Edwards nEXT400 User Manual

4.3.3 Inlet connecon and orien
taon
The pump can be installed at the vacuum system through the inlet ange. You can
mount the pump in vercal and upright through to horizontal (± 2°). If the pump is
mounted horizontally and used with a rotary vane backing pump, make sure that a
foreline trap is installed to prevent the condensed oil in the backing line from entering in
the turbo pump. If installaon of the foreline trap is not possible, install the pump with
the backing port that points vercally down (± 45°).
Note:
Do not operate the pump in in
verted posion. Refer to Figure: Installaon orientaon.
Figure 12 Installaon orientaon
Make sure that the pump inlet and the components installed to the pump inlet are clean
and dust‑
free. Failure to do so can increase the pump‑down me.
The inlet connecons for the pump are CF ange, ISO ange and VG ange.
▪ If the pump has a CF ange, use the copper compression gasket supplied with the
pump. Use all supplied bolts to connect the inlet ange of the pump to the
vacuum system.
▪ If the pump has an ISO ange, use the manufacturer's combinaon inlet
screen / trapped O‑ring supplied with the pump. Use minimum four claw clamps
(each torqued to 30 Nm) to connect the inlet ange of the pump to the vacuum
system.
You can also use a rotatable collar and the combinaon inlet screen and trapped
O‑ring supplied with the pump to connect the inlet ange of the pump to the
vacuum system. Use all supplied bolts with the rotatable collar.
▪ If the pump has a VG ange, use all supplied bolts of 8 x M10 and w
ashers to
connect the pump to the vacuum system. Flange installaon bolts must have
04/2022 - ©Edwards Limited
Page 41B80000880_G
B80000880_G - Inst
allaon

Edwards nEXT400 Specifications

General

Brand	Edwards
Model	nEXT400
Category	Water Pump
Language	English