Graco 234418 Membrane Air Drying System - Manual (Page 5)

How Membrane Air Dryer Works
309920C 5
How Membrane Air Dryer Works
Pressure Relief Procedure
The following is a basic pressure relief procedure. Be
sure to follow the specific pressure relief procedure in
your spray gun and/or fluid supply equipment manuals.
1. Close the main air shut-off valve.
2. Trigger the gun or dispense valve and open any
drain valves to relieve pressure.
Maintenance
Air Filter with Auto Drain 234402
To maintain maximum filtering efficiency and avoid
excessive pressure drop, the filter must be kept clean.
See Manual 309919 for cleaning and parts information.
Coalescer with Auto Drain 234397
See Manual 309919 for operation, cleaning, and parts
information.
Air Regulator 234394
Be sure air to the regulator is clean. Erratic operation or
loss of regulation is usually caused by dirt in the regula-
tor. See Manual 309924 for cleaning and parts informa-
tion.
Wet air enters
membrane module Water vapor purges Clean, dry air
exits module
Water vapor permeates through
hollow membrane fibers
WARNING
To avoid injury, relieve air and fluid pressure before
checking, cleaning, or repairing the equipment.
• Relieve the pressure before cleaning, checking
or repairing equipment. Follow Pressure
Relief Procedure, above.
• Check system at least once per shift to ensure
proper drainage.
It is recommended that Air Filter 234402 be
installed upstream of the coalescing filter to
remove 5 micron and larger size particles and sep-
arate large droplets of moisture from the air line.
CAUTION
Never let the liquid level in the bowl reach the base of
the coalescing element.