Service manual

RELIEF VALVE
Each endplate can relieve the pressure in one flow
direction only. As such, if the valves are set in
opposing directions, each direction is
independently adjustable. So it is possible to
pressure relieve at 80 PSI in one direction, while
30 PSI in reverse. It is important for the operator
to understand which valve controls each flow
direction.
Relief Valve Setting
The standard factory setting for the forward flow
in the pump is 80 psi. This is done by setting the
flat where the hex meets up with the threads of
the adjuster bolt flush with the edge of the lock
nut. Backing the bolt out from this setting will
lower the pressure. Tightening it will increase
pressure at which the valve will open.
Caution:
A relief valve is necessary to protect the pump and
system from potentially dangerous over-pressure.
The relief valve will operate in the event of a restriction
in the discharge line or the inadvertent closure of a
downstream valve.
The valve must not be used as a flow control device.
If the pump is supplied without an internal relief valve,
a suitable external relief to the system must be supplied
The internal relief valve will have been factory set.
However, check for correct operation upon installation.
Re-adjustment may be necessary due to viscosity
variations.
BearCat Pumps, LLC
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