor which is small in size. My model is driven by a belt and has a 2hp cast-iron. Now I understand that this model is not ideal.

Now here is a question that needs to be answered: What would happen if your gun doesn’t pair perfectly with the compressor? Would it be wrong to stop for 20 to 30 seconds from time to time so it would catch up? Are only certain models with certain finishing is acceptable for this? I asked this question because many of you work in the production area where top priority is the speed. My work is custom and unrepeatable. I also do finishing which takes very little time. I use a spray gun which slows my work by 20% which is really not an issue for me. I’m mainly concerned with the finishing quality and easy to use the instrument.

On another hand, I was reading about the Astro guns and saw some positive comments about it. Hypothetically I was looking at the model of HVLP which uses 10cfm at 41-44 psi and also at the model of LVLP gun which uses 7.8cfm at 40 psi. Does anyone have any views about this?

From contributor M:

To the original questioner: You are an owner of the one-person shop, is that right? I had no idea that you want to know about the reviews on 25cfm guns. There are some exemptions and I was talking in common terms.

If you are spraying on the pieces which are small in size then you can use a combination of a small compressor and a large gun. But if you use this combination with a piece of large size or a panel or cupboard, then steam may end before the completion. You may need various coats of spray if you are using a material that is solvent-based. You’ll also need to keep a wet corner. The product on which you are working may subject to flashing or can have a problem with the over-spraying if you’ll let the compressor catch up by stopping it for a minute. Years ago, with the combination of a gravity conversion gun and a small compressor, I shot the products which were water-based. It wasn’t a big issue back then. But now I think the rules have changed with the water-based product in the last 10 years.

When you have a conversation with a salesman, you must have a piece of information about the output of your compressor. You must tell him what product you will shot at. The salesman can help with the Binks needle, outlet and Anest Iwata air cap sizes if you have the knowledge of viscosity.

From contributor F:

Sometimes the motor of your compressor runs massively and its duty cycle may surpass due to a piece of large size. This happens when cfm is not formed enough by the compressor so it would sustain with the gun. Now consider the following example: the compressor which is a common PC 6-gallon pancake when used frequently with the nail gun gives almost 3cfm at 45psi. The duty cycle of this compressor is 50%. It means that the motor of the compressor mustn’t operate more than half the time in 1 hour. The conversion gun of PC HVLP needs 9cfm. When you are spraying the tank, low the pressure very fast. Due to this act, the compressor now has to operate continuously and this maintains the pressure up. Soon according to your wish, the gun pressure is below 45 psi. Now until the recharge of the tank is done, you have to stop. On another note, you might burn your motor if you do this process excessively.

This process of sparing the time so the motor will cooldown is infuriating. This time won’t be frustrating if you do something else. But doing this technique makes it quite difficult to get a large piece done. I might keep the motor working longer but it would be a risk. In the end, I bought a turbine unit. This purchase was worth it.

From contributor J:

I redid the wiring of an old compressor which was Sears 10 gallon to 220. I did this when I start to use HVLP. When I had a big job, I used the compressor which was of the same size as a compressor that is used for nail guns. I carried it on my back. It was also very economical as compared to a compressor of high capacity. If you place a house fan in that position where it is directed at the compressor it keeps the temperature low.

From contributor C:

The problem that often happens with the compressor is the Heat. It is very difficult to keep the water out of the compressor when it operates for a while. The air in this is hot. I have an Astro gun for this situation. It tweaks a lot of air at 44psi. But according to my personal experience, it works better at 30psi or maybe less. At this pressure, the compressor uses a reduced amount of air maybe half as much.

This gun is my favorite. Through DeVilbiss, you can purchase a bag adaptor kit for this gun. This will help you by closing the zip-lock bag that is present in the cup. It’s proven to be very nice. It performs the cleaning of the breeze and you can also spray both sides through it.

From the original questioner:

I’ll see the results of ITW Ransburg gun soon because I have ordered it. Is the DeVilbiss bag adaptor easily available in the market or is there a unique part number for its purchase?

From contributor C:

It is very easy to purchase. If you go to the internet and search spray gun world and explore their site by pressing the liner kit icon, you’ll see those bags. They are very economical. Their price is $20. Sears gives the 10 bags for $10. You can buy the kit as a bargain.

From the original questioner: There is a gun called Astro conversion (1.7 tips) which I like. The compressor which I have is 2hp. It is fixed to top out at 110 psi. The gun is ranked for when the regulator of the diaphragm is fixed at 41-44 psi. Due to this, before the compressor turns on I can widely spray for 30 seconds. By keeping the gun widely open, the pressure of the tank will be maintained at 95 psi for an indefinite period with the help of a compressor. When I’ll stop the spraying, the pressure backup will be built fully by the compressor and will be turned off for about 30 seconds. This setup is not perfect for the whole kitchens because it will be underpowered. It’ll be a good fit for small projects.

Is a gravity spray gun better than a suction spray gun (Bink, Sata, Anest Iwata)?


You have two choices for spraying guns being attached to the compressor. One is a Binks gravity spray gun that has the paint container on its top and a suction Binks spray gun where a paint container is attached below. The way spray is fed to the nozzle determines the difference between these two guns.

The name also says that gravity pulls paint or other material such as cellulose in the Binks spray gun and when one pulls the trigger atomization happens at a specific pressure. This finally fed paint to the nozzle. Compressed air is used by the Binks suction air gun to create a vacuum that siphons the paint from the container of paint into the spray gun. More compressed air is required by the Anest Iwata suction spray guns as compared to the Anest Iwata gravity spray gun. Personal preference will tell which is the better gun.

Usage of every paint drop in the container and lighter make the Sata gravity spray guns a better choice as compared to the Sata suction spray guns. They also do small spray jobs very easily. While Sata suction spray guns are more natural in use and can be used at specific angles as compared to the Sata gravity spray gun. Any gun you use must produce best and adequate results time after time. It should be compatible with the air compressor.

Binks Gravity Feed Spray Guns vs Binks Suction Feed Spray Guns (Sata and ANEST IWATA)

For feeding a Binks air spray feed gun gravity and suction are one among the three ways. They have benefits along with the disadvantages. We will cover both of them. If you want a comparison between these two types and Binks air spray gun as well you need to see this article:

Gravity feed spray guns

For coating smaller batches Anest Iwata gravity feed spray guns are used. They are easy to clean up and quick. Fine atomization is provided by them and is used for all types of spray guns including Anest Iwata LVMP, Anest Iwata HVLP or conventional. Flow should be by itself on the material is the main disadvantage of it. So heavy body coatings are not done using it. For best coating, it should move on till the end of the surface without thinner use. If you are adding excessive thinner than think of using a Binks pressure feed gun.

Advantages:

1. Easy cleaning

2. Affordable ( $400-$700)

3. Will help you achieve a very fine finish

4. Slower fluid amounts are delivered best for touch-ups and smaller projects

5. Disposable insert liner makes color change very quick and easy.

6. Good atomization control of air

Cons

-Smaller material amount

-Painters seem to dislike weight on the painting gun

-Fluid delivery control is limited

-Heavy bodied coatings are not sprayed well

Uses

-Automotive painting

-Wood finishings on the smaller projects like furniture pieces or individual cabinets

-High production facilities use it for color matching

-Touch up painting for metal fabrication

-Inserts e.g. decks are used for frequent color changes

SUCTION FEED SPRAY GUNS

Air which passes over the coating is used for drawing the material by the suction cup pickup tube and nozzle. It is easy to use. The method through which the gun uses to pick air automatically sets the high pressure. The only drawback is that you cannot control the atomization air pressure. The cost of this gun is the same as a Anest Iwata gravity-fed spray gun. The Anest Iwata suction fed spray gun is preferred as the material is below the gun and not above it. Quick color fix change is not allowed by using these Anest Iwata suction feed spray guns.

Pros

-Affordable

-User-friendly

-Comfortable than the gravity fed spray guns

-Unique finishing effects are achieved by using these guns and adhesives are used for special coatings

Disadvantages

-Heavy bodied coatings difficulty

-Not easy color changes procedure

-Due to large fluid nozzles, the fine finish is not achieved

-Atomization control is less as compared to the gravity-fed spray gun.

This gun is used in the following situations:

-For low viscosity coatings and adhesives applications

-With small batches, longer paint times are critical and finish quality is not an issue. 

Binks Gravity Feed vs Conventional (Siphon) Feed Spray Guns (valid Sata, ITW Ransburg)

You have a choice between gravity feed and conventional feed while selecting a Binks spray gun. It is not ok to call the conventional feed spray gun as ‘siphon-feed’ because it has a specific meaning. Many technicians use this for determining ‘cup on the bottom’. Difference between siphon feed and gravity feed gun is described in this article:

Gravity & Siphon Feed Spray Guns: A Brief History

In auto repair body conventional feed guns are widely used. Before the Binks HVLP launch, conventional feed spray guns are termed as siphon-feed. Devilbiss is one of the oldest and trusted brands for siphon-feed guns. Gravity great feed guns are also made by them.

 Conventional feed spray guns become old and gravity feed spray guns became popular in the 1980s. Binks HVLP introduction for being environmentally friendly has made them a painters choice and gravity feed a very natural choice.

Fluid Atomization: The Big Difference in Sata Spray Guns

Atomization of a fluid is also a difference between these two Sata guns. When the paint leaves the Sata fluid nozzle it is known as atomization.

Two passageways are present in Sata spray gun: one for the air and the other is for fluid. Vacuum formation at the fluid passage by air rushing is the achievement of atomization. Air mix with fluid and mist is ejected from the nozzle.

Paint has to be drawn from below the gun or is fed from the top down into the nozzle for achieving sufficient atomization. Greater air pressure in the Sata siphon-feed guns is the main restriction in using Sata HVLP systems. It is difficult to keep air pressure low and adequate vacuum. Lower air pressure is achieved by pressurizing the cup for all those users who prefer Sata feed spray guns. The fluid is forced to the feed tube by the siphon process. The pressurized cup is identified by air presence from the air supply of the cup.

If you want more information regarding air pressure to paint guns to take a look at our article regarding it.

 Advantages of Binks Gravity Feed Spray Guns

Following are advantages of Binks gravity feed spray guns as compared to conventional spray guns:

1. Low air pressure

Siphon feed design limitations are reduced by gravity feed as less air is required for paint atomization. It makes the spray gun more efficient.

Less overspray means more control

When you spray with less air pressure it means less waste, overspray, and waste for the painter.

  • Easy cleaning

Cup is on the top of the gun which makes cleaning very easy.

3.Quality paint

The efficiency of the gun is discussed here. As these guns are more efficient as compared to the traditional counterparts it results in better finishes.

4.Versatile

Clear coats are also done by it.

This is the reason why painters are switching from conventional guns to the gravity feed guns throughout the year.

Advantages of Siphon Feed Spray Guns

These guns have no longer any advantages as compared to their past. Still auto refinishes industry has a special place.

For specialized and thinner coatings this is a good gun. The splatter effect is done in a very good way by these guns. For metallic paints and pigments, these guns work best.

These paints are easier to spray. It has a conventional and user-friendly design for easy spraying. Old school painters still prefer this gun.

Conclusion

Gravity feed gun is a very good choice due to its efficient and versatile design. Still, Sata HVLP is a basic need in many guns abut even if this technology is not in use gravity feed guns require low air pressure. If you are using traditional Sata spray guns then you would like a siphon spray feed gun.

In the market for new spray guns shop the nest sellers mentioned below and make sure you check other items by browsing our website. It has all the stuff for high-quality paint. Are you facing issues with the current paint gun?

BINKS & SATA PAINT SPRAY GUN TIPS AND TECHNIQUES

If you know more about the Binks paint spray gun you will perform it better. We will talk in detail about how a spray gun is used. It will tell you how to aim, move and adjust it for obtaining different results. Even if you use these Binks spray guns differently you will achieve the same result.

Gun distance or speed is easily compensated by air pressure changes.

Techniques in the gun lead can huge differences in throughput and transfer efficiency.

Spray heads and guns are the same. These guns are handheld. Moving holders are used for mounting heads like chain-on-edge or a reciprocator (or a robot). Now go to faqs on the Binks spray guns.

What is the purpose of a Devilbiss paint spray gun?

Break these droplets into tiny parts and direct all these parts for coating. The highest possible transfer efficiency is delivered by the guns (%age for sprayed paints which reach the part).

How many kinds of Devilbiss spray guns are there?

There are several kinds of Devilbiss spray guns present. Airless, conventional, HVLP guns and air-assisted airless are commonly used. Conventional spray guns are of pressure, suction-feed type and gravity. Electrostatic guns are also available. Gravity guns and suction feed are not for production work as they rarely can hold more than one quarter.

How is paint usually supplied to a gun?

Following are techniques for getting the paint to a gun:

1. Pressure feed: In this way, paint is pumped to the gun. Mostly these guns are used for production work.

2. Suction or syphon feed. Cup guns use these techniques. These equipment are simple but the paint-holding capacity of the gun is limited to the cup size. It is more than one quarter.

3. Gravity feed Paint normally flows by gravity to the gun. For delivering the paint no external air is used. Some HVLP guns use air pressure for enhancing paint delivery.

Are the various types of guns used differently?

Some differences are present. Gun speed and the recommended distance from the gun to the part are the most important ones. Different gun manufacturers recommend distances like shown:

Typical gun-to-work distances for paint spray guns:

Binks Conventional Spray — 6-8 inches

Airless — 12-14 inches

Binks HVLP — 8-10 inches

ITW Electrostatic — 10-12 inches (see Note)

One inch of distance per thousand volts is required on the electrostatic gun.

Operator preference is usually used to describe gun speed. HVLP guns need faster movement to avoid flooding.

Why are there different types of guns? Each of them has advantages in using them.

Yes, you are right as every gun has its advantages and disadvantages.

Pros and cons of each gun type

This is a common question and the answer is given in the following table.

What about the ITW Ransburg electrostatic guns? They are not listed in the table

Because all guns mentioned above can be used as electrostatic units. These guns always use a grounded part to attract electrically charged paints. It results in high efficiency. Paint usage can drop fro 20-50 percent which depends on the voltage, humidity and especially shape of the part.

Then we use Binks non-electrostatic guns?

Because somewhere these parts are conductive and not very complex in shape. For some systems, these plastics are not electrostatic enough. According to a Friday cage effect, the electric field between the gun and the part does not penetrate the corners. So complex shapes are hard for coating. Electrostatic equipment when compared with traditional stuff is more difficult to maintain. A low volume of shops does not justify the extra costs. For an electrostatic system to work its increased transfer efficiency should be considered.

How can I know I have the best Binks gun?

Check the manual as it comes with every gun. If it’s not readily available in your shop to make sure it is present. Find it and read it.

What is written in it?

It addresses the following stuff:

1. Spraying at the lowest pressure

2. Maintaining a consistent distance

3. Your gun should be perpendicular to the work

4. Each pass is overlapped by 50%

5. Each pass gun should be triggered.

6. Maintain your gun properly

What is sprayer high pressure? My sprayers love it

They only love it because they don’t buy the paint themselves or clean their mess. High air pressure makes the paint droplets too small. The solvent is lost by them very easily and they don’t flow-out well on the part. Blowing is also a very serious problem in this case. Many among them miss this part or blow off. This means more expense, maintenance, and mess.

What should be the air pressure?

Following factors will determine it:

1. Viscosity

2. Solvent blend

3. Temperature

4. Distance to the part

Pressure can be too high or too low. The fan shape is achieved with high air pressure. It’s also thin in the middle. High atomization gives too large vapors which can lead to sagging.

How to check droplet size?

Trigger the gun and pass it quickly over the non-porous surface like a metal or glass piece. While moving the gun you can see individual droplets. 

How to check the air pressure?

Start with the lowest pressure and then increase it like a 5-pound step. After each increase check the droplet size. Droplets will become smaller and more uniform. A saturation point will be reached where an additional 5 pounds won’t affect the droplet size but will change the nearby droplets. Do not go on further but even drop the pounds 3-5. If you need more or less air pressure then adjust the fluid flow.

Why is gun-to-part is important?

It plays a role in thickness and wetness. If your gun is too close to the work the surface can be flooded and sags or pops can result. Being far away means your film is too thin or thick. Dry spraying, orange peel or poor hiding can result.

Why are right angles staying is necessary?

Because if you fan your gun from left to right or heel it up and down. The result will be a great variation in the gun-to part distance. Droplets going on higher distance will dry out more and thin out. Unequal wet films will also result from it.

Some areas will be sag or contain the wrong glass. Colors will also change.

My parts are complicated and staying perpendicular to it is very difficult. What should I do?

Do what suits you more. Just do the best you can do. Good sprays also work wonder if you know the conditions and have enough time.

Why should I overlap each pass by 50 percent?

For achieving the fine film band. You can overlap over the one part to another number like one-third or one-fourth. This result will be a uniform firm build. You just don’t overlap by one over 2.5 or any other fraction which includes a non-whole number. If you do these results will be uneven thick regions of the film. It is unnecessary but half and last past are just air coating. If you don’t coat air with a half width of fan the other half width will not be coated. Also, your dry film will be too along with the film.

What does gun triggering mean?

At each stroke triggering means stop spraying.

Why the gun should be triggered?

For reducing mess, saving paint and avoiding excessive film build. If you didn’t trigger then carry this part off the gun and also back pass over it for the next pass. Must pass the trigger gun over the part and then back over it for the very next pass. Or you must have triggered a gun directly in the next pass while you aim for it. If you carry the triggered partway off the gun too much paint is used. By using this step next pass builds wet films at each end stroke. It can result in too high gloss, sags or both of them.

We never heard of triggering. From where this idea come from?

From common sense and gun instruction manual. Most paint shops don’t have a sprayer unless he/she triggers. It becomes automatic. Experienced learners can do it.

Automatic equipment also triggers. Right?

Yes, absolutely.

What is done for maintaining the gun properly?

The manufacturer’s instructions are followed. Of course, you need the manual. Wipe air cap off now and with a solvent rag. For cleaning inside passages use a gun cleaner. Lubricate gun with the manufacturer’s recommendations. Atomization patterns should be checked once or twice a day.

What is the atomization pattern? How you can check it?

The paint fan shape is the atomization pattern. It needs to be round and have a uniform distribution of paint droplets. It is done when you trigger the gun at the non-porous surface. By holding the gun in an oval position you can check the droplet uniformity distribution.

Do all these comments apply to both electrostatic and airless spray?

Yes but with some additional comments as well.

Then what are they?

The electrostatic spray has 3 additional stuff for considering:

1. Faraday cages

2. Humidity

3. Grounding

Operators must be grounded when you are applying the electrostatic charge so that it can complete its circuit. It doesn’t mean that the ground needs to be very good. Five hundred thousand ohms or less is better.

Wow, it seems a lot of resistance. Is it worth it?

It’s only when you consider less than 100 microamps or 100,000 volts are involved. Ohm’s law clearly states that such a high voltage can push this small current through a magnitude.

Can I measure this resistance with my ohmmeter?

No, as very low currents are involved so need a manometer. One of them consists of a 500-volt battery.

Why is it important to ground the operator?

This operator is not becoming charged. It is an efficient-charging device. The electric charge is sent to every nearby conductor. The operator is nearby and can store electricity in his body. Booth ground can also store electricity. If your operator becomes charged an arc can be created for the charging. Arcs act as a fire hazard.

How grounding the operator help?

In this way, electricity is not gathered in a conducive place. It is conducted away from the ground. This does not affect the operator. The person cannot feel it and avoid a charge from accumulating on the paper and can result in an arc if the operator approaches the ground.

How do you operate?

By wearing conductive shoes and maintaining skin contact with the gun. The power cable is used to ground the gun.

What are the Faraday’s cages?

It is any recess that shows that the electric field doesn’t penetrate. Deeper recesses are wide and cause trouble. Recesses field don’t go into the recess. It curves sideways to get the grounded part as quickly as possible.

What can be done if the part has troublesome recesses?

Voltage experimenting.

The field is forced by turning it into a recess. If the voltage is high spark can occur between the gun electrode and the part. We don’t want sparks around the paint booth. Fire can result. Turning the voltage down can also help. Paint droplets momentum allows it to break from electric field-free and move in a straight line toward the path and a recess. Some guns also have a power switch on and off for operating it easily.

What is the problem with humidity and electrostatic spray?

High humidity in the air allows electric charge to leak off from the points before they reach a point. It is considered an inefficiency but nit any danger. Wraparound is lost in this way and your efficiency goes down.

How to overcome a high humidity problem?

Sometimes voltage turning high is also useful. Dehumidifying the booth can help.

How high should be humidity?

It is according to the paint formulation. Ask your paint supplier for the guidance.

What is different about airless spray?

Mostly safety differences are present. High paint pressures are used by airless guns. 3500 PSI pressure is the excess one. These lower pressures can cause cut in the skin. Solvent and pigment become embedded in the body and also cause poisoning problems. Simple cutting can also occur.

So, what can be done to reduce the hazards?

Following three steps must be a routine practice:

1. Don’t point the gun at another person

2. Safety tips should not be removed with the gun. Tip prevent gun contact with the tip and skin. This is a safety pressure.

3. A safety lock should be used when the gun is not in use.Are you solving an issue regarding gun techniques? Contact us.

Understanding Conventional & Binks HVLP Spray Guns Technical Bulletin (valid for Sata & DEVILBISS)

What are the components of a pressure feed system?

Binks Pressure feed system consists of the following components:

1. A Binks pressure feed tank

2. Binks Cup or pump

3. Binks Air filter

4. Appropriate diameter and length of air and fluid.

5. Binks Adequate air compressor

What happens when the trigger is pulled?

The trigger only operates in two stages:

1. The initial trigger movement opens the air valve which allows the air atomization for flowing through the Binks gun.

2. If you further move the trigger it opens the Binks fluid needle. It will allow the fluid material to flow. After the trigger is stopped the fluid flow also stops. It happens before the automization of airflow.

This trigger operation assures the full spray pattern when the fluid flow starts. The full pattern is assured until the fluid flow is stopped. In this way no coarse atomization full pattern until the fluid stop.

How is the pressure feed gun adjusted for spraying?

For achieving maximum pattern size open spreader valve is used.

For achieving maximum needle travel achievement fluid adjustment in the counterclockwise direction is used. Internal spring tension is reduced once you open beyond that point. Leakage at the fluid tip will happen.

How is the Binks pressure feed gun balanced for spraying?

1. Set the fluid pressure at 5 to 10 Psiusing the control knob on the fluid regulator.

2. Air atomization pressure is set at 30-35 PSI. This is done using the control knob on-air regulator.

3. Test pattern on the piece of paper, wood or cardboard. Also, check the finish quality so that uniform coating is achieved. Particle size is too large or if too much texture is present in the finish then turn on the atomization pressure up to 3-5 PSI. Do it unless the size and texture of finishes acceptable.

4. Spray only a part with these settings. If the pressure is not suitable for the production rate or if the finish is starved to death for material then increase the fluid pressure. Regulator build knob in 2 to 4 psi is achieved until you achieve the wet coverage.

5. If you are using an ‘Air cap test kit’ so verify that air cap pressure is above 10 Psi if you require it by the regulatory agency.

What is an external mix gun?

Air cap is used for mixing and atomizing air. This is done by the Binks gun. For the application of all types of materials and is desirable when spraying fast. It includes paints such as lacquer. A higher quality finish is required.

What is an internal mix cap?

Air and material inside the air cap are mixed using this gun. It is done before expelling them. In case of low air pressures and volume or where the slow drying materials are sprayed.

Spraying flat wall paint or outside house paint with a small compressor is the typical example. Internal mixtures guns are rarely used for finishing. When a high-quality finish is required.

What is HVLP?

HVLP or high volume/low pressure use a very high volume of air. It is typically between 15-26 CFM which is delivered low pressure. It is used to atomize paint into the soft and low-velocity pattern of particles. Less than 10 psi is now needed for atomization.

Proper setup only utilized the standard pressure and fluid for producing the quality and a flow rate. It will meet production requirements.

As a result, very less material is lost in bouncing-back, over-spraying and backflow as compared to the conventional air spray. In this way, Binks HVLP delivers a high transfer with efficiency than the Binks spray systems which use high atomizing pressure.

 It resembles an Binks HVLP spray gun in shape and size. High inlet pressure models (20-80 psi) and convert to the low pressure internally. These are called HVLP conversion guns.

HVLP models like the turbines for generating air bleed it continuously to minimize the backpressure. It is against the flow of the turbine.

Binks Standard spray gun design is similar to the air cap design. It has a different variety of air jets for atomizing the air into the fluid stream. It atomizes this after leaving the system.

It is becoming very famous and many applications require it for their environmental-friendly use.

Low to medium solid materials are used by HVLP. It can be atomized by the gun which includes two-component paints, stains, primers, enamels, and lacquers, etc.

Cartridges in these respirators remove only solid particles from the air. They cannot remove vapors.

For preliminary functions like grinding, buffing and sanding these are effective.

Before using the respirators read in detail about all the instructions and precautions given by the manufacturers. For isocyanates, asbestos, ammonia, pesticides, etc.these respirators are not good.

Air Compressors

Air is supplied at high pressure and elevated volume for all air tools, sanders and Binks sprays guns. The compressor compresses the air in equipment and is a very major component in a spray painting system. This chapter will tell you about these systems in detail.

Volume supplied per unit of time is used for compressed air measurement. This is cubic feet per minute or CFM. It is given at a specific pressure known as delivery. Free air delivery or zero pressure by a compressor is known as displacement.

What is an air compressor? 

Binks Air compressor is a machine that is used to raise the pressure from the normal value to some high value. It is measured in pounds per square inch (PSI). Normal atmospheric pressure is 14.7 pounds per square inch a compressor will deliver air pressure up to 175 psi. When you are selecting a compressor the motor hose power should be Four times equal to powered 2 stages industrial air compressor. (CFM=4XHP)

What types of compressors are most common in spray finishing operations? 

Piston-type and rotary screw design are two types of compressors. Commercial spray finishing operation consumes a large amount of compressed air so piston-type compressors are mostly used.

What is the function of the air cap?

The air cap directs the compressed air directly into the stream of fluids for atomizing it and thus form the spray pattern. There are many different styles of caps for producing shapes and sizes for applications.

What are the advantages of the multiple jet cap?

More viscous materials are designed by the atomization of more viscous materials.

Higher atomization pressure allows on more viscous materials with very less danger for split spray pattern.

Due to better equalization of air volume, greater uniformity from the cap is provided. Materials with low pressure also provide better atomization. They are sprayed with low pressures.

How should an air cap be selected?

1. Viscosity, type, and material used for spraying

2. Nature or surface of the object on which spray is done. Larger orifice of objects increases the atomization ability. With low orifice smaller spray patterns and deliver less material. These caps are used for smaller objects and fast speed.

3. Material feed speed

4. Fluid tip size to use.

5. Air volume in cubic feet per minute (CFM) and pressure in pounds per square inch (PSI) available.

What is the function of the fluid tip and needle?

They only direct and restrict the airflow of the materials which is directed from the gun into the air stream.

For a Binks tapered fluid needle, it forms an internal seat. It reduces the material flow when it closes.

Different types of fluid tips are available which handle proper materials. Various types, viscosity, and flow rates are used.

What is the nozzle combination?

air cap, fluid tip, needle, and baffle are considered as one unit. They all work together in harmony to produce a quality of finish and spray pattern. These together are known as the nozzle combination.

How are Binks nozzle combinations selected?

Five tips are used for selecting the nozzle combination:

1. Material type and viscosity

2. Size of object

3. Finish quality

4. Model of the gun being used.

5. Air volume and pressure from the compressor being used.

Viscosity and type is the first thing to consider. If you have the lower material viscosity then smaller is the I.D. of the tip.

Object size should also be checked. The largest spray pattern should be used. Also, remember that different air caps deliver various characteristics. Spraying time and the number of guns is reduced.

Nozzle combinations evaluation is the speed that will finish the application and achieve the desired quality.

For the speed and uniform coverage nozzle combination with different pattern produce as wide as possible.

Quality is the deciding factor to finish coat work is considered. The Binks nozzle of smaller patterns and speed should be chosen for the fine work. In this way, you can get greater application control.

The model of the gun itself will also limit the selection of the nozzle combination. Material discharged in a pressure feed gun following factors are kept in mind:

1. Material viscosity

2. Inside diameter of the fluid tip

3. Length and size of hose

4. Pressure on the Binks material container or pump.

If the fluid tip is too small then the stream of paint will be too high. In case of too large fluid tip opening the material discharging from the gun cannot be controlled.

The last point is the available air supply for considering.

Binks Air caps of pressure feeds consume between 7.0 and 26.0 CFM. It depends on the air pressure being applied. If you have a less air supply then the atomization and its discharge will be compromised. It will result in a poor finish.

What are the criteria for selecting a pressure Binks feed nozzle?

Fluid discharge in ounces per minute is very stable(It is determined by atmospheric pressure). Fluid tip inside diameter and paint container pressure determine the fluid discharge. If the opening is large more fluid will be discharged at a given pressure.

If the fluid tip is very small then the velocity of discharge will be very high. Then the air will not be able to atomize the air cap properly because of the heavy-center pattern.

If a fluid tip is too large the discharge volume will be lost too much and result in a split pattern.

Air cap and the fluid tip should match with each other and the job at the hand. Binks Spray gun catalogs have charts for the proper matching.

For efficiency matching and quality control, viscosity control is a very important point.

What is the spreader adjustment valve?

It is a valve for controlling the air into the horn holes which regulate the spray pattern. It is transferred from the maximum width.

What is the Binks fluid needle adjustment?

This will control the flow of fluid through the Binks needle. In this, less or more fluid will travel through the fluid tip.

Fluid pressure is varied by the pressure feed system and the pressure rate is varied using it. For temporary or minor flow control fluid adjustment knob is used. Fluid needle and tip will be extended by using it.

How should the Binks spray gun be held?

The pattern should be perpendicular to all the surfaces.

12-18 inches for the conventional air spray guns or 8-12 inches for Binks HVLP guns from the surface you sprayed.

What is the proper technique for Binks spray gun stroke and triggering?

Stroke is made from the free arm motion which will keep the gun at a right angle from all the points of the stroke.

Edge of the surface lining should be triggered for the correct spraying by the gun nozzle. The gun should be fully depressed while holding it. Guns should be in one continuous motion until you reach the other end of the object.

After releasing the trigger motion of the fluid is cut-off and reverse motion continues for some time. When you reach the end of the sprayed object trigger is depressed and motion continues across the object.

Each stroke lap pass before the first one. Very few overlaps result in the streaks on a finished surface.

Move gun at a constant speed until the liquid flows at a stable rate.

Feathering is another technique to be used. The partial trigger level is applied in this case and will allow the operator to limit the flow.

What happens when the gun is arced?

When you are a stroke it results in uneven application and over-use of spray at each end of the stroke.

If you make a 45-degree angle is arced from the tip 60% of the spray material is lost.

What is the proper spraying sequence and technique for finishing applications?

Corners and edges should be sprayed first as they are difficult areas. Always aim at the area directly so the spray is equally divided at both sides.

Hold gun closer as compared to before. You can also adjustment controller in a few turns.

Feathering technique should be used for the needle. It will reduce the pattern size.

If you hold gun close you have to stroke at a faster rate for compensating. The normal amount to be sprayed on the small space is compensated.

Gun angle should be 90 degrees when you are spraying at the curved surfaces. Always follow the curve. This is the better advice of applying for the smooth and best finish.

Overlap areas should be avoided for the streaking issue.

When you paint the narrow surfaces use the smaller cap and gun for avoiding the full-size gun.

In packed areas use smaller guns.

For proper triggering a full-size gun and air pressure is used. Fluid delivery is triggered by it.

Hoses and connections

Different types of hoses which use to carry fluid material and compensated air are the very main parts of a system.

If you select improper hoses it can be a problem.

Following are two types of hoses:

1. Air hose: It is used for transferring the compressed air from the source to the gun.

2. Find hose: These are used in the pressure feed systems for transferring material from container to the gun.

What sizes of Sata air hose are recommended?

Sata Pressure tank hose from compressor should be 3/8″ – 1/2” ID.

The hose from the gun to the Sata pressure tank regulator should be of 3/8″ –1/2” ID.

Tools for larger air require larger I.D. or shorter hoses.

What is the pressure drop?

Air pressure loss is due to friction between air source and its use. When air travels through the Sata hose air space is created. Pressure, energy, and volume are lost during this process.

How can this pressure drop be determined?

Drop-in Pressure is not a significant point with a short length of hose and at low pressure. When pressure is increased and straighten the hose pressure is dropped and should be adjusted.

Sata Air hose is subjected to the loss or drop in pressure.

Like 1/4’pressure drop is 1 Psi per foot and for 5/16″ is 1/2 psi per foot. This loss in pressure is due to the poor atomization.

Sometimes a tool is not functioning well and an undersized ID hose is the main cause.

Following minimum is recommended for the optimum Sata spray gun results:

up to 20 ft – 3/8″ I.D. and over 20 ft – up to 25 ft.- 1/2″ I.D.

For the performance of the system following points should be kept in mind:

1. Volume control

2. Pressure and cleanliness of air entering the Sata gun

For decreasing your contamination risks some key installation principles must be followed. The right side of the air compressor should be used for the proper application. The overworked Sata air compressors can produce a significant amount of dirt and oil.

Proper piping is important which helps to prevent condensation forming within the line and contaminate the air supply.

What is air control equipment?

It is the piece of equipment installed between air space and point of use for modifying the nature of the air stream.

Why is air control equipment necessary?

In spray finishing, raw air is piped directly from the air source to a Sata spray gun. Small but harmful quantities of oil, dirt, water, and contaminants which will alter the spray finish quality.

During this job pressure and volume will vary in the raw air.

For running the various equipment pieces there are many compressed air outlets. Air control equipment performs one or more of these functions installed in the device of the airline.

What are the types of air control equipment?

Air control equipment comes in different types and varieties. Most of them perform one or more of the following functions:

1. Air filtering/cleaning, 

2. Air pressure regulation/indication and 

3. Air distribution through multiple outlets.

What is a Sata air regulator?

The main airline pressure is reduced by this device from the Sata compressor. It is used for maintaining the air pressure with very less minimum fluctuation.

In air filtration device regulators are used in the line.

A great range of CFM and PSI capacities are available for air regulation. It can be used for with or without Sata air gauges. Different accuracy and sensitivity are available.

They include mainline air inlets and also include regulated or non-regulated air outlets.

What causes excessive pressure drop on the mainline gauge of the filter/regulator?

1. Partially opened valves

2. Leakage in airlines or fittings

3. Non-functioning of compressor

4. Too small compressor for delivering the required volume and pressure

5. Partially opened valves

6. The airline is very small for the air volume required.

7. Connector valves restrict the airflow.

Respirators

overspray, hazardous vapors, and toxic fumes are created by certain spray finishing. In ideal conditions, it is also good and no need to avoid it. Some type of breathing apparatus or respirator should be used spray finishing operation.

What is a Sata respirator?

A Sata respirator is a mask that we wore over the mouth and nose for preventing inhalation of overspray fumes and vapor.

Why is a respirator necessary?

It is necessary for two reasons:

For some type of respiratory protection required by OSHA/NIOSH regulations. Secondly even it is not required one has a common sense that inhaling over spraying is not a good and healthy option.

Paint pigments, harmful dust, and vapor are present in the overspray. If you expose any of these chemicals this is very harmful. The respirator can remove some or all of these chemicals from an air spray.

What types of respirators are used by spray finishing operators?

Following are three main types of spray finishing operators:

1. The air-supplied respirator, 

2. The organic vapor respirator and 

3. The Sata dust respirator.

What is a dust respirator and where is it used?

For spray finishing, dust respirators are used but are unsatisfactory most of the time.

How To Set your Binks Spray Gun Air Pressure – Day 5 Boot Camp (Sata, DEVILBISS, ITW ITW RANSBURG)

Want a Killer Paint Job? Then Pay Attention To your Binks Spray Gun Air Pressure

In this post, I will tell you about the correct Binks spray gun air pressure along with HVLP.LVLP, spray guns and compressors.

Air pressure doesn’t refer to air cap pressure but Binks air pressure gun at the spray gun dial neck and only when the trigger is pulled.

Binks HVLP Air Pressure Setting for Base Coat Clear Coat (High Volume Low Pressure)

When spraying base coat clear spray it at the 26-29 PSI. This is measured by pulling the trigger and letting the airflow through the tip of your Binks gun. In this case, your dial will say the reading of 26-29 PSI.

For better flow and atomization 2-3 PSI pressure is suitable. 28029 is the best spot.

 Basically, Binks HVLP spray guns mostly require 10-14 scfm at 40 psi. (Volume of air pressure per cubic foot). Pressure)

(LVLP) Air Pressure Setting (Low Volume Low

10-15 PSI when the trigger is pulled is best to set your gun.

Mostly I spray at 17 PSI when doing the spraying base and 20-25 for clear coat. Vey low spray guns are used in it. I usually do these things because I have many Binks air guns for spraying purposes.

The normal consumption of scfm is around 5-7 and 40 PSI volume of air is used.

What Size Air Compressor Do You Need To Set Up Shop?

Air compressor rating is the main thing while shopping for them. Today ratings of air compressors are very inflated which means rating number should be checked by you under the load. This is the horsepower rating. The number on the big box or sticker is just a lie and don’t pay attention to it.

Following is the big lie on the air compressor ratings.

Small DIY Application Air compressors

20-35 gallons of air tank which push 1.5-2.0 horsepower under load is a great setup or in the home garage.

Binks LVLP spray gun will be best for a motorcycle or small car painting. Condensation is a point of concern but it also happens in bigger tanks. Water filters in your setup make it a good preparation point.

The first one should be 10-15 feet from the air compressors and the second one at your gun neck for keeping the water out of lines. You will know best about the small $5 air fillers for threading on the air inlet.

There selling is done at our Binks spray gun store. Also, check Warwick spray gun if you visit. They are of great quality and affordable.

When using a small compressor 110-volt outbox is probably used. Irs maximum power is 2HP without breaking your volt line.

For Hard-Core Hobby and PRO Use Air Compressors

An air gallon of 60-100 is used with a rating power of 4-6 HP. For shops and garages, 60-80 gallons is the most popular one.

240 VAC wiring system is used like the one in-home dryer central AC outlet or mostly a larger 3 phase system.

New Binks spray guns are introduced. This is gaining a lot of popularity. With its German and Japanese craft style, it is gaining very much popularity.

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