ES IOM Rev 1
-
5/13/2021
7
NOTICE:
Both Pressure Relief locking caps come
with a control marker listing the existing
pressure setting. Removal of the control
marker will void all warranty of BPOC
products.
BI
-
DIRECTIONAL PRESSURE RELIEF PLATE SETTING
The Bi
-
Directional Pressure Relief Plate pressure setting should be set a minimum of 20
-
30 psi higher than
the operating pressure. When adjusting the pressure setting, the correct locking cap must be adjusted for
the correct direction of flow at operating rotational speed of the pump
’
s drive shaft. Pressure may be ad-
justed within a range of approximately 20 psi per spring. Additional springs are available for higher psi
changes. Contact your BPOC repair or warranty agent for more information.
Adjusting the PRESSURE SETTING:
1.
To INCREASE the pressure setting
, remove the correct locking cap (see selecting the correct locking
cap). Loosen the locking nut, and then rotate the setting screw clockwise. Record the difference
between original and new settings. Tighten the locking nut, and replace the locking cap.
2.
To DECREASE the pressure setting
, remove the correct locking cap (see selecting the correct lock-
ing cap). Loosen the locking nut, and then rotate the setting screw counterclockwise. Record the
difference between original and new settings. Tighten the locking nut, and replace the locking cap.
Selecting the CORRECT LOCKING CAP viewing the front plate of the pump:
To adjust
flow pressure for CLOCKWISE shaft rotation
:
a)
The drive shaft below the idler shaft. Adjustments must be made to the
RIGHT side spring
.
b)
The drive shaft above the idler shaft. Adjustments must be made to the
LEFT side spring
.
To adjust
flow pressure for COUNTERCLOCKWISE shaft rotation
:
a)
The drive shaft below the idler shaft. Adjustments must be made to the
LEFT side spring
.
b)
The drive shaft above the idler shaft. Adjustments must be made to the
RIGHT side spring
.
NOTICE:
Adjustment of pressure settings by any
party other than a specified BPOC repair or
warranty agent will void all warranty of
BPOC products.
NOTICE:
Any internal pump relief valve is designed to protect the pump from excessive pressure and
must NOT be used as a system pressure control valve. See your local Bowie dealer for a list
of Bowie manufactured system pressure control valves.
BI
-
DIRECTIONAL PRESSURE RELIEF PLATE
An available bi
-
directional pressure relief plate is manufactured and can be supplied by Bowie Pumps of
Canada Ltd. This will set a different maximum pressure for each direction of fluid flow. Initial pressure is
set at the factory to the customer
’
s specifications, based on the specific operational rotational speed of the
pump
’
s drive shaft.
BI
-
DIRECTIONAL PRESSURE RELIEF PLATE OPERATION
Pressure Relief locking caps are
exposed to and retain some
pumped fluids