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Safety Relief Valve

NSN: 4820-00-041-2495 | Model: MILV20065

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
4820-00-041-2495
DEMIL
NO
Flow Control Device
Poppet
Bonnet Type
Exposed spring
Bonnet Attachment Method
Bolted
Disk Loading Method
Spring
Valve Discharge Flow Rate
282.0 pounds per hour
Bolt Hole Quantity
4 all ends
Maximum Operating Temp
850.0 degrees fahrenheit single response
Valve Operation Method
Manual
Flange Shape
Round with holes all ends
Connection Type
Flange all ends
Adjustable Pressure Range
+46.0 to 72.0 pounds per square inch
Maximum Operating Pressure
300.0 pounds per square inch single response
Opening Pressure Setting
72.0 pounds per square inch
Outside Diameter
3.750 inches all ends
Thickness
0.562 inches all ends
Bolt Hole Diameter
0.625 inches all ends
Bolt Circle Diameter
2.625 inches all ends
Flange Face Design
Raised straight all ends
Raised Face Height
0.062 inches all ends
Raised Face Diameter
1.375 inches all ends
Material
Steel seat
Material Specification
Fedstd66, aisi416/sae51416 federal standard single material response stem
Media For Which Designed
Steam single response
Style Designator
Angle
Test Data Document
81349-mil-s-901 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).
Nondefinitive Specification/std Data
2 type and d composition and 0.500 size

Pricing and Availability

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NSN 4820-00-041-2495 Datasheet

Supply Class (FSC):
Nonpowered Valves
Cross Reference:
  • MILV20065
Cage Codes:
  • Military Specifications (CAGE 81349)
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.

ADPE

- Represents items with no adp components

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.

  • LTL:

    P - 77.5

  • ACC:

    V - Trailers, vehicles, machinery, shop and warehouse equipment and supplies including special tools and equipment, ground servicing

  • TCC:

    Z - No special type of cargo code applicable

NSN Management Codes:
  • SOS
    Sms
  • AAC
    X
  • 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 $3,055.16 to $5,091.93..
Does NSN 4820-00-041-2495 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
What is the NIIN of NSN 4820-00-041-2495?
000412495 or 00-041-2495
Does NSN 4820-00-041-2495 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 4820-00-041-2495?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Nov 17, 1972