Flowserve Circulator - Manual (Page 4)

4
3.5 Pressure relief valve reset procedure
The pressure relief valve on the right end of the mani-
fold is factory set at 450 psig (3103 kPa) and should
not require adjustment.
If however, the relief valve setting
has become suspect or the seal requires a lower setting,
follow these steps to reset the pressure relief valve. Do not
exceed 450 psig (3103 kPa).
3.5.1 To prevent accidental over pressurization of
the seal, connect the seal supply port directly
to the seal return port. This will protect the
seal from high pressures during valve adjust -
ment.
3.5.2 Completely close the pressure control
valve on the left end of the manifold.
3.5.3 Completely open the pressure relief valve on
the right end of the manifold.
3.5.4 Start the circulator and allow to run long
enough to remove any air from the system. All
fluid flow should be through the pressure relief
valve and into the reservoir.
3.5.5 Carefully close the pressure relief valve on the
right end of the manifold until the desired pres-
sure is maintained in the system.
3.5.6 Shut down the circulator. The pressure relief
valve is now set at and will not need further
adjustment. Higher adjustment of the pressure
relief valve may cause damage to the pump.
3.5.7 Once the pressure relief valve is set, reset the
pressure control valve setting. Refer to the
previous section of this document.
4 Maintenance
Caution: Do not attempt to work on this system unless
you have on safety glasses with side shields
and you have completely read and understand
this service manual.
4.1 Electrical/power input
Shut down all electrical power to the circulator prior to
attempting maintenance.
4.2 Service of suction strainers
To service the suction strainer, the circulator pump must
be shut off. Make sure the circulator motor cannot be auto
started. Remove top plate of reservoir. Strainers should be
checked and cleaned every 12 months.
4.3 Customer electrical
It is the customer’s responsibility to provide a control panel
to properly operate the circulator.
4.4 Pressure filter
4.4.1 Caution: Do not attempt to open any lines,
loosen fittings or remove filter canister unless
all pressure gauges read zero pressure.
Be sure that instrument isolation valves are
open to gauges. Always wear safety goggles
with side shields when performing mainte-
nance or making adjustments to the system.
4.4.2 After 8 hours of initial start-up or sooner
per clogging indicator, the filter element
should be changed.
4.4.3 Change element every time the clogging indi-
cator on the filter is in the red service filter
position.
4.5 Questions
Do not hesitate to contact your Flowserve representative
with any questions you have concerning the installation,
operation or maintenance of the circulator.