Fisher Natural Gas – Shutoff Devices

Shutoff Devices
•    634 Series
•    OSE

 

634 Series High-Pressure Shutoff Valve

 

 

 

 



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

 

Features

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

Body Sizes and End Connection Styles

  • 3/4 or 1-inch NPT Screwed

Maximum Inlet Pressure

  • 1500 psig (103 bar)

Maximum Outlet (Casing) Pressure

  • Type 634: 150 psig (10,3 bar)
  • Type 634M: 1500 psig (103 bar)

Pressure Registration

  • Type 634: Internal
  • Type 634M: External

Temperature Capabilites

  • -40 to 180°F (-40 to 82°C)

Options

  • One bleed valve in side tapping in upstream half of body
  • Two bleed valves in side tappings in both upstream and downstream halves of body

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Type OSE Slam-Shut Valve




The purpose of the Type OSE slam-shut device is to totally and rapidly cut the flow of gas when the inlet and/or outlet pressure in the system either exceeds or drops below setpoints. The Type OSE consist of a valve, either mechanism box, BM1 or BM2, and either one or two manometric sensing devices (BMS1 or BMS2).

 

 

 

  • Overpressure and underpressure protection
  • Two-stage tripping mechanism
  • Internal bypass valve
  • High accuracy
  • Easy in-line maintenance
  • Water tight
  • Positive shutoff

Body Size and End Connection Style

  • WCB Steel
    • 1 and 2-inch (DN 25 and 50) NPT screwed
    • 1, 2, 3, 4, and 6-inch (DN 25, 50, 80, 100, and 150) ANSI Class 150 RF, 300 RF, or 600 RF
  • Cast Iron
    • 1 and 2-inch (DN 25 and 50) NPT screwed
    • 1, 2, 3, 4, and 6-inch (DN 25, 50, 80, 100, and 150) ANSI Class 125 FF, 250 RF

Maximum Relief (Inlet) Pressure

  • 1470 psig (100 bar) or maximum body rating, whichever is lower.

Maximum Set Pressure

  • 1470 psig (100 bar) or maximum body rating, whichever is lower

Minimum Set Pressure

  • 4.02-inches w.c. (10 mbar)

Maximum Shutoff Pressure Differential

  • 1470 psig (100 bar) or maximum body rating, whichever is lower.

Pressure Registration

  • External

Maximum Temperature Capabilities

  • -20° to 150°F (-29° to 65°C)

Pressure Sensing Connections

  • 1/4-inch NPT screwed

Vent Connection

  • 3/8-inch NPT

Construction Materials

  • Body: Steel or Cast Iron
  • Bonnet: Steel
  • Valve Plug: 304L Stainless Steel
  • Valve Plug Seal O-Ring: Nitrile (NBR)
  • Seat Ring: 304L Stainless steel
  • Mechanism Box: Aluminum
  • First and Second State Mechanism: Steel
  • Diaphragm: Reinforced Nitrile
  • Bellows: S31600 Stainless Steel
  • Piston: S31600 Stainless Steel

Options

  • Explosion-proof switch
  • Non-explosion-proof limit switch
  • Solenoid
  • Additional manometric device for extra pressure sensing

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