7
11. Screw in the Bypass Valve Adjusting Screw, not
exceeding two turns per minute until the desired
differential pressure is reached.
12. While retaining the Adjustment Screw, lock the
Adjusting Screw Lock Nut against Bypass Valve
Cover immediately after adjustment is made.
13. After the setting of the Bypass Valve is completed,
wire and seal Adjusting Screw, utilising holes
provided for passing wire through head of
Adjusting Screw and lug on Bypass Valve Cover.
Bypass
Valves
characteristically
exhibit two distinct pressures during
their operation:
a)
The
‘setting’ or ‘cracking’ pressure which
occurs when the Bypass Valve first opens i.e.
initial bypassing begins against the preset
spring load, and;
b)
‘Maximum’ pressure, which occurs when the
full flow of the bypassed product passes
through the Bypass Valve.
It is important to ensure both these above
characteristics are understood fully in order to
correctly apply the Bypass Valve.
If any aspect of the
Pumpset or pumping
system does not
function properly, immediately turn the pump 'off'
and rectify the problem before re-starting.
14 Record discharge pressure in the commissioning
section of the Pump Run Log.
15. Check that motor current is below FLA rating.
Record the motor current readings in the
commissioning section of the Pump Run Log
.
NOTE:
During this procedure, or at any time,
motor current must not exceed FLA rating of
motor.
16. Stop pump, restart and check for consistent results,
rectify if required.
17. Record discharge pressure and current readings in
the commissioning section of the Pump Run Log.
18. The Pumpset is now ready for normal operation.
19. The start-up procedure is now complete.
20. Inspect Pumpset/pumping system frequently during
the first few hours of operation then periodically
thereafter (see Section 4.5 for frequency).
Record the observations from these inspections in
the Pump Run Log
.
4.5 PERIODIC INSPECTION
Periodic Inspection of the Pump, Pump System and
Ancillary Equipment is required to maintain safety,
conformity, operational functionality and reliability.
Ebsray recommends a maximum interval of three
months or 500 hours operation between routine
periodic maintenance inspections (More frequent
inspections may be necessary dependent upon
usage, site conditions, operation etc).
If any abnormal condition is discovered, cease
operation of pump immediately and take action to
rectify the problem. Record observations from these
inspections in Pump Run Log.
For safe operation, the following items should be
included in the routine periodic inspection:
a.
Inspect the Pump for LPG leaks, vibration,
abnormal
noises,
signs
of
overheating,
discolouration, etc.
b.
Inspect Coupling Assembly for signs of wear,
overheating, discolouration, etc.
c.
Check Pump differential pressure
d.
Check Motor Current.
e.
Inspect motor for vibration, abnormal noises, signs
of overheating, discolouration, etc.
WARNING
ER
NOTE:
