Complete pump protection in sophisticated areas

Record of reliability

The RZN has an excellent record of reliability in critical applications where other check valves have failed.

The duo-eccentrically mounted disc is hydrodynamically designed for low pressure loss and freedom from jamming at the seat. The special ADAMS damping system ensures tight and progressive shut-off against reverse flow and offers long service life.


  • Complete pump protection
  • Low flow loss
  • Progressive sealing system
  • Axial pressure balanced shaft seals for low friction
  • Auto-closing
  • Damper adjustment locking
  • Additional screw safety device
  • Prepared for retro-fitting of counterweights if flow conditions change


  • Damping system for opening
  • Flow control valves
  • Disc locking device, mansafe design
  • Additional counterweight
  • Vulcanized hard rubber coating
  • Butt weld ends


  • Non-return valve with controlled, non-slam closure
  • Resilient seal or laminated metal-to-metal seal
  • Triple offset design with inclined conical sealing system
  • Adjustable hydraulic damping system, located externally and separated from the media


ADAMS Product range

Hydrogen brochure