Heavy Duty Balanced Opposed Compressors - Ariel Corporation

FOR MODELS: JGZ AND JGU SECTION 4 LUBRICATION
break-in and normal lube timing rates which are stamped on the lubricator box information
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 multiplier
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 maximum
frame rated speed or cylinder rated speed whichever is less, and cylinder MAWP.
Adjusting the cycle time changes the lubrication rate for all of the compressor cylinders and
packings supplied by a particular divider valve. To change the lubrication rate for only one cylinder
or packing would require individual divider valve changes. Contact your packager or
Ariel for information.
If the compressor operating conditions change (such as gas properties, gas pressures, temperatures
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 4-6 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 electronic
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 position 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.
Choosing a Lube System Monitor
When ordering an Ariel compressor the packager must choose a lube system monitor. See the
following table for the specifications on available types. For further information about each de-
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