Edwards EXT200/200H GCMS, Instruction Manual, Page: 22 / 38

B756-01-880 Issue K
Page 16 © Edwards Limited 2013. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Installation
3.3.2 Inlet screens (supplied fitted) or integral mesh centering ring (supplied separate
from the pump)
Remove the inlet screens only if there is no possibility that debris can fall into the pump. If the screens are removed,
the pumping speed through each inlet will increase by approximately 10%.
To remove an inlet screen, carefully extract it from the inlet flange using a bent wire hook. To replace a screen which
has been removed, install it as shown in
Figure 6 , with the Edwards logo uppermost. Ensure that the dimples on the
rim of the screen engage in the groove in the pump flange. If necessary, gently bend the tabs of the screen outwards
to ensure a tight fit.
Figure 6 - Correct installation of inlet screen
3.3.3 Inlet connection and orientation
I
f integral mesh centering rings are supplied with the pump, appropriate care must be taken when handling the pump
to avoid the exposed impeller blades. The impeller represents a serious rotational hazard if the pump is operational
and a manual handling hazard if the pump impeller is stationary.
Integral mesh centering rings have not been designed to enable the inlet screen to be removed. If the inlet screen is
removed, it will probably become damaged and non re-usable. If the screen is not required, a plain centering ring
(B271-58-171 for DN100ISO-K inlet) can be used instead.
CAUTION
Do not invert the pump.
The pump can be mounted in any attitude range shown in Figure 7 , from vertical and upright through to horizontal
( ± 2°), although it is most commonly mounted vertically. If the pump is mounted horizontally, the backing port should
point vertically downwards ( ± 20°) to reduce the risk of contamination from the backing pump oil.
Make sure that the pump’s main inlet and side inlet and all components fitted to the pump inlets are clean and dust-
free. If the pump inlets are not kept clean, the pump-down time may be increased.
The inlet connections of the EXT Split Flow Pump are ISO flanges.
WARNING
Removal of inlet screens will expose the risk of injury from sharp edges.
WARNING
In the unlikely event of a pump fracture, it is possible that the inlet screen may not trap all debris
within the pump. Ensure that the system can contain any debris that may escape from the pump.
1. Inlet flange
2. Inlet screen