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Safety Relief Valve

NSN: 4820-00-010-1680 | Model: 21C2222-261

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.

NSN Properties and Flags
NATO Stock Number
4820-00-010-1680
DEMIL
NO
Thread Class
3a 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
Flared (tube) all ends
Valve Operation Method
Automatic
Connection Type
Threaded external tube all ends
Features Provided
Bonnet packing and pressure tight outlet side
Thready Qty Per Inch (tpi)
16 all ends
Adjustable Pressure Range
+10.0 to 50.0 pounds per square inch
Maximum Operating Pressure
50.0 pounds per square inch single response
Thread Size
0.750 inches all ends
Seat Angle
37.0 degrees all ends
Opening Pressure Setting
35.0 pounds per square inch
Outside Diameter Tube Accommodated
0.500 inches all ends
Material
Steel comp 416 flow control device
Material Specification
Fedstd66, aisi416/sae51416 federal standard single material response flow control device
Media For Which Designed
Water-oil-gas single response
Surface Treatment
Passivate
Style Designator
Angle
Thread Series Designator
Unf all ends
Furnished Items And Quantity
2 ferrule

Pricing and Availability

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NSN 4820-00-010-1680 Datasheet

Supply Class (FSC):
Nonpowered Valves
Cross Reference:
  • 21C2222-261
  • A644XB-2-8-2
  • 21C2222-261
  • A644X2-8
  • A644XB2-8-2
  • 21C2222-261
Cage Codes:
  • Janke & Company Inc (CAGE 31682)
  • Hannifin Corporation Parker (CAGE 09990)
  • General Electric Co (CAGE 24446)
  • Teledyne Industries Inc (CAGE 86768)
  • General Electric Company (CAGE 07482)
Schedule B & Trade:
  • Schedule B: 8481400000 (NAICS 332911)

    Safety or relief valves

  • SITC: 74740

    Safety or relief valves

  • End Use: 21180

    Industrial machines, other

Identification:
HMIC

N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

PMIC

A - Item does not contain precious metal.

CRITL

- The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Freight Information:
  • NMFC:

    127220 - Pressure reg/red/relief valves noi

  • WCC:

    576 - Metal and metal products, nos, (less than 35 feet)

  • SHC:

    9 - Other or no special handling required (sh)

  • ADC:

    A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.

  • ACC:

    B - Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition mater

  • LTL:

    P - 77.5

  • TCC:

    Z - No special type of cargo code applicable

NSN Management Codes:
  • SOS
    Sms
  • AAC
    V
  • Quantity per pack
    1
  • Unit of Measure
    Ea
  • Shelf Life
    N/A
  • Classification Control
    U
  • MGMT_CTL
    9b-----
  • Repariability

Questions & Answers:
What are the historical prices recorded for this stock number?
Historical data shows pricing from $785.94 to $1,309.91..
Does NSN 4820-00-010-1680 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Department Of The Navy, and Italy
What is the NIIN of NSN 4820-00-010-1680?
000101680 or 00-010-1680
Does NSN 4820-00-010-1680 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 4820-00-010-1680?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Jan 01, 1963