Edwards nEXT730 - VRX Vent Restrictor; Vent Port Adaptor; PRX Purge Restrictor

B8J200880_E - Accessories
Page 125
TAV5 vent valves have an 0.5 mm diameter orifice and are suitable for venting small
vacuum systems of < 5 litres. TAV6 vent valves have an 1.0 mm diameter orifice and are
suitable for venting bigger vacuum systems.
The vent valves are pre-wired to Vent Option 1 and that the default is set to fully vent at
50% (option 0). 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 the vacuum system. The vent port adaptor allows the vent port or
the purge port to be used with any suitable NW10 fitting.
Table 41 TAV vent valve and vent port adaptor
Product
Item Number
nEXT TAV5 kit N/C connector fitted (0.3 m)
B8G200835
nEXT TAV5 kit N/C bare wire (3 m)
B58066040
nEXT TAV5 kit N/O connector fitted (0.3 m)
B8G200834
nEXT TAV5 kit N/O bare wire (3 m)
B58066010
nEXT TAV6 kit N/O bare wire (3 m)
B58066020
14.5 VRX vent restrictor
Use a VRX fixed orifice vent restrictor to restrict the flow of vent gas into the pump.
Table 42 VRX vent restrictor
Vent restrictor
Orifice diameter (mm)
Item number
VRX10
0.1
B58066021
VRX20
0.2
B58066022
VRX30
0.3
B58066023
VRX50
0.5
B58066024
VRX70
0.7
B58066025
14.6 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.
Table 43 Vent port adaptor
Vent port adaptor
Item Number
Vent port adaptor NW10 - 1/8
inch BSP male
B58066011
14.7 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. A vent port adaptor must be fitted to
the purge port in order to connect a purge restrictor to the pump.