© Edwards Limited 2013. All rights reserved. Page 65
Edwards and the Edwards logo are trademarks of Edwards Limited.
Service, spares and accessories
B722-40-880 Issue F
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 Podule. 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 the 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. A VRX vent restrictor can be fitted
to the inlet of a TAV5 or TAV6 vent valve or to a PRX10 purge restrictor. Refer to Table 19 for information on the
selection of the correct VRX vent restrictor and to Table 29 for the item numbers of the vent restrictors available.
7.4.7 Vent port adaptor
The vent port adaptor has a 1/8 inch BSP male thread that can be screwed into both the vent port and purge port,
making them suitable for NW10 fittings.
Bakeout Band Item Number For use with
BX70 (110 V, 30 W) B580-52-040 EXT75DX
BX70 (240 V, 30 W) B580-52-060 EXT75DX
BX250 (110 V, 30 W) B580-52-041 EXT255DX
BX250 (240 V, 30 W) B580-52-061 EXT255DX
Product Orifice Diameter Item Number
TAV5 vent valve 0.5 mm B580-66-010
TAV6 vent valve 1.0 mm B580-66-020
Table 29 - Vent restrictors
Vent restrictor Orifice diameter (mm) Item number
VRX10 0.1 B580-66-021
VRX20 0.2 B580-66-022
VRX30 0.3 B580-66-023
VRX50 0.5 B580-66-024
VRX70 0.7 B580-66-025
Vent port adaptor Item Number
Vent Port adaptor NW10 -1/8 inch BSP male B580-66-011
To Next Page
Loading...
Need help?
General
