Product Details | SAFETY RELIEF VALVE

4820-01-120-4431 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: 6548L4Y, 718059, 4820-01-120-4431, 01-120-4431, 4820011204431, 011204431

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 18 OCT 1981 01-120-4431

Drawings & Photos | NSN 4820-01-120-4431


Cross Reference | NSN 4820-01-120-4431

Part Number Cage Code Manufacturer
6548L4Y 28968 CIRCOR INSTRUMENTATION TECHNOLOGIES, INC.
718059 F9758 SLCE - SOCIETE LORIENT CONSTRUCTIONELECTROMECANIQUE

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Technical Data | NSN 4820-01-120-4431

Characteristic Specifications
MATERIAL STEEL COMP 316 BODY STEEL COMP 303 FLOW CONTROL DEVICE STEEL COMP 316 SEAT
MATERIAL DOCUMENT AND CLASSIFICATION AISI 316 ASSN STD SINGLE MATERIAL RESPONSE BODY AISI 303 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE ASIS 316 ASSN STD SINGLE MATERIAL RESPONSE SEAT
STYLE DESIGNATOR A7 ANGLE
FLOW CONTROL DEVICE POPPET
MAXIMUM OPERATING PRESSURE 3000.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP 200.0 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
THREAD SERIES DESIGNATOR NPT 1ST END NPT 2ND END
NOMINAL THREAD SIZE 0.250 INCHES 1ST END 0.250 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 350.0 TO 1500.0 POUNDS PER SQUARE INCH

Restrictions/Controls & Freight Information | NSN 4820-01-120-4431

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:AItem does not contain precious metal
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 4820-01-120-4431

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 CodesYTERMINAL ITEM #(NON-STOCKED ITEMS) Future procurement is not authorized. No wholesale stock is available for issue. 1. Requisitions will not be processed to the wholesale manager. 2. Internal Service/agency requisitioning may be continued in accordance with the Service/agency requisitioning policies.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each