Edwards EXT250 Series, Инструкция по эксплуатации, Страница: 40 / 42

B722-01-880 Issue K
Page 34 © Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Service, Spares and Accessories
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 and may be powered from a rear panel socket on the EXC Controller.
7.4.5 FL20K foreline trap
The foreline trap minimises oil vapour backstreaming from the backing-pump and is recommended where the highest
system cleanliness is required.
7.4.6 TAV vent valve and vent-port adaptor
A solenoid-operated vent-valve is available for system venting. The valve is 24 V d.c., normally-open, and can be
driven automatically from the EXC 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 be used with any suitable NW10 flanged port
on your vacuum system.
An NW10 -
1
/
8
inch BSP male adaptor is also available. This adaptor allows the vent-port to be used with any suitable
NW10 fitting: see Figure 8 , item 13.
7.4.7 ACX air-cooler
An ACX air-cooler can be fitted to all pumps in the EXT range. However, please refer to Section 3.7 to check the
suitability of air-cooling in a particular application.
Pump Bakeout band Item Number
EXT70 BX70 (110 V) B580-52-040
BX70 (240 V) B580-52-060
EXT250 BX250 (110 V) B580-52-041
BX250 (240 V) B580-52-061
Foreline trap Item Number
FL20K A133-05-000
Product Item Number
TAV5 vent-valve B580-66-010
NW10 -
1
/
8
inch male adaptor B580-66-011
Pump Air-cooler Item Number
EXT70 ACX70 B580-53-050
EXT250 ACX250H B580-53-160