NSN 4820-00-191-6881

Safety Relief Valve

FSC: 4820 NIIN: 001916881

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Product Characteristics

NSN:

4820001916881

Demilitarization:

INC:

05488

Shelf Life:

N/A

Thread Class:

3a 1st end

Thread Direction:

Right-hand 1st end

Flow Control Device:

Disk

Valve Discharge Flow Rate:

200.0 cubic feet per minute

Maximum Operating Temp:

450.0 degrees fahrenheit single response

Connection Style:

External seat for gasket seal (boss) 1st end

Valve Operation Method:

Automatic

Connection Type:

Threaded external boss 1st end

Features Provided:

Valve stem lock shield and pressure tight outlet side

Thready Qty Per Inch (tpi):

12 1st end

Adjustable Pressure Range:

+47.0/+53.0 pounds per square inch

Maximum Operating Pressure:

60.0 pounds per square inch single response

Thread Size:

1.312 inches 1st end

Opening Pressure Setting:

50.0 pounds per square inch

Outside Diameter Tube Accommodated:

1.000 inches 1st end

Material:

Aluminum alloy 2024

Material Specification:

Qq-a-225/6, alloy2024 federal specification all material responses

Media For Which Designed:

Air single response

Surface Treatment:

Anodize

Surface Treatment Specification:

Mil-a-8625 military specification single treatment response

Style Designator:

Straight thru

Thread Series Designator:

Un 1st end

Part Numbers

C491-2
LOCKHEED MARTIN CORPORATION
P20-383
CIRCOR AEROSPACE, INC.

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

LOCKHEED MARTIN CORPORATION - 81755

CIRCOR AEROSPACE, INC. - 91816