Edwards nEXT240 User Manual

© Edwards Limited 2009. All rights reserved. Page 71
Edwards and the Edwards logo are trademarks of Edwards Limited.
Service, spares and accessories
B800-00-880 Issue A
7.4.3 WCX water-cooler
A water-cooler can be fitted to the nEXT pump refer to Section 2.5 to check the suitability of the cooling-water
supply.
7.4.4 BX bakeout band
A BX bakeout band accelerates the degassing of the pump to enable it to achieve lower pressures. It may also be used
to protect the pump from condensation of contaminants. The bakeout bands are available in 110 – 120 V or 220 – 240
V versions.
Note: The bakeout band is only for use with CF variants
7.4.5 TAV vent-valve and vent-port adaptor
Two solenoid-operated vent-valves are available for system venting. The valves are 24 V d.c., normally-open and can
be driven by the Controller. The solenoid-valve is fitted in place of the manual-valve, or alternatively can be fitted
with an adaptor (supplied with the valve) and can be used with any suitable NW10 flanged port on your vacuum
system.
TAV5 is suitable for smaller vacuum systems. TAV6 has a higher conductance and is suitable for larger vacuum systems
(typically with volume greater than 10 litres).
7.4.6 VRX vent-restrictor
Use a VRX fixed orifice vent-restrictor to restrict flow of vent gas into the pump. You can fit a VRX vent-restrictor to
the inlet of a TAV5 or TAV6 vent-valve or to a PRX10 purge-restrictor. Refer to Table 21 for information on the
selection of the correct VRX vent-restrictor and to Table 32 for the item numbers of the vent-restrictors available.
ACX nEXT Radial Fan B80000820
ACX nEXT Axial Fan B80000819
ACX nEXT Radial Fan (with Phoenix connector) B80000818
ACX nEXT Axial Fan (with Phoenix connector) B80000817
Water-Cooler Item Number
WCX nEXT water cooling kit B800-00-815
Bakeout Band Item Number For use with
BX250 (110 V) B580-52-041 nEXT240
BX250 (240 V) B580-52-061 nEXT240
BX300 (110 V) B800-00-814 nEXT300
BX300 (240 V) B800-00-816 nEXT300
BX450 (110 V) B580-52-043 nEXT400
BX450 (240 V) B580-52-063 nEXT400
Product Orifice Diameter Item Number
TAV5 vent-valve 0.5 mm B580-66-010
TAV6 vent-valve 1.0 mm B580-66-020
Table 32 - Vent restrictors
Vent-restrictor Orifice diameter (mm) Item number
VRX10 0.1 B580-66-021

Edwards nEXT240 Specifications

General

Brand	Edwards
Model	nEXT240
Category	Water Pump
Language	English