Graymills DDP .375' Pump OMI - Manual (Page 8)

8
Installation
Changing the Orientation of the Fluid Inlet
and Outlet Ports
The pump is shipped with the fluid inlet and outlet ports
facing the same direction. See Fig. 2. If desired, the direc-
tion of one or both ports can be changed. Remove the
manifold(s) from the pump as explained in steps 1, 2, and 4
on page 21. Reattach with the port facing the desired
direction. Do not over-torque.
Fig. 2
1
3
4 2
1/4 npt(f) air inlet
01459B
Apply thread lube, and torque to 50 to 60 in-lb (5.6
to 6.8 N-m). Do not over-torque.
3/8 npt(f) fluid inlet
3/8 npt(f) fluid outlet
5
3/8 npt(f) air exhaust port
1
2
3
5
4
Fig. 3
1
3
4 2
1/4 npt(f) air inlet
01459B
Apply thread lube, and torque to 50 to 60 in-lb (5.6
to 6.8 N-m). Do not over-torque.
3/8 npt(f) fluid inlet
3/8 npt(f) fluid outlet
5
3/8 npt(f) air exhaust port
1
2
3
5
4
Pump Shown
Fluid Pressure Relief Valve
CAUTION
Some systems may require installation of a pressure
relief valve at the pump outlet to prevent overpressur-
ization and rupture of the pump or hose. See Fig. 4.
Thermal expansion of fluid in the outlet line can cause
overpressurization. This can occur when using long
fluid lines exposed to sunlight or ambient heat, or when
pumping from a cool to a warm area (for example,
from an underground tank).
Overpressurization can also occur if the Husky pump is
being used to feed fluid to a piston pump, and the
intake valve of the piston pump does not close, causing
fluid to back up in the outlet line.
Connect fluid outlet line here.
Fig. 4
KEY
A 3/8 npt(f) fluid inlet port
B 3/8 npt(f) fluid outlet port
C Pressure relief valve
Part No. 110134 (aluminum)
Part No. 112119 (stainless steel)
1
3
2
Connect fluid inlet line here. Use a compatible
liquid thread sealant or Teflon
R tape on con-
nection to prevent air from getting into the
material line.
Install valve between fluid inlet and outlet ports.
C
A
B 1
2
3
01539B
1