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NSN 4820-00-879-3574

Velocity Fuse

About this product

0.750 inches all ends pipe size accommodated, poppet flow control device, inside spring bonnet type, bonnet attachment method: integral.

Manufacturer part number 642B-3-3/4-2 for national stock number 4820008793574.

Datasheet

  • Product description

    Safety Relief Valve NSN 4820-00-879-3574.

  • MPN or Model

    642B-3-3/4-2

  • Schedule B
    8481.40.0000 (Safety or relief valves)
  • NMF (National Motor Freight)
    051080 - Faucets, Bibcocks, Gates Valves
  • Pipe Size Accommodated
    0.750 inches all ends
  • Thread Direction
    Right-hand all ends
  • Flow Control Device
    Poppet
  • Bonnet Type
    Inside spring
  • Bonnet Attachment Method
    Integral
  • Disk Loading Method
    Spring
  • Maximum Operating Temp
    225.0 degrees fahrenheit single response
  • Connection Style
    G9 plain, optional en (pipe) all ends
  • Valve Operation Method
    Automatic
  • Connection Type
    Threaded internal pipe all ends
  • Features Provided
    Valve stem lock shield and bonnet packing and pressure tight outlet side
  • Adjustable Pressure Range
    +40.0/+125.0 pounds per square inch
  • Maximum Operating Pressure
    125.0 pounds per square inch single response
  • Thread Size
    0.750 inches all ends
  • Opening Pressure Setting
    90.0 pounds per square inch
  • Material
    Steel
  • Material Specification
    Fed standard 66, aisi 304l/sae 30304l federal standard single material response
  • Media For Which Designed
    Air 1st response
  • Style Designator
    Err-090
  • Thread Series Designator
    Npt all ends
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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 4820008793574

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
642B-3-3/4-2 Parker-hannifin Corporation
642B3-3-4-2 Teledyne Industries Inc
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