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How to Use an Airless Paint Sprayer

Airless paint sprayers come in many different configurations and designs but all have the same general features and controls. The basic idea behind how a sprayers works is that it pumps the paint and forces it out a very small tip on the spray gun. There is no air or air compressor involved, hence the name "airless" paint sprayer. They will apply a lot of paint very quickly and can make a tedious job very easy and quick.

Steps
  • Prepare the surface for painting. Cover any and all things that are not to be painted, including yourself. When spraying, there will be misting/fogging and this paint will end up everywhere. It has the same characteristics as fine sheetrock dust and will float and settle. Light synthetic coveralls should be worn along with spray hood, safty glasses and respirator.
    1. If painting inside, cover/mask floors, walls, light fixtures, doorknobs, hinges, light switches, etc.
    2. If painting outside, the paint you spray 15 or 20 feet up onto a second story can float and carry in the wind. Cover all landscaping, neighbors' house, fences, etc.
    • Always keep the spray gun pointed at the surface to be painted and keep it moving in a horizontal motion. Never spray without your hand in motion.
    • Start moving your hand, and then pull back the trigger to start painting.
    • Release the trigger and then stop motion of your hand to stop painting.
    • When you are finished painting, thoroughly clean the sprayer. All the paint must be cleaned out after each use.
    Tips
    • Never mix oil-based paint with water or latex paint and never mix paint thinner with latex paint.
    • Treat your airless sprayer like a gun. Be careful to keep children and untrained people away.
    • The tip where the paint comes out is extremely small and prone to clogging. Any small piece of dust or sand or dried paint will clog the spray tip. To help minimize this problem strain the paint whenever possible with a synthetic paint strainer (never use cheesecloth). When renting or buying a sprayer, always get one with a reversable tip installed. If you get a clog, this allows you to quickly reverse the spraytip, clear out the clog, reverse it back and proceed with painting.
    Warnings
    • Airless paint sprayers operate at very high pressures and can very easily cause injures if you were to spray your skin or any part of your body. You may actually inject paint into your tissues or bloodstream through your skin without having an obvious cut or bleeding. The skin can open up and allow the passage of the paint through and then close off again making it appear that nothing is wrong. This is a "fluid injection injury", and should be treated by a professional immediately.
    • Even when a sprayer is off and unplugged it can have pressure trapped in the machine until it has been released. Always make sure that each time you turn off the machine, you release the pressure in the system by opening the prime valve or by pulling the trigger on the spray gun and spraying into an empty bucket.
    • Airless Paint Sprayers are able to spray a wide variety of paint products but do not spray coatings with textures or grits.
    How to Use an Airless Sprayer

    For larger painting jobs, an airless sprayer is the most efficient way to apply paint. An airless sprayer uses an electrically run hydraulic pump to move paint from a bucket or container, through a tube, into a high-pressure hose, to a spray gun, and, finally, to the surface. Once you get the knack of it, an airless sprayer is easy to use, but if you rent one, make sure you get a set of written instructions.

    The instructions will tell you how to flush the system with solvent (usually water or mineral spirits, depending on the paint you'll be using) and how to pump the paint through the hose to the spray gun. For cleanup, the procedure is reversed: Pump the leftover paint out and flush with solvent.

    You'll only need the spray rig for a day or two, but plan to spend at least another day beforehand to thoroughly mask off everything you don't want to paint. Tape drop cloths to every floor surface. Drape windows, the fireplace, and doors. Remove all hardware or cover it with masking tape. Mask switches and outlets. Paint from a sprayer travels on the tiniest of air currents and settles a fine mist of overspray on just about every surface in a room.

    Plan to keep at least one window in each room open and set up an exhaust fan to draw paint vapor out of the room. Be sure, too, to wear a painters' mask, a hat, and old clothes with long sleeves to protect your arms.

    Airless sprayers are equipped with several filters to keep paint particles and foreign matter from clogging the spray tip, but it's a good idea to filter the paint yourself through a nylon stocking or paint filter before you pump the paint through the hose.
    Using an airless sprayer effectively takes some getting used to, so plan to practice on some scrap plywood or an inconspicuous part of the room or the house. The object is to cover the surface with a uniform coating of paint. Hold the spray gun a constant 6 to 12 inches from the surface and maintain this distance with each pass of the gun. Keep the gun precisely parallel to the wall. Don't sweep it back and forth or you'll end up with a wide arc of paint on the wall; the paint will be concentrated in the middle of the arc and almost transparent at each end.

    Paint about a 3-foot horizontal strip at one time, then release the trigger and drop down to paint another strip of the same length, overlapping the first strip by one-third to one-half. Once you've covered a 3-foot-wide area from the top of the wall to the bottom, go back to the top and start another 3-foot section adjacent to the first, overlapping the edge of the first painted area by several inches as you work your way down the wall again.

    Examine the painted areas to make sure the entire surface is receiving a uniform coat of paint. Too much will run or drip; too little will let the old paint show through. If you notice these flaws, it means you are not keeping the spray gun a uniform distance from the wall at all times or that you are tilting it. An upward tilt will deliver excess paint to the bottom of the painted strip. A downward tilt will concentrate paint at the top of the strip.

    To prevent paint buildup at the end of each strip, release the trigger on the gun a fraction of a second before the spray gun stops moving at the end of your stroke. When beginning a new strip, start moving the gun a fraction of a second before compressing the trigger. Always keep the gun moving when it's spraying.

    Be sure, too, that you've properly thinned the paint and adjusted the pressure control according to the manufacturer's instructions. If there is too much or too little thinner or too high or too low a pressure, the spray of paint won't atomize properly.


    Using an Airless Sprayer Safely

    Airless sprayers are fast and efficient because they supply pressures of up to 3,000 pounds per square inch. This force moves the paint at 100 to 200 miles an hour through the spray tip. All that power can be dangerous. Consequently, treat an airless sprayer with lots of respect, follow the manufacturer's instructions to the letter. Use the following precautions to prevent accident or injury:

    • Keep the spray gun's safety lock on when you're not painting.
    • Make sure the spray gun has a trigger guard and a safety shield around its tip.
    • If the spray tip becomes clogged, do not try to clear it by pressing your finger on it while the paint is being sprayed. Keep your fingers away from the tip when the sprayer is operating.
    • Never point the gun at anyone else or allow anyone to point it at you.
    • Always turn the sprayer off and disconnect it from its electrical source before you clean out the gun or the sprayer's filters. Even then, if you have to clean the tip, squeeze the trigger to release any built-up pressure in the hose.
    • Only work in a well-ventilated area, wear a painters' mask to avoid inhaling fumes, and don't smoke or work around open flames. If you're working outside, don't leave containers of solvents sitting in the hot sun; put them in the garage or another shady spot.
    • Never leave the sprayer within reach of children or pets.

    Airless Paint Sprayers
    An Excellent Way to Paint


    Airless paint sprayers are one of the best inventions of all time. Only the brush and roller can be considered more important.

    Airless sprayers can apply a wide range of coatings and finishes in less time than any other application method. Plus apply the coating at any thickness desired.
    Airless paint sprayer refers to a method of applying house paint at high pressure to atomize the paint. This method works by forcing the paint, or primer, through a small tip opening at very high pressure.


    Airless sprayers do not use compressed air.

    The basic components of the airless paint sprayer are a pump, hose, gun and tip.
    There are two pump types, piston and diaphragm. Both work very well. But the diaphragm type won’t be able to pump the very thick materials like a piston pump can.
    The most versatile airless paint sprayers are the piston pump types.

    • A piston pump has many components including a piston, packings, and check valves. The piston moves up creating a vacuum to suck up the paint into a chamber, the fluid section, and down to push the paint into a high-pressure hose.

      The packings create a seal to prevent pressure losses during operation. Professional airless sprayers use self-adjusting packings to prevent premature wear and the need for repairs.

    Check valves, or ball and seat valves, direct the flow of material from the fluid section of the pump to the hose. This prevents the paint from being pumped back through the pick-up tube.
    All piston pumps have these components in one form or another.

    • A diaphragm pump also uses a piston, but in a different way. The piston moves hydraulic fluid to move the diaphragm, which in turn sucks up the paint and then pushes it through the hose and gun.

    No moving parts touch the diaphragm. The movement of the piston and hydraulic fluid cause the diaphragm to move up and down very rapidly.
    There are no packings with this design, but check valves are still necessary.

    High-pressure hose is necessary for this application method.

    This hose is rated for the maximum output pressure of the pump; 3000 psi is the typical operating pressure.
    The attached fittings are ¼ inch and will work with most units. This is very tough hose that is kink resistant and capable of withstanding very high pressure.
    Never attempt to repair this hose as personal injury could result. It is best to replace than repair.
    Spray Gun

    The spray gun is a valve that is used to control the airless paint sprayer and hold the tip. With a handle and trigger it resembles a handgun.
    When the trigger is pulled the valve is opened and paint is allowed to travel to the tip and finally to the surface being painted.

    Comfort is a big factor in choosing the right spray gun.
    Manufactures produce 2 and 4 finger guns. The numbers, 2 or 4, refers to the amount of fingers needed to pull the trigger.
    I like the 2 finger airless spray guns for their comfort and balance. Choosing a spray tip is difficult and depends on the capabilities of your pump and the material being sprayed. This choice will affect the performance and effectiveness of your airless paint sprayer.
    These are the basic components of all airless paint sprayers. The type you choose to own will depend on your expectations and needs. Remember the thicker the material to be sprayed the more power you will need.


    Crowder Painting owns a variety of professional airless sprayers including,

    695 electric �C This is an excellent piston pump that is very powerful and capable of performing almost any paint spraying task.

    ED1150 electric diaphragm pump �C used for fine finish spraying and power rolling.

    390 electric piston pump �C this pump is at leased 10-12 years old and still going. Capable of fine finish spraying and painting the exterior of your home.

    390 gas piston pump �C another old pump that is used exclusively for exteriors and is powerful enough to pump light block fill or thick house paint.

     

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    * Reference:

    Dictionary for the Airless sprayer / machine / motor etc.

    Dictionary for the painting relative.

    Chinese Local Market: Yes, we sell our air less painting equipments into China domestic market also. our local domestic brand is PUTTER (Like the model number PT1800i, PT2200i, PT1900i, PT3500, PT2200L...), RASFN (SF818, SF838, SF825, SF827, SF829, GH200, GH700), and we have many many local distributors in China different provinces.

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