Product Details | SAFETY RELIEF VALVE

4820-00-287-4264 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: 207616PCV780, 2076-16PCV780, 2144900799254PCV780, 214-4900-799254PCV780, 247616PCV782, 2476-16PCV782, 2714900957265PCV780, 271-4900-957265PCV780, 277623PCV782, 2776-23PCV782, 31949001188487PCV904, 319-4900-1188487PCV904, 337612PCV904, 3376-12PCV904, 34049001000937PVC5, 340-4900-1000937PVC5, 3464900484711PCV782, 346-4900-484711PCV782, 366433PCV3, 3664-33PCV3, 389588PCV780, 4412176250, 44-1-2-176-250, 533115PCV782, 57138011302581PCV3, 571-3801-1302581PCV3, 4820-00-287-4264, 00-287-4264, 4820002874264, 002874264

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 01 JAN 1961 00-287-4264

Drawings & Photos | NSN 4820-00-287-4264


Cross Reference | NSN 4820-00-287-4264

Part Number Cage Code Manufacturer
2076-16PCV780 96169 ELECTRIC BOAT CORPORATION
214-4900-799254PCV780 53711 NAVAL SEA SYSTEMS COMMAND
214-4900-799254PCV780 80064 NAVAL SHIP SYSTEMS COMMAND
2476-16PCV782 96169 ELECTRIC BOAT CORPORATION
271-4900-957265PCV780 53711 NAVAL SEA SYSTEMS COMMAND
271-4900-957265PCV780 80064 NAVAL SHIP SYSTEMS COMMAND
2776-23PCV782 96169 ELECTRIC BOAT CORPORATION
319-4900-1188487PCV904 53711 NAVAL SEA SYSTEMS COMMAND
319-4900-1188487PCV904 80064 NAVAL SHIP SYSTEMS COMMAND
3376-12PCV904 96169 ELECTRIC BOAT CORPORATION
340-4900-1000937PVC5 80064 NAVAL SHIP SYSTEMS COMMAND
346-4900-484711PCV782 53711 NAVAL SEA SYSTEMS COMMAND
346-4900-484711PCV782 80064 NAVAL SHIP SYSTEMS COMMAND
3664-33PCV3 96169 ELECTRIC BOAT CORPORATION
389588PCV780 53711 NAVAL SEA SYSTEMS COMMAND
389588PCV780 80064 NAVAL SHIP SYSTEMS COMMAND
44-1-2-176-250 37239 LUNKENHEIMER CO
533115PCV782 53711 NAVAL SEA SYSTEMS COMMAND
533115PCV782 80064 NAVAL SHIP SYSTEMS COMMAND
571-3801-1302581PCV3 53711 NAVAL SEA SYSTEMS COMMAND
571-3801-1302581PCV3 80064 NAVAL SHIP SYSTEMS COMMAND

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Technical Data | NSN 4820-00-287-4264

Characteristic Specifications
MATERIAL COPPER ALLOY BODY NICKEL ALLOY FLOW CONTROL DEVICE NICKEL ALLOY SEAT
STYLE DESIGNATOR C1 ANGLE
FLOW CONTROL DEVICE POPPET
MEDIA FOR WHICH DESIGNED STEAM SINGLE RESPONSE
MAXIMUM OPERATING PRESSURE 250.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP 550.0 DEG FAHRENHEIT SINGLE RESPONSE
VALVE OPERATION METHOD AUTOMATIC OR MANUAL
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 0.500 INCHES 2ND END
THREAD SERIES DESIGNATOR NPT 1ST END NPT 2ND END
NOMINAL THREAD SIZE 0.500 INCHES 1ST END 0.500 INCHES 2ND END
THREAD DIRECTION RIGHT-HAND 1ST END RIGHT-HAND 2ND END
RENEWABLE SEAT RING TYPE RETAINING SCREW
BONNET TYPE EXPOSED SPRING
BONNET ATTACHMENT METHOD THREADED
DISK LOADING METHOD SPRING
OPENING PRESSURE SETTING 250.0 POUNDS PER SQUARE INCH
FEATURES PROVIDED VALVE STEM LOCK SHIELD AND PRESSURE TIGHT OUTLET SIDE

Restrictions/Controls & Freight Information | NSN 4820-00-287-4264

Category Code Description
Shelf-Life Code:0Nondeteriorative
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:ANon-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Controlled Inventory Item Code:UUNCLASSIFIED
Precious Metals Indicator Code:UPrecious 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 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 4820-00-287-4264

Category Code Description
Cognizance Codes9CNavy-owned stocks of defense construction material
Naval Inventory Control Point, Mechanicsburg
Source of SupplyS9CDefense Supply Center Columbus
Columbus, OH 43215
AgencyDNDepartment of the Navy
Service OrganizationNU.S. Navy
Acquisition Advice CodesVTERMINAL ITEM # Identifies items in stock, but future procurement is not authorized. Requisitions may continue to be submitted until stocks are exhausted. Preferred item National Stock Number is normally provided by application of the phrase: When Exhausted Use (NSN). Requisitions will be submitted in accordance with IMM/Service requisitioning procedures as applicable.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each