Fisher A31A Kryogen högpresterande vridspjällsventil

Fisher A31A Kryogen högpresterande vridspjällsventil

Fisher™ A31A kryogen högpresterande vridspjällsventil är konstruerad för extremtemperatur, kryogena tjänster och har en ventilhusförlängning som placerar packningssystemet och ställdonet bort från extrema temperaturer. Ventilen har också en NOVEX-tätning i metall som ger täta avstängningar, låga moment och den robusta hållbarheten som behövs för kryogen service.

Certifications PED, CRN, Fugitive Emission
Critical Service General Service
Flow Characteristics Linear
Material Carbon Steel, Stainless, Alloy
Operating Temperature Cryogenic, Standard Temperature, High Temperature
Power Source Electric, Hydraulic, Pneumatic, Lever, Gear, Electro-Hydraulic
Pressure Class ASME
Process Connection Type Flanged, Single Flanged, Double Flanged, Lugged, Wafer
Seat / Seal Type Metal, Soft
Shutoff Class Class VI (FCI 70-2)
Standards B16.34
Stem Live Loaded, Adjustable Packing
Valve Size NPS 3, NPS 4, NPS 6, NPS 8, NPS 10, NPS 12, NPS 14, NPS 16, NPS 18, NPS 20, NPS 24
Valve Size Standard NPS
  • Developed as a valve/actuator packing with a double D drive shaft to allow easy, direct mounting to a rack and pinion actuator, eliminating the need for external coupling systems.
  • Concentric rotation ensures that the valve disk remains in the closed position, even in the event of line pressure surges or actuator failure.
  • The torque necessary to open and close the valve is the same, regardless of the direction in which the differential pressure is applied.
  • Interchangeability of all parts, including shafts and disks, simplifies service and reduces maintenance costs.
  • Seal retainer screws are located so there is no interference with the sealing function of either flat sheet or spiral-wound line flange gaskets.
  • The valve body self-centers on the line flange bolts as a fast, accurate means of centering the valve in the pipeline.

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