Instruction book
6996 0224 30 21
2.4 Oil flow
Oil injected into the pump chamber serves to seal, lubricate and cool the pump. The oil entrained with the
compressed gas is coarsely trapped in the bottom part of the oil casing. Then fine filtering occurs in the
integrated exhaust filter elements. The proportion of oil in the exhaust gas is thus reduced below the
visibility threshold (over 99 % entrapment rate). The oil trapped in the exhaust filters is returned to the
generator via an oil return line. To prevent gas flowing at atmospheric pressure from the oil reservoir into
the intake port, the oil return line is controlled by a float valve. The oil cycle is maintained by the pressure
difference existing between the oil casing (pressure above atmospheric pressure) and the intake port
(pressure below atmospheric pressure).
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