Safety Relief Valve

NSN: 4820-00-001-0037 | Model: D559A3M2

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

4820-00-001-0037

DEMIL

Pipe Size Accommodated

0.375 inches 1st end

Thread Direction

Right-hand 1st end

Flow Control Device

Poppet

Bonnet Type

Inside screw

Bonnet Attachment Method

Threaded

Disk Loading Method

Spring

Maximum Operating Temp

280.0 degrees fahrenheit single response

Connection Style

Plain (pipe) 1st end

Valve Operation Method

Automatic

Connection Type

Threaded external pipe 1st end

Maximum Operating Pressure

200.0 pounds per square inch single response

Thread Size

0.375 inches 1st end

Opening Pressure Setting

2.0 pounds per square inch

Material

Aluminum alloy 2024 body

Material Specification

Qq-a-225/6, alloy2024, t4 federal specification single material response seat

Media For Which Designed

Hydrogen 4th response

Surface Treatment

Anodize

Surface Treatment Specification

Mil-a-8625, type 1 military specification single treatment response

Style Designator

Straight through w/baffle

Thread Series Designator

Npt 1st end

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 4820-00-001-0037 Datasheet

Supply Class (FSC):

Nonpowered Valves

Cross Reference:

D559A3M2

Cage Codes:

Circor Aerospace, Inc. (CAGE 91816)

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.
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
J
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 $362.39 to $603.99..
Does NSN 4820-00-001-0037 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 4820-00-001-0037?
000010037 or 00-001-0037
Does NSN 4820-00-001-0037 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 4820-00-001-0037?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Sep 24, 1972