NSN 4820-01-021-0628 559A8D20, 01-021-0628, 010210628

Product Details | SAFETY RELIEF VALVE

4820-01-021-0628 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.

Part Alternates: 559A8D20, 4820-01-021-0628, 01-021-0628, 4820010210628, 010210628

Valves | Valves, Nonpowered

Supply Group (FSG)	NSN Assign.	NIIN	Item Name Code (INC)
48	08 MAY 1976	01-021-0628	05488 ( VALVE, SAFETY RELIEF )

Drawings & Photos | NSN 4820-01-021-0628

Part Number	Request Date	QTY	Origin
559A8D20	2024-05-135	13	DIBBS
559A8D20	2024-05-123	13	DIBBS
559A8D20	2023-04-96	6	DIBBS
559A8D20	2022-11-331	6	DIBBS
559A8D20	2021-06-172	3	DIBBS
559A8D20	2020-09-264	1	DIBBS
559A8D20	2019-10-288	8	DIBBS
559A8D20	2019-05-132	5	DIBBS
559A8D20	2019-01-24	5	DIBBS
559A8D20	2019-01-10	5	DIBBS
4820-01-021-0628	2017-08-233	1	DIBBS
4820-01-021-0628	2015-07-209	2	DIBBS
4820-01-021-0628	2015-02-56	2	DIBBS
4820-01-021-0628	2014-05-147	1	DIBBS
4820-01-021-0628	2014-05-133	1	DIBBS

Cross Reference | NSN 4820-01-021-0628

Part Number	Cage Code	Manufacturer
559A8D20	91816	CIRCOR AEROSPACE, INC. DBA CIRCLE SEAL CONTROLS

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Related Products | NSN 4820-01-021-0628

4820-01-021-0811, 4820-01-021-0847, 4820-01-021-1557, 4820-01-021-1558, 4820-01-021-1612

Technical Data | NSN 4820-01-021-0628

Characteristic	Specifications
MATERIAL	ALUMINUM ALLOY 2024 BODY
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE BODY
SURFACE TREATMENT	ANODIZE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-A-8625,TY 1 MIL SPEC SINGLE TREATMENT RESPONSE
STYLE DESIGNATOR	C4 STRAIGHT THRU
FLOW CONTROL DEVICE	POPPET
MAXIMUM OPERATING PRESSURE	200.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP	280.0 DEG FAHRENHEIT SINGLE RESPONSE
VALVE OPERATION METHOD	AUTOMATIC
CONNECTION TYPE	THREADED EXTERNAL TUBE 1ST END
CONNECTION STYLE	G46A PLAIN 1ST END
THREAD SERIES DESIGNATOR	UNJF 1ST END
NOMINAL THREAD SIZE	0.750 INCHES 1ST END
THREAD CLASS	3A 1ST END
THREAD DIRECTION	RIGHT-HAND 1ST END
DISK LOADING METHOD	SPRING
OPENING PRESSURE SETTING	20.0 POUNDS PER SQUARE INCH
MANUFACTURERS CODE	91816
DESIGN CONTROL REFERENCE	559A8D20

Restrictions/Controls & Freight Information | NSN 4820-01-021-0628

Restrictions
Freight

Category	Code	Description
Shelf-Life Code:	0	Nondeteriorative
Hazardous Material Indicator Code	N	There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:	A	Non-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Controlled Inventory Item Code:	U	UNCLASSIFIED
Precious Metals Indicator Code:	U	Precious metal type is unknown
Criticality Code:	X	The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Category	Code	Description
NMF Description	127220	PRESSURE REG/RED/RELIEF VALVES NOI
Less than car load rating
Less than truck load rating	P	77.5
Water commodity Code	594	unknown
Originating Activity Code	SE	San Antonio Air Logistics Center Kelly AFB, TX 78241-5000
Air Dimension Code	A	Shipment is not a consolidation and does not exceed 72 inches in any dimension.
Air Commodity	V	Vehicles, machinery, shop and warehouse equipment and supplies, including special tools and equipment, ground servicing and special purpose vehicles, marine equipment and supplies, repair and maintenance parts for the above.
Air Special Handling	Z	No special handling required.
Special Handling Code	9	unknonwn
HAZMAT
Type of Cargo	Z	No special type of cargo code applicable

Management | NSN 4820-01-021-0628

Air Force

Category	Code	Description
Budget Code	9	General Support DIV57X4921.070:Air Force decentrally managed expense items (ERRC XB3, XF-3) with a unit cost of less than $250,000 that are requisitioned/procured at base (retail) level from DLA, GSA, Army, Navy, Depot Maintenance Service, Air Force Industrial Fund (AFMC), local manufacture and commercial vendors.
Materiel Management Aggregation Code	AW	SX:AIRBORNE WARNING AND CONTROL SYSTEM (AWACS) 411L
Price Validation	N	The current standard price in Catalog Management Data (CMD) has not analyzed or coded for LP/LM. The price has not been analyzed or reviewed for accuracy. ZOP or Standard price challenges are permissible, but must be supported with adequate justification. However, if coded for Local Purchase (LP) or Fabrication/Manufacture as indicated with an (LM) Acquisition Advice Code of ?L? or?F?,the case must be evaluated locally where purchased or fabricated.
Fund Code	SF	Stock fund applicable to items managed for the Air Force by the respective Inventory Control Point.
Source of Supply	SMS	Defense Logistics Agency Enterprise Business Systems
Agency	DF	Department of the Air Force
Service Organization	F	U.S. Air Force
Reparability	N	Stock Fund (except Munitions)
Acquisition Advice Codes	J	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.
Controlled Item Code	U	UNCLASSIFIED
Shelf Life Code	0	Nondeteriorative
Purchasing	QTY UOM	1 EA : Each