Pressure Sensitive Regulating Unloader
Bypass Mode
Bypass
To
Gun
Gun trigger valve is closed, gun is
not in use. Pump flow enters from
the left of the diagram (inlet port),
dead ends against output check
valve, overcomes the spring
pressure holding the piston
assembly and is forced down
through the bypass port.
CAUTION: A minimum bypass of 5 -
10% of the UNLOADER RATED
FLOW CAPACITY is required for
proper unloader performance.
Inlet Port
Outlet Port
Bypass Port
P
is
to
n
A
s
s
e
mbly
WARNING:
DO NOT
OPERATE THE PUMP
IN BYPASS MODE
LONGER THAN 2
MINUTES.
Pump
Flow
Check
Valve
16
