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NSN 4820-01-121-8903

Velocity Fuse

About this product

Mounting position: horizontal or vertical.

Manufacturer part number 220T4TB for national stock number 4820011218903.

Datasheet

  • Product description

    Safety Relief Valve NSN 4820-01-121-8903.

  • MPN or Model

    220T4TB

  • Schedule B
    8481.40.0000 (Safety or relief valves)
  • NMF (National Motor Freight)
    051080 - Faucets, Bibcocks, Gates Valves
  • Thread Class
    3b 2nd end
  • Thread Direction
    Right-hand all ends
  • Flow Control Device
    Poppet
  • Maximum Operating Temp
    400.0 degrees fahrenheit single response
  • Connection Style
    G4 gasket sea (boss) 2nd end
  • Valve Operation Method
    Automatic
  • Connection Type
    Threaded internal tube 2nd end
  • Thready Qty Per Inch (tpi)
    20 1st end
  • Maximum Operating Pressure
    3000.0 pounds per square inch single response
  • Thread Size
    0.438 inches all ends
  • Seat Angle
    90.0 degrees 1st end
  • Outside Diameter Tube Accommodated
    0.250 inches 2nd end
  • Material
    Steel comp 303 body
  • Style Designator
    C2 straight thru
  • Thread Series Designator
    Unj 1st end
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Safety Relief Valve

A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes valve (1), relief, pressure and temperature.

Mechanic Bill explains Velocity Fuse

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NSN 4820011218903

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
220T4TB Circor Aerospace, Inc.
Stock Check
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