F
OR
M
ODELS
: JGI, JGM, JGN, JGP
AND
JGQ
S
ECTION
4 L
UBRICATION
PAGE 4-21
plate are calculated according to the Ariel Lube Specifications, as given in this document, to
match the gas and operating conditions as supplied to Ariel with the compressor order. The
lube sheets supplied in the Ariel Parts Book state gas conditions and list the base rate multi-
plier at each lube point. If gas conditions were not supplied with the compressor order, the
information plate/lube sheets rates are for clean, dry, 0.65 specific gravity, sweet gas at
rated speed and discharge pressures.
If the compressor operating conditions change (such as gas properties, gas pressures, tem-
peratures or flow requirements or cylinder re-configuration) the lubrication rates must be
recalculated and hardware changes may be necessary to the force-feed lubrication system.
Consult Table 4-9 and your Packager and/or Ariel.
Cycle Time Indication
To set the proper force-feed lubricator pump flow rate, read the cycle time on the Proflo elec-
tronic lubricator fluid-flow monitor/no-flow timer switch located at the distribution block or in
control panel, reference Technical Manual Section 5. Or if a digital no-flow timer switch
(DNFT) is provided, time the cycle from flash to flash, or for a magnetic cycle indicator
assembly, time the cycle from initial movement of the indicator pin at the fully retracted posi-
tion to the time when the pin returns to the fully retracted position and just begins initial
movement back out again. Adjust the lubricator pump to provide the required cycle time-flow
rate.
NOTE: WHEN ADJUSTING THE FORCE FEED LUBRICATION PUMP SETTING FOR
THE APPROPRIATE CYCLE TIME, DO NOT SET THE FLOW RATE TOO LOW.
THE PUMPS CAN BECOME INCONSISTENT WHEN SET TOO LOW.
Force Feed Lubrication System Monitoring:
Minimum Requirements
Ariel requires the unit control panel to shutdown the unit if the master lube distribution block
stops cycling while the compressor is running. The control panel is to wait for a maximum
time of 3 minutes after the distribution block stops cycling to issue the shutdown. This is a
class B shutdown. A class B shutdown is defined as a shutdown that is not armed until a
short time after the compressor is started. Typically 2 minutes. This gives the divider blocks
time to cycle the first time before the shutdown is activated.
Devices
Ariel offers several devices that can be used to obtain the lube system shutdown. There are
two basic types. Note that some devices have both functions built in.