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> Intake valve,graco EH333, 23-1MK airless paint sprayer
Intake valve,graco EH333, 23-1MK airless paint sprayer
This is an Intake valve assembly for two type of Graco paint spray units. Fits models EH333, 23-1 Monark. A bad intake valve can cause your sprayer to work much harder than it is intended to. If it is totally worn your pump will not suck up paint at all. That degree of damage ought to be visible on the seating bevel and the seating ball. Damage can be difficult to see without a magnifying glass-and knowing what, exactly, to look for. But, nearly any level of damage can be detected if your pump is producing good pressure, but bleeds off-even when not triggered. Movement of the piston downward, after the gun trigger is released, unit attains full pressure and shuts off; means that the intake valve is leaking. In situations where your pump is NOT making pressure, a bad valve can be detected by putting your hand over the suction tube opening, while trying to pump water (leave your fingers very loose over the hole), and feel for the water flow to rush inward. If water rushes back outward, then the suction valve is bad. A pump can operate with a minimally worn valve, but it will shortly be working the entire sprayer much harder than it should be. While packings, rods and cylinders are often seen as the major wear parts, many times the intake (and outlet) valve is overlooked and the sprayer seems to breakdown more and more frequently.
