Heavy Duty Balanced Opposed Compressors - Ariel Corporation

For Models: JGH:E:K:T Section 3 - Maintenance
disks. Any system blockage builds pressure and ruptures the disks, venting the system through the
blow-out disk to close the no-flow shutdown switch.
Oil then travels to the distribution blocks, which exactly apportion it to cylinders and packings.
Pistons in the distribution block intermediate sections move back and forth in a continuous cycle,
forcing lubricant successively through several outlets as long as pressurized lubricant feeds from the
inlet. A check valve at each outlet prevents oil from backing up in the block. A flashing LED on the
Proflo, DFNT, or magnetic indicator attached to the block indicates the block cycle rate.
From the distribution blocks, oil travels to cylinders and packings. The system provides 1 inch (25
mm) per minute of head at guide and cylinder inlets to help ensure long check valve life.
Some packing oil travels to cylinders, but the bulk of it drains out through the pressure vent/drain
fitting and the atmospheric drain, both on the bottom of the crosshead guide.
An oil level control valve, supplied by the packager and mounted on the skid, maintains proper level
in the crankcase sump to replace oil used in cylinder lubrication.
Force Feed Lubricator
The force feed lubrication
system oils the compressor
cylinders and piston rod
packings. Oil flows to the 150
micron sintered bronze filter
on the suction side of the force
feed lubricator pump directly
from the pressure side of the
frame lubrication system, or
from an overhead tank.
Filtered oil flows to a header
and to pumps on the force
feed lubricator.
A self-contained oil reservoir
oils the force feed lubricator
worm gear and cam. The force
feed lubricator sight glass
shows the reservoir oil level.
Use the 1/4-inch tube fitting
connections in the discharge
lines near the force feed
lubricator pumps to prime the
force feed lubrication system.
Force Feed Lubricator
Adjustment
1
2
3
4
5
6
7
8
FIGURE 3-5 Force Feed Lubricator - Typical
1. Inlet Header
2. Priming Stem
3. Pump Plunger Stroke
Adjustment Screw
4. Lock Nut
5. Lubricator Oil Fill
Connection
6. Sight Glass
7. Mounting Flange
Capscrews (4)
8. Drain Plug
9. Pump Inlet from
Header
10. Priming Pump
Connection
11. Pump Outlet to
Distribution Block
12. Rupture Disc Assembly
13. O-Ring - oil before
assembly
14. Sprocket
15. No. 204 Woodruff Key
16. Set Screw
17. Sprocket Face-to-Face
Thickness
Verify the force feed lubricator is set at the break-in rate shown on the force feed lubricator data plate
(see Fig. i-1). A flashing LED on the Proflo or no-flow switch connected to the distributor block
indicates block cycle rate. To adjust, loosen locknut and turn the feed regulator (pump plunger stroke
adjustment screw) until the indicator strokes at the proper rate, then tighten locknut. For new units,
run at the break-in rate for 200 hours, then reduce the lubricator adjustment to the normal operating
rate shown on the force feed lubricator data plate.
NOTE: Install a blow-out fitting with a properly rated rupture disk between the force feed lubricator
pump and the no-flow shutdown. The disk color should show at the fitting blow-out
hole. The no-flow shutdown must actuate within 3 to 5 minutes after oil flow interruption.
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