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NSN: 4820-00-001-0037
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NSN 4820-00-001-0037 Safety Relief Valve

Manufacturer Part Numbers

Part Number Name Cage Code
D559A3M2 Valve,safety Relief 91816

Management Codes

CTL: ------- (MOE: DS)
AAC: Not stocked, centrally procured # (non-stocked items). imm/service centrally managed but not stocked item. procurement will be initiated only after receipt of a requisition.
QUP: 1
SLC: 0

Freight Codes

NMF Desc: Pressure Reg/red/relief Valves Noi
NMFC: 127220
UFC: 64490
LTL: 77.5
WCC: Pumps and parts, (machinery and parts),(less than 35 feet)
TCC: No special type of cargo code applicable
SHC: Other or no special handling required (sh)
ADC: Shipment is not a consolidation and does not exceed 84 inches in any dimension.
ACC: Trailers, vehicles, machinery, shop and warehouse equipment and supplies including special tools and equipment, ground servicing
ASH: No special handling required.


DEMIL Integ:
ESD: )
Schedule B: 8481400000 – Safety or relief valves
NIIN: 000010037

4820-00-001-0037 Datasheet

Bonnet Attachment Method: Threaded
Bonnet Type: Inside screw
Connection Style: Plain (pipe) 1st end
Connection Type: Threaded external pipe 1st end
Disk Loading Method: Spring
Flow Control Device: Poppet
Material: Aluminum alloy 2024 body
Material: Aluminum alloy 2024 seat
Maximum Operating Temp: 280.0 deg fahrenheit single response
Maximum Operating Pressure: 200.0 pounds per square inch single response
Media For Which Designed: Air 1st response
Media For Which Designed: Hydrogen 4th response
Nominal Pipe Size Accommodated: 0.375 inches 1st end
Nominal Thread Size: 0.375 inches 1st end
Opening Pressure Setting: 2.0 pounds per square inch
Material Document And Classification: Qq-a-225/6,alloy2024,t4 fed spec single material response body
Material Document And Classification: Qq-a-225/6,alloy2024,t4 fed spec single material response seat
Style Designator: Straight thru w/baffle
Surface Treatment Document And Classification: Mil-a-8625,ty 1 mil spec single treatment response
Surface Treatment: Anodize
Thread Direction: Right-hand 1st end
Thread Series Designator: Npt 1st end
Valve Operation Method: Automatic

Questions & Answers

What are the historical prices recorded for this stock number?
No pre-dated pricing for this NSN could be found.
What NATO entities are users of this NSN?
United States
How is national stock number 4820-00-001-0037 categorized?
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.
Does this item require Demilitarization?
Non-usml/non-ccli - no demil or dod tsc required. department of commerce may impose licensing requirements to certain destinations. (note 9).
Is this item ITAR controlled?
No. This item is not ITAR Controlled.
When was this national stock number assigned to the federal catalog?
Sep 24, 1972