Heavy Duty Balanced Opposed Compressors - Ariel Corporation

FOR MODELS: JGZ AND JGU SECTION 4 LUBRICATION
to make the “normal” cycle time, to maintain a stroke greater than 20% in the functioning
pump(s).
Running Conditions
When the machine is running, make sure that the oil level in the lubricator reservoir is at least
one-half way up the sight level, but does not exceed two-thirds.
See your packager's specific data to determine the normal operating conditions, the cylinder
working pressures, and the rated speed.
System Design Considerations and Operating Parameters
To optimize force-feed lubrication system operation, Ariel uses the following general guidelines:
1. Maintain lube ratios within prescribed limits and cycle times as low as possible
(normally 10 sec minimum) to provide each point with lubrication as frequently as
possible.
2. Multiple pumps with manifolding are used to ensure that 150% of the normal lubrication
rate can be provided during break-in.
3. Pumps are not allowed to operate below 20% of full stroke, the point at which they
become unreliable.
4. In some applications, to optimize operation of the lubrication system, a single
divider section is used to deliver lubrication to both a packing and a cylinder.
5. In some applications, cross-porting of divider valves is used to deliver the proper
proportion of lubricant to a given point.
Force Feed Balance Valves
Balance Valves may be used in high differential-pressure distribution-block
applications to reduce system problems such as
bypassing, no-flow switch errors or blown rupture discs. The
force feed balance valve is shown in the Figure.
Setting and Maintaining Balance Valves
Balance valves cannot be set prior to operating the unit. Ensure
that all fittings are tight and any known leaks have been fixed.
Purge the force feed lube system with a high-pressure hand
pump, using the same injection oil that is used in service, to re-
FIGURE 4-12: FORCE FEED
BALANCE VALVE
move any trapped air or gas in the system. See Technical Manual Section 7 for pump illustration
and part number. DO NOT USE ANY OTHER FLUIDS FOR PURGING!
Start up the compressor and bring up to normal operating pressure. After the operating pressures
have stabilized, adjust the cap on the top of the balance valve if necessary. Loosen the
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