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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