Edwards RV3 Instruction Manual

7.5 The pump surface temperature is above 100 °C
Note:
If the inlet pressure is connuously higher than 100 mbar (1 x 10
4
Pa), the surface
temperature of the RV12 pump can reach 115 °C when the ambient temperature is 40 °C.
▪ The ambient temperature is too high.
▪ The cooling-air supply is insucient or is too hot.
▪
The electrical supply voltage is too high.
▪
The outlet-lter or the outlet pipeline is blocked.
▪
The oil-level is below minimum level.
▪
The pump has been lled with the wrong type of oil.
▪
The oil is contaminated.
▪
The process gas is too hot or the throughput is too high.
7.6 The vacuum is not fully maintained aer the pump is switched o
▪
The gas-ballast control is open (in posion ‘I’ or ‘II’).
▪
The inlet valve-pad is damaged.
▪ The inlet valve has not closed.
7.7 The pumping speed is poor
▪ The connecng pipelines are too small in diameter.
▪ The connecng pipelines are too long.
▪ The inlet-lter is blocked.
7.8 There is an external oil leak
▪ The outer sha-seal is worn or damaged.
▪
The oil-box gaskets have deteriorated.
▪
There is an oil leak from the gas-ballast control.
▪ There is an oil leak from the drain-plug.
▪
There is an oil leak from the sight-glass.
03/2021 - ©Edwards Limited
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A65201880_AA - Fault nding

Edwards RV3 Specifications

General

Brand	Edwards
Model	RV3
Category	Water Pump
Language	English