Sander Marine GmbH&Co.KG

D-28279 Bremen

Phone +49 (0)421 48603-0
Fax  +49 (0)421 48603-89



Prospekt Sandwich-Rückschlagklappen

 Sandwich check valves (276 KB)

Our Sandwich check valves for fastening between flanges are available in optimized design.

Caused by the new constructed fixture from the flap they are in higher performance and provide a better function.



  • small total length
  • low weight
  • tight closing at low difference pressure
  • After utilization the elasticity of O-ring remains tightness metal/metal
  • standard equipment with adjustment for flap
  • eye bolt
  • for fastening between flanges acc. to DIN
  • universal application for gaseous or liquid mediums, in oil-, air-, gas- and water systems also used in the chemical industry
  • available in the material bronze, steel and AlBz with flap material CuAl, steel and stainless steel
  • available with and without spring


Technical data:

  • Nominal diameter: DN   40 up to DN 500
  • Working pressure: DN   40 up to DN 200   PN16
  • DN 250 up to DN 300   PN 10 / 16
  • DN 350 up to DN 500   PN 10
  • Betriebstemperaturen: NBR:   -40°C up to +100°C
  • FKM:   -30°C up to +200°C
  • PTFE: -50°C up to +260°C


Special designs:

  • metal/metal sealing
  • for fasteing between flanges acc. to ANSI, JIS


Further design are possible !  Please contact us !