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What it means |
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Refers to spray equipment which uses high pressure, rather than
air, to atomize coating materials for spray-on application.
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Normally a piece of equipment containing a high pressure pump powered
by gas, electricity or gas-hydraulic for spraying liquid materials and coatings onto
a surface. Shop Airless Sprayers
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When a liquid is broken apart into minute particles or fine spray.
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When the paint spray fan reaches the end of a surface, such as an
outside corner, and the fan continues beyond the surface, paint is "blown-by" the
target surface in a cloud of droplets
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when the painter directs the airless spray fan at the surface, sometimes
the droplets will rebound from the surface. This is the result of excessive pressure
and excessive velocity beyond the amount needed to atomize the coating.
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A trademarked name of a patented pressure actuated valve made by
Graco that shuts of the paint supply to the spay tip that is on an extension pole
to keep "spitting" from happening after releasing the trigger.
Purchase CleanShot Valve
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This is the area in time between pulling the trigger on the spray
gun and the pump staring to pump again. Most mechanical pressure controls allow about
a 300 psi drop in pressure before turning the pump on. Graco's SmartControl is an
electronic pressure control that reduces this pressure drop to about 50psi. The second
generation, Smart Control 2.0, reduces this even further to a near zero dead band.
The dead-band results in a fading spray fan followed
by a burst to the full, set pressure. The dead-band is more noticeable when spraying
thinner materials and/or at lower pressures. The EPC gives a more consistent and even
fan pattern and eliminates a few moving parts which can result in less long-term maintenance
costs.
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A pump design that uses a circular or oblong flexible synthetic
membrane, sealed at its outer edges and connected in its middle to a reciprocating
rod (or motor rod) or pulsating hydraulic fluid. As the membrane moves in response
to the rod or hydraulic fluid, fluid is loaded and dispensed through the check valves.
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A pressure regulation device that uses electronic components, rather
than electric or mechanical components, to provide precise pressure regulation.
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This is the spray itself, the shape of the spray.
Also See: Spray Pattern
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The spray fan size is normally measured top-to-bottom and 12" from
the surface being sprayed. The fourth digit in a Graco spray tip part number is usually
the one that determines fan size when multiplied by 2, example; a LTX413 tip would
have an 8" fan.
See Also; Tip Sizes, Tip
Sizing, Tips on Tips
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Refers to clear and gloss finishes such as lacquer or polyurethane
on cabinets, banisters, furniture etc.
More about Fine Finish tips
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A specially designed tip for better atomization at low pressures.
Graco's RAC X Fine Finish SwitchTips have a pre-orifice for finer atomization.
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Acronym for Gallons Per Minute
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The ball portion of the inlet valve of the fluid section of an airless
sprayer that acts as a check valve when suctioning paint. Normally on the lower /
bottom end.
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The tube that goes into the material to be sprayed that leads to
the inlet side of the pump / fluid section.
See Also: Return Tube
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The thickness of the coating during or after spraying.
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The one-piece seal that goes between the Graco RAC tip guard and
the tip.
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The hole in the tip that the material passes through on its way
to the surface being sprayed. The size of the orifice regulates the amount of material
that passes through thereby controlling the amount of product dispersed.
Also See: Fan |
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When paint or other coatings are atomized, the tiny droplets form
a cloud that may go beyond the edges of anything being sprayed.
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The material used to make a liquid tight seal
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A spray gun on an extension pole used to spray in hard to reach
places. Also used in lieu of standing on scaffolding.
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The device on an airless sprayer that regulates the pressure of
material output to the hose and spray gun.
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Similar to a conventional paint roller but designed to attach to
an airless hose or gun and deliver, at a low pressure, a coating through the roller
cover thereby eliminating the need to dip the roller into a tray of coating.
Shop pressure rollers |
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See: Pressure Control
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This is the act of getting the material to be sprayed into the pump
and removing air from the system in preparation to spray.
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- 1. The entire sprayer
- 2. The fluid section of the sprayer
See also; Diaphragm Pump Piston Pump Single Double
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A pump preserver by Graco which is used after thoroughly cleaning
an airless sprayer to help protect the fluid-section from rusting / deteriorating
while it is not in use.
Purchase Pump Armor |
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RAC (IV, 5, X)
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RAC is an acronym for Reverse-A-Clean, the ability to spin the tip
at a 180 rotation to blow out a clogged tip.
RAC IV, 5, and X refers to the different types of spray tips.
Also See: Tip Sizes and Tip
Sizing |
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The smaller tube on a airless paint sprayer that returns material
to the container during the priming of the pump.
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When spraying a textured surface the pattern might not fully coat
the entire surface. Shadows are overcome by spraying the surface from the opposite
direction filling in the shadowed areas.
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An advanced microprocessor on Graco sprayers control delivers:
- A consistent spray fan at all spraying pressures.
- Zero dead band (no pulsating, steady consistent pressure) at
lower spraying pressure, ideal for fine finish spraying.
- Graco's WatchDog System automatically shuts sprayer off when
paint supply bucket is empty to prevent sprayer damage
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The pattern of spray created by the airless sprayer and tip. Usually
long and narrow in shape with a new, average sized tip. The fan may become an oblong
oval or oval after tip wear and even a circle after extreme wear.
See fan size. More about airless
sprayer tip sizing. |
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The final piece of the spray equipment that the coating material
passes through and normally causing atomization which creates a spray from the liquid.
Different tip orifices mixed with various pressures atomize the material in numerous
ways creating a wide range application scenarios.
More about sprayer tip sizes |
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Liquid compound that is placed in a small cup that surrounds the
top of the pump rod to keep the packings wet and lubricated and also keeps overspray,
that may come in contact with the rod, from sticking to it and causing damage to the
packings.
Buy Throat Seal Liquid |
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A tubular extension that attaches to the sprayer gun in place of
the tip guard. The tip guard then attaches to the end of the extension. Available
in many lengths and used to paint (average height) ceilings without a ladder, spraying
decks without bending over, under eves etc.. Being away from the tip also reduces
the amount of paint you get in your face and on yourself!
Shop Tip Extensions |
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Avoid poison oak at all times! Don't eat yellow snow. ;-)
See: Spray Tip |
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The piece attached to the spray gun around the tip to help prevent
direct contact with the tip thereby preventing injection injuries.
See Also: Airless Safety |
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See: Throat Seal Liquid
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A measurement of the resistance of a liquid to deform and/or break
/ shear apart under stress. Most people think of this as thickness or thinness. There
are many ways to measure viscosity, The Zahn Cup is probably
the most recognized device and method as well as accurate.
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A short, usually smaller diameter section of high-pressure airless
hose that goes between the spray gun and the main hose to provide more flexibility
and control and also reducing hand fatigue.
Shop Whip Hoses |
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Device used to measure viscosity of a liquid. Widely used in the
paint industry to keep coatings consistent between batches being manufactured as well
as for measuring materials that are being thinned for various reasons.
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