Edwards iXH100 Instruction Manual page 38

M561-00-880 Issue C
Use a catchpot to prevent the drainage of condensate back into the system. Condensate that drains back into
the system could damage the pump.
Do not reuse any O-ring or O-ring assembly and do not allow debris to get into the system during installation.
When you connect your pumping system to your vacuum system, take note of the following:
To get the best pumping speed, ensure that the pipeline which connects the vacuum system to the pumping

system is the minimum length possible and has an internal diameter not less than the system inlet-port.
Ensure that all components in the vacuum pipeline have a maximum pressure rating which is greater than the

highest pressure that can be generated in your system.
Incorporate flexible pipelines in the vacuum pipeline to reduce the transmission of vibration and to prevent

loading of coupling-joints. We recommend that you use Edwards braided flexible pipelines.
For T variants and systems containing the iXH450H and iXH500H dry pumps, ensure that exhaust pipelines are

rated for 160 °C at the point of connection to the pump. For all other pump variants, ensure that pipelines
are rated for 110 °C. Edwards recommends the use of metal seals at any joint where the continuous
operating temperature of the exhaust is greater than 160 °C.
Adequately support vacuum/exhaust pipelines to prevent the transmission of stress to pipeline

coupling-joints.
Incorporate a pressure gauge in the inlet pipeline, so that you can determine that the dry pumping system

operates correctly.
You must be able to isolate the dry pumping system inlet from the atmosphere and from your vacuum system

if you have pumped or produced corrosive chemicals.
The outlet of the iXH and iXL exhaust pipe can have a check-valve fitted which prevents the suck-back of

exhaust vapours after the pumping system is shutdown. The check-valve also provides additional attenuation
of the pulses in exhaust pressure.
On very dusty applications, use a low-impedance inlet-filter to minimise damage to the pump.

1. Referring to Figure 7, remove the temporary cover or blanking plate from the inlet of the pumping system. Take
care not to drop screws, tools etc into the pump inlet. Retain the nuts, bolts, washers and blanking plate for
future use. Retain the temporary cover for future use on non-contaminated pumps only. The inlet O-ring is
supplied with the pump, it is fitted underneath the inlet flange cover.
2. Use the O-ring supplied and suitable nuts, bolts and washers (not supplied) to connect the inlet-flange
(Figure 3, item 5) to your vacuum system. The inlet flange is not designed for use with a trapped O-ring or
centering ring. Use Edwards half claw clamps when connecting an ISO style foreline flange to the pumping
system inlet. Refer to
3. For iXH and iXL use the trapped O-ring seal and clamp supplied to connect the exhaust outlet
on the exhaust pipe, to your exhaust extraction system. For pXH systems, the exhaust connection is situated
underneath the product.
Note: The system is supplied with either a trapped O-ring or a metal seal depending on pump type and anticipated
exhaust temperatures. Ensure that you always replace seals with the same type.
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Figure 7.
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© Edwards Limited 2012. All rights reserved.
(Figure 4, item 17)