STRATE non-return valve RSK

Area of use

The STRATE non-return valve RKS is particularly suitable in areas where the prevention of flap impacts is of particular importance. In this application case the extension of the standard butterfly valve RSK by the additional component STRATE spring load (RSK-FT or RSK-FTU) is required

DN 50 - 350
PN 10
Housing: EN-GJL-250 (GG 25)
Coating: Acrylic combination paint
DN 400 – 1000
PN 6
Housing: RSt 37.2 (welded) Seat ring made of chrome-nickel-steel
Coating: 2 component coating on epoxy resin basis

Product features

  • Product features (STRATE RSK)
  • Wide flap to prevent piercing, especially at high pressure levels
  • Type RSK-FT: Equipped with exterior spring load to more quickly close the flap and avoid flap impact
  • Type RSK-UD: Bypass line with pressure shock damping valve to reduce/avoid pressure shocks
  • Type FTUD: a combination of the above types to optimally protect the pumps in case of a power outage, etc.



About us

STRATE stands for innovative and state-of-the-art wastewater technology since 75 years. The company develops sewage pumping stations with the patented separator system, non-return valves as well as aeration and venting valves of all sizes. In the industrial sector STRATE supplies blower and compressor manufacturers with non-return valves and start-up relief valves for air and technical gases. STRATE Service offers a comprehensive range of services, from new installation and regular maintenance to refurbishment, spare parts sales and the reconstruction of existing stations.


STRATE Technologie für Abwasser GmbH
Im Kirchenfelde 9 
31157 Sarstedt

+49(0)5066 988-0