Graymills DDP 1' Pump OMI - Manual (Page 10)

10
Air Exhaust Ventilation
FIRE AND EXPLOSION HAZARD
Be sure to read FIRE OR EXPLOSION
HAZARD and TOXIC FLUID HAZARD
on page 3, before operating this pump.
Be sure the system is properly ventilated for
your type of installation. You must vent the
exhaust to a safe place, away from people, animals,
food handling areas, and all sources of ignition when
pumping flammable or hazardous fluids.
Never use polypropylene pumps with flammable fluids.
Diaphragm failure will cause the fluid being pumped to
exhaust with the air. Place an appropriate container at
the end of the air exhaust line to catch the fluid. See
Fig. 6.
WARNING
The air exhaust port is 3/4 npt(f). Do not restrict the air
exhaust port. Excessive exhaust restriction can cause erratic
pump operation.
To provide a remote exhaust:
1. Remove the muffler (P) from the pump air exhaust
port.
2. Install a grounded air exhaust hose (T) and connect the
muffler (P) to the other end of the hose. The minimum
size for the air exhaust hose is 3/4 in. (19 mm) ID. If a
hose longer than 15 ft (4.57 m) is required, use a larger
diameter hose. Avoid sharp bends or kinks in the hose.
See Fig. 6.
3. Place a container (U) at the end of the air exhaust line
to catch fluid in case a diaphragm ruptures.
Figure 6
KEY
A Air supply line
B Bleed-type master air valve
(required for pump)
C Air regulator
D Air line quick disconnect
E Master air valve (for accessories)
F Air line filter
P Muffler
T Grounded air exhaust hose
U Container for remote air exhaust
F B E C
A
D
VENTING EXHAUST AIR
P
T
U
04168A