NSN 4820-01-088-2874 D559A8D45, D559A-8D-45, 581R855

Product Details | SAFETY RELIEF VALVE

4820-01-088-2874 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: D559A8D45, D559A-8D-45, 581R855, 581R855H01, 4820-01-088-2874, 01-088-2874, 4820010882874, 010882874

Valves | Valves, Nonpowered

Supply Group (FSG)	NSN Assign.	NIIN	Item Name Code (INC)
48	10 JAN 1980	01-088-2874	05488 ( VALVE, SAFETY RELIEF )

Drawings & Photos | NSN 4820-01-088-2874

Part Number	Request Date	QTY	Origin
581R855H01	2021-09-255	43	DIBBS
581R855H01	2021-02-48	18	DIBBS
581R855H01	2020-09-272	41	DIBBS
581R855H01	2020-08-243	5	DIBBS
581R855H01	2020-08-231	19	DIBBS
581R855H01	2020-07-211	19	DIBBS
581R855H01	2020-07-188	42	DIBBS
581R855H01	2020-06-155	42	DIBBS
581R855H01	2020-05-127	7	DIBBS
581R855H01	2020-04-110	6	DIBBS
581R855H01	2020-03-69	23	DIBBS
581R855H01	2019-11-317	5	DIBBS
581R855H01	2019-11-307	10	DIBBS
581R855H01	2019-03-66	8	DIBBS
4820-01-088-2874	2018-07-210	10	DIBBS
4820-01-088-2874	2018-06-157	10	DIBBS
4820-01-088-2874	2018-05-151	5	DIBBS
4820-01-088-2874	2017-12-352	5	DIBBS
4820-01-088-2874	2015-10-278	9	DIBBS
4820-01-088-2874	2014-08-217	8	DIBBS

Cross Reference | NSN 4820-01-088-2874

Part Number	Cage Code	Manufacturer
581R855	97942	NORTHROP GRUMMAN SYSTEMS CORPORATION DIV NORTHROP GRUMMAN SYSTEMS
581R855H01	97942	NORTHROP GRUMMAN SYSTEMS CORPORATION DIV NORTHROP GRUMMAN SYSTEMS
D559A-8D-45	91816	CIRCOR AEROSPACE, INC. DBA CIRCLE SEAL CONTROLS

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Related Products | NSN 4820-01-088-2874

4820-01-088-2956, 4820-01-088-2957, 4820-01-088-2958, 4820-01-088-2959, 4820-01-088-2960

Technical Data | NSN 4820-01-088-2874

Characteristic	Specifications
MATERIAL	ALUMINUM ALLOY 2024 BODY STEEL COMP 303 FLOW CONTROL DEVICE ALUMINUM ALLOY 2024 SEAT
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-A-225/6,ALLOY 2024,T4 FED SPEC SINGLE MATERIAL RESPONSE BODY QQ-S-764,TYPE 303-CANCELED FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE QQ-A-225/6,ALLOY 2024,T4 FED SPEC SINGLE MATERIAL RESPONSE SEAT
SURFACE TREATMENT	ANODIZE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-A-8625,TYPE 1,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE
STYLE DESIGNATOR	C5 STRAIGHT THRU W/BAFFLE
FLOW CONTROL DEVICE	POPPET
MEDIA FOR WHICH DESIGNED	AIR 1ST RESPONSE ALCOHOL, ETHYL 2ND RESPONSE AMMONIA, GASEOUS 3RD RESPONSE FUEL/OIL, HYDROCARBON 4TH RESPONSE HELIUM 5TH RESPONSE
MAXIMUM OPERATING PRESSURE	200.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP	-40.0 DEG FAHRENHEIT 1ST RESPONSE 280.0 DEG FAHRENHEIT 2ND RESPONSE
VALVE DISCHARGE FLOW RATE	40.0 CUBIC FEET PER MINUTE
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 QUANTITY PER INCH	16 1ST END
THREAD CLASS	3A 1ST END
THREAD DIRECTION	RIGHT-HAND 1ST END
DISK LOADING METHOD	SPRING
OPENING PRESSURE SETTING	45.0 POUNDS PER SQUARE INCH
FURNISHED ITEMS AND QUANTITY	1 DEFLECTOR CAP

Restrictions/Controls & Freight Information | NSN 4820-01-088-2874

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	AX	Defense Supply Center Columbus Columbus, OH 43216-5000
Air Dimension Code	A	Shipment is not a consolidation and does not exceed 72 inches in any dimension.
Air Commodity	B	Construction materials: Includes paint and related materials, prefabricated building, wood products, metal and composition materials and their products, commercial hardware and miscellaneous items, cement, asphalt, building maintenance materials.
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 4820-01-088-2874

Air Force
Navy

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.
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.
Materiel Management Aggregation Code	SX	SX:AF SICA RESIDUAL MMAC-OC-ALC
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	Z	INSURANCE/NUMERIC STOCKAGE OBJECTIVE ITEM # Items which may be required occasionally or intermittently, and prudence requires that a nominal quantity of materiel be stocked due to the essentiality or the lead time of the item. 1. The item is centrally managed, stocked, and issued. 2. Requisitions will be submitted in accordance with IMM/Service requisitioning procedures.
Controlled Item Code	U	UNCLASSIFIED
Shelf Life Code	0	Nondeteriorative
Purchasing	QTY UOM	1 EA : Each

Category	Code	Description
Cognizance Codes	9B	Navy-owned stocks of DLA material Naval Inventory Control Point, Mechanicsburg
Source of Supply	SMS	Defense Logistics Agency Enterprise Business Systems
Agency	DN	Department of the Navy
Service Organization	N	U.S. Navy
Acquisition Advice Codes	Z	INSURANCE/NUMERIC STOCKAGE OBJECTIVE ITEM # Items which may be required occasionally or intermittently, and prudence requires that a nominal quantity of materiel be stocked due to the essentiality or the lead time of the item. 1. The item is centrally managed, stocked, and issued. 2. Requisitions will be submitted in accordance with IMM/Service requisitioning procedures.
Controlled Item Code	U	UNCLASSIFIED
Shelf Life Code	0	Nondeteriorative
Purchasing	QTY UOM	1 EA : Each