Backing/Roughing Valves
Easy to operate
both ports closed position
Long life
100,000 operations or more
Position indicator
on pneumatic valve
Leak tight
to better than 10-9mbar l/s
Special versions
Chemical & Gas Recirculation variants
Edwards backing/roughing valves with ISO NW roughing and forepump terminations feature manual or pneumatic actuation. They combine the function of separate backing/roughing valves in one integral 3 port unit.
A flexible neoprene connector is supplied for the backing connection. The roughing and forepump ports terminate in the appropriate NW termination
Technical Data
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| BRV10K | BRV10PK | BRV25K | BRV25PK | ||
| Leak rate | mbar l/s | <10-9 | <10-9 | <10-9 | <10-9 |
| Max baking temperature (pneumatic) | °C | 70 | 70 | 70 | 70 |
| Max baking temperature (Manual) | °C | 90 | 90 | 90 | 90 |
| Reliability MTTF | cycles | 100000 | 100000 | 100000 | 100000 |
| Recommended air pressure | bar | 2.8 - 4.2 | 2.8 - 4.2 | 2.8 - 4.2 | 2.8 - 4.2 |
| Weight (Stainless Steel) | g | 350 | 380 | 860 | 900 |
