NSN 4820-00-289-4375 A7636, N20147PC22, N21502PC12

Product Details | SAFETY RELIEF VALVE

4820-00-289-4375 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: A7636, N20147PC22, N21502PC12, N26250PC42, N26447PC41, N26658PC12, 3237512, 81127S4120147ALT2PC22, 81127S41-20147ALT2PC22, 81127S4121502ALT1PC12, 81127S41-21502ALT1PC12, 81127S4126250ALT4PC42, 81127S41-26250ALT4PC42, 81127S4126447ALT4PC41, 81127S41-26447ALT4PC41, 81127S4126658ALT8PC12, 81127S41-26658ALT8PC12, 4820-00-289-4375, 00-289-4375, 4820002894375, 002894375

Valves | Valves, Nonpowered

Supply Group (FSG)	NSN Assign.	NIIN	Item Name Code (INC)
48	01 JAN 1961	00-289-4375	05488 ( VALVE, SAFETY RELIEF )

Drawings & Photos | NSN 4820-00-289-4375

Cross Reference | NSN 4820-00-289-4375

Part Number	Cage Code	Manufacturer
3237512	24617	GENERAL MOTORS CORP
3237512	55380	HATCH & KIRK, INC. DIV HATCH & KIRK INC
3237512	72915	GENERAL MOTORS CORP ELECTRO-MOTIVE DIV
81127S41-20147ALT2PC22	53711	NAVAL SEA SYSTEMS COMMAND
81127S41-20147ALT2PC22	80064	NAVAL SHIP SYSTEMS COMMAND
81127S41-21502ALT1PC12	53711	NAVAL SEA SYSTEMS COMMAND
81127S41-21502ALT1PC12	80064	NAVAL SHIP SYSTEMS COMMAND
81127S41-26250ALT4PC42	53711	NAVAL SEA SYSTEMS COMMAND
81127S41-26250ALT4PC42	80064	NAVAL SHIP SYSTEMS COMMAND
81127S41-26447ALT4PC41	80064	NAVAL SHIP SYSTEMS COMMAND
81127S41-26658ALT8PC12	80064	NAVAL SHIP SYSTEMS COMMAND
A7636	24617	GENERAL MOTORS CORP
A7636	72915	GENERAL MOTORS CORP ELECTRO-MOTIVE DIV
N20147PC22	24617	GENERAL MOTORS CORP
N20147PC22	55380	HATCH & KIRK, INC. DIV HATCH & KIRK INC
N20147PC22	72915	GENERAL MOTORS CORP ELECTRO-MOTIVE DIV
N21502PC12	24617	GENERAL MOTORS CORP
N21502PC12	55380	HATCH & KIRK, INC. DIV HATCH & KIRK INC
N21502PC12	72915	GENERAL MOTORS CORP ELECTRO-MOTIVE DIV
N26250PC42	24617	GENERAL MOTORS CORP
N26250PC42	55380	HATCH & KIRK, INC. DIV HATCH & KIRK INC
N26250PC42	72915	GENERAL MOTORS CORP ELECTRO-MOTIVE DIV
N26447PC41	24617	GENERAL MOTORS CORP
N26447PC41	55380	HATCH & KIRK, INC. DIV HATCH & KIRK INC
N26447PC41	72915	GENERAL MOTORS CORP ELECTRO-MOTIVE DIV
N26658PC12	24617	GENERAL MOTORS CORP
N26658PC12	55380	HATCH & KIRK, INC. DIV HATCH & KIRK INC
N26658PC12	72915	GENERAL MOTORS CORP ELECTRO-MOTIVE DIV

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Related Products | NSN 4820-00-289-4375

4820-00-289-4381, 4820-00-289-4383, 4820-00-289-4384, 4820-00-289-4389, 4820-00-289-4425

Technical Data | NSN 4820-00-289-4375

Characteristic	Specifications
MATERIAL	COPPER ALLOY 836 BODY COPPER ALLOY 836 FLOW CONTROL DEVICE COPPER ALLOY 836 SEAT STEEL STEM
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-C-390,ALLOYB5/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY QQ-C-390,ALLOYB5/D/ FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE QQ-C-390,ALLOYB5/D/ FED SPEC SINGLE MATERIAL RESPONSE SEAT
STYLE DESIGNATOR	C1 ANGLE
FLOW CONTROL DEVICE	DISK
MEDIA FOR WHICH DESIGNED	STEAM 1ST RESPONSE WATER-OIL-GAS 2ND RESPONSE
MAXIMUM OPERATING PRESSURE	300.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP	400.0 DEG FAHRENHEIT SINGLE RESPONSE
VALVE OPERATION METHOD	AUTOMATIC
CONNECTION TYPE	THREADED INTERNAL PIPE 1ST END THREADED EXTERNAL PIPE 2ND END
CONNECTION STYLE	G9 PLAIN 1ST END G46B PLAIN 2ND END
NOMINAL PIPE SIZE ACCOMMODATED	0.500 INCHES 1ST END 0.375 INCHES 2ND END
THREAD SERIES DESIGNATOR	NPT 1ST END NPT 2ND END
NOMINAL THREAD SIZE	0.500 INCHES 1ST END 0.375 INCHES 2ND END
THREAD DIRECTION	RIGHT-HAND 1ST END RIGHT-HAND 2ND END
BONNET TYPE	INSIDE SPRING
BONNET ATTACHMENT METHOD	THREADED
DISK LOADING METHOD	SPRING
ADJUSTABLE PRESSURE RANGE	31.0 TO 60.0 POUNDS PER SQUARE INCH
FEATURES PROVIDED	PRESSURE TIGHT OUTLET SIDE

Restrictions/Controls & Freight Information | NSN 4820-00-289-4375

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	XX
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

Category	Code	Description
Materiel Category and Inventory Manager	J	Ground Forces Support Materiel (DLA/GSA Items)
Appropriation and Budget Activity	2	Stock Fund Secondary Items
Management Inventory Segment	2	NONREPARABLE ITEMS (Exclusive of Insurance and Provisioning Items). This code will be used to identify items which are not reparable.
Specific Group/Generic Code	0	Medical Materiel
Weapons Systems/End Item or Homogeneous Group	00	DLA/GSA-Managed Items that cannot be identified to a specific Army Weapons Systems/End Item
Accounting Requirements Code	X	Expendable item. An item of Army property coded with an ARC of ?X? in the AMDF. Expendable items require no formal accountability after issue from a stock record account. Commercial and fabricated items similar to items coded ?X? in the AMDF are considered expendable items.
Source of Supply	SMS	Defense Logistics Agency Enterprise Business Systems
Agency	DA	Department of the Army
Service Organization	A	U.S. Army
Reparability	Z	This is a nonreparable item. If condemned or economically unserviceable, then dispose at the level authorized replace the item.
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

Category	Code	Description
Cognizance Codes	3B	Navy-owned stocks of field level repairable 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	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