Edwards RV3 Instruction Manual

With the mode selector set to High Throughput mode S, pressurised oil is fed to the
high vacuum and low vacuum stages. In this mode of operaon, the pump can sustain
long‑term high inlet pressures.
2.4.2 Gas-ballast control
To pump high vapour loads, gas-ballast is delivered into the pump to prevent
condensaon of the vapour carried by the pumped gases.
Air can be introduced to the low vacuum stage through the gas-ballast valve.
Alternavely, an inert gas such as nitrogen can be supplied through a suitable external
valve.
The gas-ballast control has three posions:
▪
Closed (posion ‘0’)
▪
Low ow (posion ‘I’)
▪
High ow (posion ‘II’)
2.5 Construcon
The pump-shas and rotors are made of high-grade cast-iron. The pump-body and oil-
box are made from cast-aluminium. All surfaces of the pump which are exposed to the
pumped gases are free from copper, zinc and cadmium.
Other materials of construcon include uorocarbon elastomer, nitrile, silicon,
chemically-resistant polymers, nickel and stainless steel.
03/2021 - ©Edwards Limited
Page 12A65201880_AA
A65201880_AA - Introducon

Edwards RV3 Specifications

General

Brand	Edwards
Model	RV3
Category	Water Pump
Language	English