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Safety Relief Valve

NSN: 4820-01-520-4351 | Model: B16511-3

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
4820-01-520-4351
DEMIL
NO
Flow Control Device
Poppet
Bonnet Type
Inside spring
Bonnet Attachment Method
Bolted
Disk Loading Method
Spring
Bolt Hole Quantity
4 all ends
Maximum Operating Temp
150.0 degrees fahrenheit single response
Valve Operation Method
Automatic
Flange Shape
Round with holes all ends
Connection Type
Flange all ends
Valve Size
2.000 inches
Maximum Operating Pressure
85.0 pounds per square inch single response
Opening Pressure Setting
75.0 pounds per square inch
Outside Diameter
6.000 inches all ends
Thickness
0.750 inches all ends
First Connection Face To Centerline Distance
5.000 inches
Bolt Hole Diameter
0.750 inches all ends
Second Connection Face To Centerline Distance
5.000 inches
Bolt Circle Diameter
4.750 inches all ends
Flange Face Design
Raised straight all ends
Raised Face Height
0.060 inches all ends
Raised Face Diameter
3.620 inches all ends
Special Features
Media: hfc-236fa refrigerent or iso 46 poe lubricant
Material
Stainless steel body
Style Designator
Err-090
Test Data Document
Mil-std-167-1 by commander naval sea systems letter 9514 ser 05l2/027. 22 feb 2002 standard (includes industry or association standards, individual manufactureer standards, etc.).

Parts List for Safety Relief Valve  

Other components in the assembly of NSN 4820-01-520-4351
Recent Solicitations
Solicitation Return by Date Buyer Code Quantity
SPE7MC20T5907 2020-03-13 PMCMU 11 EA
SPE7MC20T4986 2020-02-18 PMCMU 4 EA
SPE7MC20T1516 2019-11-25 PMCMU 4 EA
SPE7MC19T163L 2019-09-03 PMCMU 4 EA
SPE7MC19T6925 2019-03-18 PMCMU 4 EA
SPE7MC19T1699 2018-11-13 PMCMU 4 EA
SPE7MC18T141M 2018-08-20 PMCMU 3 EA
SPE7MC18T5350 2018-02-08 PMCMU 4 EA
SPE7MC17TU016 2017-10-02 PMCMU 4 EA
SPE7MC17TH105 2017-04-27 PMCM2 9 EA

Inventory Check

The last inventory check on this NSN was done on 05/21/2024. Due to rapid changes in inventory this may not be the current stock qty.

  • New Surplus: 1

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

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NSN 4820-01-520-4351 Datasheet

Supply Class (FSC):
Nonpowered Valves
Cross Reference:
  • B16511-3
Cage Codes:
  • Carleton Technologies Inc (CAGE 04577)
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.

ESD

A - No known electrostatic discharge (esd) or electromagnetic interference (emi) sensitivity.

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
    Z
  • 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 $21,412.81 to $35,688.02..
Does NSN 4820-01-520-4351 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 4820-01-520-4351?
015204351 or 01-520-4351
Does NSN 4820-01-520-4351 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 4820-01-520-4351?
Solicitation SPE7MC20T5907 for qty 11 on 03/03/2020
When was this national stock number assigned to the federal catalog?
May 12, 2004