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NSN 4820-01-051-8215

Velocity Fuse

About this product

Poppet flow control device, spring disk loading method, g46a plain (tube) 1st end connection style, valve operation method: automatic.

Manufacturer part number 3978-5-50 for national stock number 4820010518215.

Datasheet

  • Product description

    Safety Relief Valve NSN 4820-01-051-8215.

  • MPN or Model

    3978-5-50

  • Schedule B
    8481.40.0000 (Safety or relief valves)
  • NMF (National Motor Freight)
    127220 - Pressure Reg/red/relief Valves NOI
  • Thread Class
    3a 1st end
  • Thread Direction
    Right-hand 1st end
  • Flow Control Device
    Poppet
  • Disk Loading Method
    Spring
  • Maximum Operating Temp
    250.0 degrees fahrenheit single response
  • Connection Style
    G46a plain (tube) 1st end
  • Valve Operation Method
    Automatic
  • Connection Type
    Threaded external tube 1st end
  • Adjustable Pressure Range
    +25.0/+75.0 pounds per square inch
  • Maximum Operating Pressure
    200.0 pounds per square inch single response
  • Thread Size
    0.563 inches 1st end
  • Opening Pressure Setting
    50.0 pounds per square inch
  • Material
    Rubber butadiene-acrylonitrile class nbr seat
  • Material Specification
    Qq-a-225/6 federal specification single material response body
  • Media For Which Designed
    Helium 5th response
  • Surface Treatment
    Anodize
  • Surface Treatment Specification
    Mil-a-8625a type i military specification single treatment response
  • Style Designator
    Err-090
  • Thread Series Designator
    Unjf 1st end
  • Furnished Items And Quantity
    1 deflector cap
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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 4820010518215

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
3978-5-50 Howell Laboratories, Inc.
D559A-6D-50 Circor Aerospace, Inc.
3978 Howell Laboratories, Inc.
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