NSN 4820-00-490-6714
Velocity Fuse
About this product
Poppet flow control device, spring disk loading method, plain, optional en (pipe) 1st end connection style, valve operation method: automatic.
Manufacturer part number 646B-1-1/2-2 for national stock number 4820004906714.
Datasheet
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Product description
Safety Relief Valve NSN 4820-00-490-6714.
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MPN or Model
646B-1-1/2-2
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Schedule B
8481.40.0000 (Safety or relief valves) -
NMF (National Motor Freight)
127220 - Pressure Reg/red/relief Valves NOI -
Thread Direction
Right-hand 1st end -
Flow Control Device
Poppet -
Disk Loading Method
Spring -
Maximum Operating Temp
225.0 degrees fahrenheit single response -
Connection Style
Plain, optional en (pipe) 1st end -
Valve Operation Method
Automatic -
Connection Type
Threaded internal pipe 1st end -
Adjustable Pressure Range
+4.0/+15.0 pounds per square inch -
Maximum Operating Pressure
3600.0 pounds per square inch single response -
Thread Size
0.500 inches 2nd end -
Material
Stainless steel flow control device -
Media For Which Designed
Hydraulic fluid, petroleum base 2nd response -
Style Designator
Angle -
Thread Series Designator
Npt 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](/public/images/billy-thinking.png)
Pricing and Availability
Get a quote for 4820-00-490-6714 safety relief valveManufacturer Part Numbers and Alternates
MPN manufacturer part number | Registrant or Supplier |
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646B-1-1/2-2 | Parker-hannifin Corporation |
646B1 1-2 2 | Teledyne Industries Inc |
Stock Check
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