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14 312877P
Fluid Pressure Relief Valve
FIG. 6. Fluid pressure relief kit (Aluminum pumps only, 1050A models)
Some systems may require installation of a
pressure relief valve at the pump outlet to pre-
vent overpressurization and rupture of the
pump or hose.
Thermal expansion of fluid in the outlet line
can cause overpressurization. Thermal
expansion 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 also can occur if the
Husky pump is 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.
FIG. 6 shows Fluid Pressure Relief Kit 238428
for aluminum pumps. Use Fluid Pressure
Relief Kit 112119, not shown, for plastic
pumps.
Apply thread sealant on threaded connec-
tions and install kit between fluid inlet and
outlet manifolds.
Connect fluid inlet line in one of the
optional ports.
2
Connect fluid outlet line in one of the
optional ports.
3
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