Check valve RZI

Proven design

The proven design of the RZN is the basis for check valve RZI, which can be installed in large-diameter or high-pressure pipelines and are equipped with a multirate, adjustable, interval-damping system for particularly critical applications.

The check valve RZI provides adjustment for each damping rate and also timing-of-rate increase during check valve closure.This means, the RZI can be tuned to precisely match the closing characteristics required by a pump installation to avert excessive pressure surge.


  • Controlled, non-slam closure
  • Adjustable closing characteristic
  • Additional screw safety device
  • Prepared for retro-fitting of counterweights, if flow conditions change
  • Longevity, even for frequent cycle operation


  • Damping system for opening
  •  Pneumatic or hydraulic power pack for positive operation
  • Disc locking device, mansafe design
  • Additional counterweight
  • Vulcanized hard rubber coating
  • Butt weld ends

Features of the check valve RZI

  • Non-return valve with multirate adjustable interval damping system
  • Resilient seal or laminated metal-to-metal seal
  • Triple offset design with inclined conical sealing system
  • Three adjustable independent damping rates
  • Auto-closing
  • Damper adjustment locking


ADAMS Product range

Hydrogen brochure