© Edwards Limited 2008. All rights reserved.
Page 1
Edwards and the Edwards logo are trademarks of Edwards Limited.
Introduction
A505-23-880 Issue D
1
Introduction
1.1
Scope and definitions
This manual provides installation, operation and maintenance instructions for the Edwards EMF Gas Ballast Oil Drain
Kit for RV
3
to RV12 Pumps. You must use the Oil Drain Kit as specified in this manual. Read this manual before you
install and operate the Oil Drain Kit.
1.2
Description
Note:
In normal operation, oil will not be visible in the sight-glasses of the oil mist filter.
The Oil Drain Kit is designed for use with an RV3, RV5, RV8 or RV12 pump (fitted with an EMF oil mist filter) which
operates continuously with gas ballast switched on. You cannot use the Oil Drain Kit if you want to introduce a purge
gas into the RV pump. If you want to introduce a purge gas into the RV pump, you must
fit
a Gas Ballast Adaptor to
the pump (refer to the RV pump instruction manual) and oil cannot be returned from the pump.
When fitted, the Oil Drain Kit continususly returns oil trapped in the oil mist filter to the pump. This reduces oil loss
from the pump and minimises the need to check the pump oil-level and to refill the pump with oil.
At high inlet pressures (above 200 mbar, 2 x 10
4
Pa), the Oil Drain Kit will not work correctly. If you want to return
oil to the pump when the pump is operated at high inlet pressures, contact your supplier or Edwards for advice.
The Oil Drain Kit is not suitable for use with an RV pump which is used in hazardous processes.