B800-00-880 Issue A
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Service, spares and accessories
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.
7.4.8 PRX purge-restrictor
The PRX10 is a modified DN10NW centring-ring that filters the purge gas and restricts its flow rate to the
recommended flow of 25 sccm. You must fit a vent-port adaptor to the purge-port in order to connect a purge-
restrictor to the pump.
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
Item Item Number
PRX10 purge restrictor B580-65-001
Table 32 - Vent restrictors
Vent-restrictor Orifice diameter (mm) Item number