All electric motor driven compressors and all unattended start compressors with any type of
driver must have an electric or pneumatic driven prelube pump to ensure oil flow prior to
start-up. A start permissive should disable the start-up sequence if oil pressure is below 10
psig (0.7 barg). Motor driven prelube pumps should be sized at 30 psig (2.0 barg) and a flow
rate equal to half the flow rate of the compressor frame lube oil pump (see Table 1-1 on
page 1-2). A compressor prelube cycle is strongly recommended for all compressors to
extend bearing life.