NSN 4820-00-412-4291

Safety Relief Valve

FSC: 4820 NIIN: 004124291

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Product Characteristics

NSN:

4820004124291

Demilitarization:

INC:

05488

Shelf Life:

N/A

Thread Class:

3a 1st end

Thread Direction:

Right-hand 1st end

Flow Control Device:

Poppet

Bonnet Type:

Inside spring

Bonnet Attachment Method:

Integral

Disk Loading Method:

Spring

Maximum Operating Temp:

400.0 degrees fahrenheit single response

Minimum Operating Temp:

-100.0 degrees fahrenheit

Connection Style:

Flared (tube) all ends

Valve Operation Method:

Automatic

Connection Type:

Threaded external tube all ends

Features Provided:

Pressure tight outlet side

Thready Qty Per Inch (tpi):

20 1st end

Adjustable Pressure Range:

+60.0/+150.0 pounds per square inch

Maximum Operating Pressure:

200.0 pounds per square inch single response

Thread Size:

0.437 inches 1st end

Seat Angle:

37.0 degrees all ends

Opening Pressure Setting:

125.0 pounds per square inch

Outside Diameter Tube Accommodated:

0.250 inches 1st end

Material:

Plastic polytetrafluoroethylene seat

Media For Which Designed:

Water-oil-gas single response

Surface Treatment:

Anodize

Surface Treatment Specification:

Mil-a-86251 military specification single treatment response

Style Designator:

Straight through w/baffle

Thread Series Designator:

Unjf all ends

Furnished Items And Quantity:

1 deflector cap

Demand History (Solicitations)

Solicitation	Qty	End Date	Purchase Request	Small Business
SPE7MC20T4795	4	02/18/2020	0083543030	0%
SPE7MC18T4936	3	01/29/2018	0072503488	0%

Part Numbers

D520A4D125
CIRCOR AEROSPACE, INC.
GV500KF4D125D
NORTHROP GRUMMAN SYSTEMS CORPORATION

Shipping & Handling

HMIRS:

No MSDS. No hazardous material.

ESD:

No known electrostatic discharge.

Schedule B:

8481400000 - Safety or relief valves.

Professional Distribution

ITAR Registered
DDTC Registered
HAZMAT Certified
AS9120 Quality Standards
100% Quality Inspections

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Cage Codes

CIRCOR AEROSPACE, INC. - 91816

NORTHROP GRUMMAN SYSTEMS CORPORATION - 26512