Model NRV-B

• Non-slam closure
• Very low pressure loss
• Friction-free movement of the disc ring
• Metal-to-metal sealing
• Maintenance-free

This non-return valve is available for medium (DN 12") to large sizes (DN 88") and operating pressure up to Class 2500.
NRV-B non-return valves can be used with all gases and fluids.


The exceptional feature of the NRV-B series is the construction of the ring-shaped valve disc, which is guided friction-free by helical springs and guides. This results in the following advantages:

1. Very low pressure loss due to two ring-shaped flow channels.
2. Non-slam closure of the valve disc in a fraction of a second.

Model NRV B