634 & 634M

Fisher Types 634 and 634M high-pressure shut-off valves serve to provide overpressure protection by containment. Type 634 shut-off valve with internal registration is installed between a pressure reducing regulator and a downstream system or equipment. Type 634M shut-off valve with external registration requires a control line and is installed upstream of a pressure reducing regulator.
Type 634 & 634M Shutoff Valves

  • Overpressure Protection without Discharge of Gas
  • Positive Shutoff
  • Application Versatility
  • Easy Maintenance

 634 Series