16
6.6
CHECKING THE DIAGNOSTIC WINDOW
BYPASS PORT
PTP PORT
Connected to
The hydraulic bypass valve
on the side of the pump head
The PTP push-button valve
on the top of the pump head
Function
Bypass protects the pump
from excessive pressure and
hydraulic upset conditions
Allows any air trapped in the
hydraulic system to escape
Normal operation
No oil should move through
this port when the pump is
operating normally
Small amount of oil will weep
from port during operation,
flow increases if PTP button
is depressed
Abnormal operation
Oil is seen flowing from the
port
No oil moving through the
port at any time, or product
(not oil) is seen
Things to check if
abnormal operation is
suspected
o
Discharge pressure too
high
o
Bypass valve setpoint too
low
o
Bypass valve malfunction
o
Other upset condition
o
PTP damaged
o
HPV filter screen clogged
o
HPV not operating
properly
o
Diaphragm damaged
PTP port
(center)
Bypass port
(side)
Summary of Contents for PULSAR 25HJ
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