Products Check valve FCV

Constant Evolution

The check valve FCV is a robust valve with low inertia moving parts to withstand very fast closure with complete reliability. The inclined tilting disc design ensures inherent gravity closure, stable operation, low pressure loss, and fast response.

This check valve has continually evolved through many years experience with large steam turbines and compressors. On loss of load, steam turbines risk rapid acceleration due to the stored energy in the feed heating system. Steam flow reversal can occur in less than 0.2 seconds. Compressors have a similar problem when emergency shut down may lead to rapid flow reversal. These occasions cause very high impact forces on check valve closure thus necessitating the special design features of ADAMS FCV valves.

A variety of control sytems

The check valve FCV can be supplied with a variety of control sytems and accessories to suit customer requirements. Where power assisted closure is specified, this will usually be by a direct acting pneumatic hydraulic or spring-return actuator operating via a pad, avoiding the friction of a shaft seal. Body and disc are of forged or fabricated steel. The seat and disc tips are hard-faced. The ADAMS exclusive inclined cone seal system guarantees freedom from jamming, positive shut-off, and long life with low maintenance requirements.


  • Robust forged steel construction
  • Outstanding sealing characteristics at both high and low operating pressures
  • Short closing distance
  • Absorbs high dynamic forces
  • No jamming at seat
  • Low internal friction
  • No internal bolted joints
  • Minimal maintenance; also possible on site
  • Absolute operating reliability at high closing frequencies


  • Inspection/mounting port
  • Internal steam heating
  • Accessories for remote control
  • Flanged design
  • Power assisted closure by direct acting pneumatic, hydraulic, mechanical or spring-return actuator

Features of the check valve FCV

  • Ultra-fast closing non-return valve
  • Triple offset design with inclined conical sealing system
  • Optimum flow opening characteristics
  • Inherent gravity closure
  • Low inertia
  • All parts designed to tolerate high impact
  • Fast response
  • Butt weld ends (body length: ISO F5)


ADAMS Product range

SCV / FCV brochure