VERDER VERDERAIR VA 25 Instructions-Parts List Manual page 8

Installation
Changing the Orientation of the Fluid Inlet and
Outlet Ports
The pump is shipped with the fluid inlet (R) and outlet (S)
ports facing the same direction. See Fig. 4. To change the
orientation of the inlet and/or outlet port:
1. Remove the screws (106 or 112) holding the inlet (102)
and/or outlet (103) manifold to the covers (101).
2. Reverse the manifold and reattach. Install the
screws (106 or 112). Torque the manifold screws to
9–10 NSm. See Fig. 4. See Torque Sequence, page 30.
KEY
N 1/2 npt(f) air inlet port
P Muffler; air exhaust port
is 3/4 npt(f)
R 1 in. fluid inlet port
S 1 in. fluid outlet port
1
Torque to 9 to 10 NSm. See Torque Sequence, page 30.
N
P
102
Acetal Model Shown
Fig. 4
8 819.4367
101 Covers
102 Fluid inlet manifold
103 Fluid outlet manifold
106 Manifold screws
112 Manifold screws
103
106
1
S
101
R
112
1
04155B
Fluid Pressure Relief Valve
Caution
Some systems may require installation of a pressure relief
valve at the pump outlet to prevent overpressurization and
rupture of the pump or hose. See Fig. 5.
Thermal expansion of fluid in the outlet line can cause over-
pressurization. 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 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.
KEY
R 1 in. fluid inlet port
S 1 in. fluid outlet port
V Pressure relief valve
Part No. 819.0159 (Stainless Steel)
1
Install valve between fluid inlet and outlet ports.
2
Connect fluid inlet line here.
3
Connect fluid outlet line here.
Fig. 5
S
3
V
1
R
2
04228B