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NSN 4820-00-552-3498

Velocity Fuse

About this product

Poppet flow control device, spring disk loading method, gasket sea (boss) all ends connection style, valve operation method: automatic.

Manufacturer part number 645B-6-12-T for national stock number 4820005523498.

Datasheet

  • Product description

    Safety Relief Valve NSN 4820-00-552-3498.

  • MPN or Model

    645B-6-12-T

  • Schedule B
    8481.40.0000 (Safety or relief valves)
  • NMF (National Motor Freight)
    127220 - Pressure Reg/red/relief Valves NOI
  • Unit Weight (Est.)
    2 lb
  • Thread Class
    3b all ends
  • Thread Direction
    Right-hand all ends
  • Flow Control Device
    Poppet
  • Disk Loading Method
    Spring
  • Maximum Operating Temp
    400.0 degrees fahrenheit single response
  • Connection Style
    Gasket sea (boss) all ends
  • Valve Operation Method
    Automatic
  • Connection Type
    Threaded internal boss all ends
  • Features Provided
    Pressure tight outlet side
  • Thready Qty Per Inch (tpi)
    12 all ends
  • Adjustable Pressure Range
    +430.0/+650.0 pounds per square inch
  • Maximum Operating Pressure
    3100.0 pounds per square inch single response
  • Thread Size
    1.062 inches all ends
  • Opening Pressure Setting
    550.0 pounds per square inch
  • Outside Diameter Tube Accommodated
    0.750 inches all ends
  • Material
    Steel comp 303 seat
  • Media For Which Designed
    Water-oil-gas single response
  • Surface Treatment
    Passivate
  • Style Designator
    Angle
  • Thread Series Designator
    Unj all ends
More from these suppliers
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 4820005523498

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
645B-6-12-T Parker-hannifin Corporation
645B6-12T Teledyne Industries Inc
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