Connect The Outlet To Your Exhaust Extraction System - Edwards EPX HiVac Series Instruction Manual

When you connect the pump to the process system:
The vacuum system and foreline assembly MUST NOT be supported by the EPX Pump. The foreline assembly
should be supported by the vacuum system and connected to the EPX pump inlet by a flexible connection to
reduce vibration and stress in the system pipelines.
Use a flexible connection in the pipeline from the process system to the pump to reduce vibration and stress in
the system pipelines.
To get the best pumping speed, ensure that the pipeline which connects the process system to the pump is as
short as possible and has an internal diameter not less than the pump inlet.
Do not allow debris to get into the pump during installation. Ensure that debris (such as weld slag) cannot get
into the pump during operation.
If necessary, contact Edwards or your supplier for advice on inlet isolation valves or other components
suitable for your application and system design.
The EPX180 and EPX500 pumps are supplied with a clear plastic protective cap on the inlet flange. The cap prevents
debris entering the pump during transit and protects the inlet flange from scratches.
The plastic cap must be removed prior to installation and operation of the pump.
Connect the inlet flange to a foreline or inlet reducing adapter, using an Edwards centring O-ring and claw clamps
(Refer to Section 2.1 for details of fittings).
A centring O-ring must be used to seal the inlet flange and retain the inlet screen.
3.5

Connect the outlet to your exhaust extraction system

Pipe the exhaust to a suitable treatment plant to prevent the discharge of dangerous gases or
vapours to the surrounding atmosphere.
Do not incorporate check-valves or one-way valves in the exhaust pipeline. If you do, the EPX pump will not
operate correctly and may be damaged.
Install an outlet catchpot to prevent the drainage of condensate back into the pump. If you do not, condensate
which drains back into the pump may damage it or cause it to seize.
It is essential that on the EXP Twin pump, both exhaust ports are connected to a suitable exhaust system.
Note: If your exhaust extraction system is unrestricted, and so cannot be sealed for leak test purposes, you must
leak test the system (refer to
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CAUTION
CAUTION
WARNING
CAUTION
CAUTION
CAUTION
Section 3.7) before you connect the pump outlet.
A419-00-880 Issue F
Page 29