Quincy QSV 2200, Instruction Manual

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Section V - Options
72 Quincy Vacuum Pump-QSV Series
5.3 Operation
Description
The vacuum pump oil flow is controlled by an electronic thermostatic valve (BV), ensuring reliable vacuum
pump operation and optimum energy recovery.
An electronic thermostatic valve is integrated in the oil filter housing of the vacuum pump and controls the
oil flow to the heat exchanger (HE) and the main oil cooler (Co) of the vacuum pump.
Flow diagram of vacuum pump with energy recovery system
The electronic thermostatic valve starts closing the internal bypass line over the oil cooling circuit at the lower
limits of its temperature range. At the upper temperature range, above the condensation temperature, the
bypass line is completely closed and all the oil flows through the heat exchanger.
In case no energy is recovered, the thermostatic valve will automatically switch to the main oil cooling system.
Energy recovery system in use

vacuum pump start-up
When the vacuum pump is started up from cold, the oil temperature will be low. The electronic thermostatic
valve shuts off the oil supply to the oil cooling system to prevent the vacuum pump oil from being cooled.
The oil flows from the oil separator vessel (OT) via internal bypass, through the oil filter(s) (OF) back to
vacuum pump element (E).
All energy input is used to rapidly warm up the vacuum pump oil. No energy is recovered.

Maximum energy recovery