GE H301 Series Operating Manual page 81

These PRVs are not pressure relief valves. PRV in this context
refers to pressure regulators. PRVs are not a positive shut-
off valve, and bypass a minimal amount of oil all the time.
Crankcase oil Changes
Check the crankcase oil level every 24 hours and before every start-up to ensure
proper levels.
Under no circumstances should a compressor be operated
with too little or too much oil. Maintain proper oil levels.
When checking the oil level, observe the condition of the oil. Replace the oil at any
time if it is diluted, broken down, thickened by sludge, or otherwise deteriorated.
On a new compressor, examine the oil and filter element after the first 24 hours of
operation or after the first shutdown, whichever comes first. The lubricating oil will
wash out the dirt and dust that may collect during shipment and installation.
If the crankcase oil is contaminated remove it immediately and either discard or
reclaim it for future use. Using reclaimed oil is entirely at the compressor owner's
discretion, but is strongly discouraged. Consult with a lubrication engineer from
the oil supplier as to the advisability of reusing oil.
Never put dirty or contaminated oil into a compressor.
maintenance
PRV's provide reliable "chatter-free" operation when the lubrication system is
free of abrasives and foreign materials. The piston fits loosely in the valve body,
so small debris can become trapped between the piston and valve body. If you
suspect the piston is stuck, shutdown the compressor and disassemble the PRV.
Inspect the piston and cylinder body to see whether trapped debris or scoring has
caused the piston to "hang up". The loose fitting piston should move freely within
the valve body. Minor scratches or scoring can be polished out. Major internal
component damage requires replacement of the entire valve.
The valve should be disassembled and inspected as part of the compressor's
scheduled maintenance (see
Complies with ANSI Z535, ISO 3864, OSHA 1910.145 (f) (9)
Complies with ANSI Z535, ISO 3864, OSHA 1910.145 (f) (9)
Complies with ANSI Z535, ISO 3864, OSHA 1910.145 (f) (9)
"Form 13").
H301/302 HSR Compressors | Rev. 2.2 | 71