On ZT compressors, oil is circulated by pump (OP) from the sump of the gear casing to cooler (Co). Then,
the oil flows through the cooling jackets of compressor elements (El and Eh). From there, the oil flows through
filter (OF) towards the bearings and timing gears.
Valve (BV) opens if the oil pressure should rise above a given value.
2.5 Cooling system
Flow diagram, ZR
Instruction book
31
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