Graco 234418 Membrane Air Drying System - Manual (Page 4)

Parts
4 309920C
Operation
1. Attach air hose(s) to air regulator outlet valve
289165.
2. Open main shut-off valve 288798.
3. Turn the T-hand adjusting screw in or out to adjust
regulator to desired setting.
4. Open outlet valve 289165 to supply air to spray
guns or tool.
5. With air flowing, readjust air pressure regulator if
necessary.
6. Turn off unit when not in use. Follow Pressure
Relief Procedure, page 5.
Coalescer Pressure Drop Indicator
The differential pressure drop indicator provides early
detection of a clogged coalescing filter element. As the
filter element becomes clogged, the red indicator starts
to rise while air is flowing through the unit. When the
pressure drop across the element reaches 10-12 psi
(69-83 kPa, 0.7-0.8 bar), the red indicator will be in full
view, and the element should be replaced. Failure to
replace the element when the pressure drop exceeds 10
psi (69 kPa, 0.7 bar) will affect your air quality and tool
efficiency.
Auto Drain
When the bowl is pressurized, the piston travels down
against the spring and closes the drain opening. When
the bowl is depressurized (i.e., overnight when system is
shut down), the spring lifts the piston from the seal,
allowing the bowl to drain.
Parts
WARNING
Do not exceed the Maximum Incoming Air Pressure of
the equipment. Over pressurizing can cause compo-
nent rupture and serious injury.
You can also push the piston stem on the bottom of
the filter to manually drain the bowl.
Part No. Description
234402 Air Filter with auto drain; see manual
309919 for parts information
234397 Coalescer with auto drain; see manual
309919 for parts information
118560 Membrane Air Dryer
234394 Air Regulator; see manual 309924 for
parts information
289165 Shut-off Valve
288798 Shut-off Valve
289165
234394
234397 234402
288798 118560