Product Details | SAFETY RELIEF VALVE

4820-00-287-4105 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: M364611PC46, M36461-1PC46, M365481PC580, M36548-1PC580, M365582ALT1PC580, M36558-2ALT1PC580, M365582PC580, M36558-2PC580, M36737PC580, M36812PC580, V009, 51143PC580, 51-143PC580, 51160PC580, 51-160PC580, 51332PC580, 51-332PC580, 51335PC580, 51-335PC580, 51391PC580, 51-391PC580, 51449PC580, 51-449PC580, 4600275000, 460-0275-000, 4820-00-287-4105, 00-287-4105, 4820002874105, 002874105

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 01 JAN 1963 00-287-4105

Drawings & Photos | NSN 4820-00-287-4105


Cross Reference | NSN 4820-00-287-4105

Part Number Cage Code Manufacturer
460-0275-000 76371 MECHANICAL EQUIPMENT COMPANY, INC. DBA MECO
51-143PC580 70876 BATH IRON WORKS CORPORATION
51-160PC580 70876 BATH IRON WORKS CORPORATION
51-332PC580 70876 BATH IRON WORKS CORPORATION
51-335PC580 70876 BATH IRON WORKS CORPORATION
51-391PC580 70876 BATH IRON WORKS CORPORATION
51-449PC580 70876 BATH IRON WORKS CORPORATION
M36461-1PC46 70876 BATH IRON WORKS CORPORATION
M36548-1PC580 70876 BATH IRON WORKS CORPORATION
M36558-2ALT1PC580 70876 BATH IRON WORKS CORPORATION
M36558-2PC580 70876 BATH IRON WORKS CORPORATION
M36737PC580 70876 BATH IRON WORKS CORPORATION
M36812PC580 70876 BATH IRON WORKS CORPORATION
V009 70876 BATH IRON WORKS CORPORATION

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Technical Data | NSN 4820-00-287-4105

Characteristic Specifications
MATERIAL COPPER ALLOY BODY COPPER ALLOY FLOW CONTROL DEVICE NICKEL ALLOY SEAT COPPER ALLOY STEM
STYLE DESIGNATOR C1 ANGLE
FLOW CONTROL DEVICE DISK
MEDIA FOR WHICH DESIGNED STEAM 1ST RESPONSE AIR 2ND RESPONSE
MAXIMUM OPERATING PRESSURE 200.0 POUNDS PER SQUARE INCH 1ST RESPONSE 300.0 POUNDS PER SQUARE INCH 2ND RESPONSE
MAXIMUM OPERATING TEMP 425.0 DEG FAHRENHEIT 1ST RESPONSE 350.0 DEG FAHRENHEIT 2ND RESPONSE
VALVE OPERATION METHOD AUTOMATIC OR MANUAL
CONNECTION TYPE THREADED INTERNAL PIPE ALL ENDS
CONNECTION STYLE G9 PLAIN ALL ENDS
NOMINAL PIPE SIZE ACCOMMODATED 1.250 INCHES 1ST END
THREAD SERIES DESIGNATOR NPT ALL ENDS
NOMINAL THREAD SIZE 1.250 INCHES ALL ENDS
THREAD DIRECTION RIGHT-HAND ALL ENDS
BONNET TYPE EXPOSED SPRING
BONNET ATTACHMENT METHOD UNION
DISK LOADING METHOD SPRING
ADJUSTABLE PRESSURE RANGE 4.0 TO 9.0 POUNDS PER SQUARE INCH
FEATURES PROVIDED VALVE STEM LOCK SHIELD

Restrictions/Controls & Freight Information | NSN 4820-00-287-4105

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 4820-00-287-4105

Category Code Description
Cognizance Codes9BNavy-owned stocks of DLA material
Naval Inventory Control Point, Mechanicsburg
Source of SupplySMSDefense Logistics Agency
Enterprise Business Systems
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