F
OR
M
ODELS
: JGI, JGM, JGN, JGP
AND
JGQ
S
ECTION
3 - S
TART
U
P
PAGE 3-11
Maximum allowable working pressure is the maximum continuous gauge pressure for which
the compressor manufacturer has designed the equipment (or relevant part thereof) when
handling the specified fluid at the specified temperature.
Maximum allowable working pressure of compressor cylinders shall exceed the rated dis-
charge pressure by at least 10 %, or 25 psi (1.7 bar), whichever is greater. The maximum
allowable working pressure shall be at least equal to the specified relief valve set pressure
including accumulation. The rated discharge pressure (RDP) is the highest pressure
required to meet the conditions specified by the purchaser for the intended service.
Relief Valve Settings
It is the responsibility of the packager to provide relief valves for every stage of compression
in compliance with ISO 13631. Relief valve location and settings, including accumulation,
shall take into consideration all possible types of equipment failure, mal-operation and the
protection of piping systems. Relief valves shall be set to operate at not more than the max-
imum allowable working pressure, but not less than the values listed in ISO 13631:
Filling Sump & Priming a Main Oil Lube Oil System -
Before Starting
Filling The Sump
1.
For compressors with automated lubricating oil fill systems, activate to fill the oil
sump.
2.
For compressors without automated fill which use the crankcase as the oil
sump, remove breather and fill compressor sump with lubricating oil through top
cover. When the sump is filled to the proper level, replace and snug up the
breather cap by hand, to facilitate later removal.
3.
Check sight glass on auxiliary end. Oil level at start-up should be near the top of
CAUTION
WHEN A BYPASS IS FURNISHED, A RELIEF VALVE MUST BE INSTALLED
IMMEDIATELY DOWNSTREAM OF THE BYPASS VALVE OR ON THE INLET
SCRUBBER OF THE DOWNSTREAM CYLINDER. THIS RELIEF VALVE MUST
NOT BE SET HIGHER THAN THE MAXIMUM ALLOWABLE WORKING
PRESSURE OF THE CYLINDER WHICH HAS THE LOWEST MAWP OF THOSE
IN THE BYPASS CIRCUIT. THIS IS TO PROTECT AGAINST DISCHARGE
CHECK-VALVE FAILURE WHEN OPERATING ON BYPASS.
!
