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

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

Valve Disk
NSN 4820-01-520-4361
Flat Valve Diaphragm
NSN 4820-01-520-4420

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.

Certified Quality Assurance

ISO 9001:2015 + AS9120B
Counterfeit Parts Prevention
100% Product Inspections
7 Year Record Retention
On Time Delivery
HAZMAT Certified
Worldwide Shipping

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