Graymills DDP 1' Pump OMI - Manual (Page 7)

7
Mountings
CAUTION
The pump exhaust air may contain contaminants.
Ventilate to a remote area if the contaminants could
affect your fluid supply. See Air Exhaust Ventilation
on page 10.
1. Be sure the mounting surface can support the weight of
the pump, hoses, and accessories, as well as the stress
caused during operation.
2. For all mountings, be sure the pump is bolted directly
to the mounting surface.
3. For ease of operation and service, mount the pump so
the air valve cover (2), air inlet, and fluid inlet and
outlet ports are easily accessible.
4. Rubber Foot Mounting Kit 784–90658 is available to
reduce noise and vibration during operation.
Fluid Suction Line
D Ground the fluid system. See Grounding on page 5.
D The pump fluid inlet (R) is a 1” raised face flange. See
Flange Connections on page 8.
D If the fluid inlet pressure to the pump is more than 25%
of the outlet working pressure, the ball check valves
will not close fast enough, resulting in inefficient pump
operation.
D At inlet fluid pressures greater than 15 psi (104 kPa, 1
bar), diaphragm life will be shortened.
D See the Technical Data on page 24 for maximum
suction lift (wet and dry).
Fluid Outlet Line
WARNING
A fluid drain valve (J) is required to relieve pressure in
the hose if it is plugged. The drain valve reduces the
risk of serious injury, including splashing in the eyes or
on the skin, or contamination from hazardous fluids
when relieving pressure. Install the valve close to the
pump fluid outlet. See Fig. 2.
1. Use grounded fluid hoses (L). The pump fluid outlet
(S) is a 1” raised face flange. Refer to Flange Connec-
tions on page 8.
2. Install a fluid drain valve (J) near the fluid outlet. See
the WARNING above.
3. Install a shutoff valve (K) in the fluid outlet line.