M&S Non-return valves

M&S non-return valves are used in process engineering plants to prevent the flow reversal of fluids (liquids or gases) in pipelines.

For example, they prevent the liquid column in a riser pipe from flowing back if a feed pump fails.

For dosing tasks or the merging of fluids, in the event of a pressure difference, penetration into the pipeline with the lower pressure is prevented.

M&S non-return valves are available as between flanges type or screwed type.

Usage

To prevent the reversal of flow
- for liquids in rising pipes
- when combining liquid or gaseous media or dosing, especially with pressure differences in the pipelines.
To prevent idling of pipelines or pumps.

Installation in vertical and horizontal pipelines
Low pressure loss
Reliable and robust design
With unbreakable spring even with frequent operations
With external marking for flow direction
Between flanges type for easy disassembly even in rigid pipelines
Special versions on request
- NRV MW with screwed-in O-ring in the valve disc (for use with high flow velocities or vacuum)
- NRV MW with double bearing of the valve shaft ( for hight switching frequency in horizontal installation)