Connect The Cooling-Water Supply; Connect The Shaft-Seals Purge And Gas-Ballast Gas Supplies; Introduction - Edwards GV Series Instruction Manual

3.9

Connect the cooling-water supply

Note: The following procedure assumes that you use the GV pump with direct cooling, as supplied. If you want to
use indirect cooling on the GV pump, install the appropriate Indirect Cooling Kit (see
connect to the cooling-water supply as described in the instruction manual supplied with the Kit.
Take note of the following when you connect the cooling-water supply and return pipelines:
If you need to connect more than one GV pump to the water supply, you must connect them in parallel and

not in series.
We recommend that you incorporate a suitable ball-type flow indicator in your water return pipeline, to

provide a visual indication of cooling-water flow through the GV pump.
We recommend that you incorporate a suitable filter in the water supply pipeline, if the water supply

contains particulates.
To prevent damage to the pump in the event of cooling-water supply failure or a blockage in the pump, we

recommend that you incorporate a suitable flow-switch in the cooling-water return pipelines; you can
connect the outputs of the flow-switch to your control equipment to shut down the pump when the cooling-
water flow through the pump is too low.
Connect the cooling-water supply as described below; you must use ½ inch outside diameter pipes for the cooling-
water supply and return pipelines.
1. Refer to Figure 1. Remove the red blanking caps from the cooling-water inlet (6) and outlet compression
connections (2).
2. Remove the ½ inch compression nuts and ferrules from the fittings kit and fit them finger- tight onto the
cooling-water inlet (6) and outlet (2) connections.
3. Fit the end of your cooling-water supply pipeline to the cooling-water inlet compression fitting (6), then tighten
the compression nut to secure the pipeline in place.
4. Fit the end of your cooling-water return pipeline to the cooling-water outlet compression fitting (2), then
tighten the compression nut to secure the pipeline in place.
3.10

Connect the shaft-seals purge and gas-ballast gas supplies

3.10.1

Introduction

You must determine the correct shaft-seals purge and gas-ballast requirements for your application. You must
connect nitrogen supplies to the gas systems if you will pump dangerous gases.
If required for your application, use the procedure in

the shaft-seals purge inlet. As supplied, the gas-ballast system can deliver filtered atmospheric air to the
pump gas-ballast inlet, so you do not need to connect an air supply to the gas-ballast system.
If required for your application, connect nitrogen supplies to the shaft-seals inlet and to the gas-ballast

system. Use the procedures in
inlet and to the gas-ballast system.
© Edwards Limited 2012. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Section 3.10.2
Section 3.10.2 and 3.10.3 to connect nitrogen supplies to the shaft-seals purge
A705-61-880 Issue M
Section
to connect a compressed air supply to
7.4) and
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