VEGA Mounting accessories, pressure measurement technology - Manual (Page 12)

The scope of delivery encompasses:
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Double blocking valve
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This supplementary instructions
Feature Feature
Art. no. BARVALVE.F …
Material housing 316Ti
Material valve seal packing PTFE
Input Pin ½ NPT
Output Sleeve ½ NPT
Ventilation/Test connection ¼ NPT , with closing screw
Pressure stage/Max. permissible
pressure PN 420/420 bar
Max. permissible pressure at 80 °C 420 bar
Max. permissible pressure at 200 °C 320 bar
Temperature max. 200 °C
Weight approx. 0.9 kg
Rust, sand or similar pollution int he medium, especially when rinsing
the system before the first setup, can cause buildup around the valve
seat. This can cause leakage of the valve seat.
When the prepressed packing is stored for a longer time, its sealing
ability can deteriorate. If necessary, the seal must be retightened at the
time of setup. The procedure is described in chapter "Maintenance
and fault rectification".
5 .3 Double blocking valve according to DIN 16272
The double blocking valve according to DIN 16270 enables simple
mounting, setup and dismounting of a pressure transmitter with
process fitting G½.
The process valve separates the pressure transmitter from the
process. The ventilation/test valves enables two functions with closed
process valve:
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Ventilation of the pressure transmitter
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Checking the pressure transmitter via a connected pressure
calibrator.
Scope of delivery
Technical data
Mounting and setup in-
structions
Storage
Application area/Func-
tion
12 Mounting accessories, pressure measurement technology
5 Blocking valves
43478
-EN
-121018