Troubleshooting
Sec IV- 5
RELIEF VALVE DOES NOT
RELIEVE PRESSURE WHEN
VALVES ARE CLOSED
Incorrect setting of Control
(PMD) Valve
Check and repeat proper
procedures for setting relief
valve system. (See Section 3)
Relief Valve inoperative
Refer to the relief valve
manual.
RELIEF VALVE DOES NOT
RECOVER AND RETURN TO
ORIGINAL PRESSURE
SETTING AFTER OPENING
VALVES
Dirt in system causing
sticky or slow reaction
Refer to the relief valve
manual.
Clean the valve with a small
wire or straightened paper clip.
Refer to the relief valve
manual.
CONDITION
POSSIBLE CAUSE
SUGGESTED CORRECTION
Worn pump impeller(s) and / or
clearance rings
Installation of new parts
required.
Impeller blockage
Blockage in the impeller can
prevent loss of both capacity
and pressure. Back flushing
the pump from discharge to
suction may free blockage.
Removal of the pump head
may be required (this is
considered a major repair).
Blocked relief valve.
WATER IN PUMP GEARBOX
Leak coming from above pump
Check all piping connections
and tank overflow for possible
spillage falling directly on to
the pump gearbox.
If mechanical seal is installed,
there should be no leaks.
Inspect the oil seal and
replace if necessary.
Leaking Mechanical Seal
Содержание AP
Страница 36: ...Sec IV 8 Troubleshooting...
Страница 46: ...Sec V 10 Maintenance and Repair Booster Pumps Figure 5 7 CBP for Parts Identification...
Страница 51: ...Maintenance and Repair Booster Pumps Sec V 15 Figure 5 11 2CBP for Parts Identification...
Страница 58: ...Sec VI 2 Parts Lists Booster Figure 6 1 AP Pump...
Страница 61: ...Parts Lists Booster Sec VI 5 Figure 6 2 CBP Pump...
Страница 64: ...Sec VI 8 Parts Lists Booster Figure 6 3 2CBP Pump...