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Pressure And Temperature Relief Valve

NSN: 4820-00-138-5429 | Model: N240X9

A valve designed to release under excessive pressure and/or excessive temperature by opening at a predetermined pressure and/or temperature. Thermostatically operated valves close when the pressure is relieved or the temperature is reduced. Fusible plug valves require replacement of the plug. See also valve, safety relief and valve, regulating. Temperature.

NSN Properties and Flags
NATO Stock Number
4820-00-138-5429
DEMIL
NO
Body Material
Steel
Outside Surface Treatment
Painted brown
Body Style
Angle give "adqm" and "adqn" only if flanged one or two ends
Stem Material
Steel
Tempurature Rating
210.0 degrees fahrenheit
Media For Which Designed
Water, fresh
First End Connection Type
Threaded internal pipe
First End Style Designator
Plain
First End Pipe Size Accommodated
1.000 inches
First End Thread Direction
Right-hand
Second End Relationship With First End
Identical
Seat Material
Steel
Flow Control Device
Piston, spring loaded
Flow Control Device Material
Steel
End Connection Quantity
2
Tempurature Adjustability
Not adjustable
Tempurature Control Device Type
Thermostatic

Pricing and Availability

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NSN 4820-00-138-5429 Datasheet

Supply Class (FSC):
Nonpowered Valves
Cross Reference:
  • N240X9
  • 240X8
Cage Codes:
  • Watts Regulator Co (CAGE 79227)
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

U - Precious metal content is unknown

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:

    594 - Pumps and parts, (machinery and parts),(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
    J
  • Quantity per pack
    1
  • Unit of Measure
    Ea
  • Shelf Life
    N/A
  • Classification Control
    U
  • MGMT_CTL
    Sf9sx-n
  • Repariability

Questions & Answers:
What are the historical prices recorded for this stock number?
Historical data shows pricing from $1,231.16 to $2,051.93..
Does NSN 4820-00-138-5429 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 Air Force
What is the NIIN of NSN 4820-00-138-5429?
001385429 or 00-138-5429
Does NSN 4820-00-138-5429 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 4820-00-138-5429?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Jul 30, 1971