Product Details | SAFETY RELIEF VALVE

4820-00-639-6640 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: 89PS587, 89PS799, 89SP586, 9937010024, 9-937-01-0024, 4820-00-639-6640, 00-639-6640, 4820006396640, 006396640

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 01 JAN 1961 00-639-6640

Drawings & Photos | NSN 4820-00-639-6640


Cross Reference | NSN 4820-00-639-6640

Part Number Cage Code Manufacturer
89PS587 11976 CHICAGO PNEUMATIC TOOL CO
89PS587 88687 CHICAGO PNEUMATIC TOOL CO
89PS799 00742 AIR PRODUCTS AND CHEMICALS, INC. DBA AIR PRODUCTS
89PS799 11976 CHICAGO PNEUMATIC TOOL CO
89PS799 88687 CHICAGO PNEUMATIC TOOL CO
89SP586 11976 CHICAGO PNEUMATIC TOOL CO
89SP586 88687 CHICAGO PNEUMATIC TOOL CO
9-937-01-0024 00742 AIR PRODUCTS AND CHEMICALS, INC. DBA AIR PRODUCTS

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Technical Data | NSN 4820-00-639-6640

Characteristic Specifications
MATERIAL COPPER ALLOY BODY
STYLE DESIGNATOR C1 ANGLE
FLOW CONTROL DEVICE DISK
VALVE DISCHARGE FLOW RATE 988.0 CUBIC FEET PER MINUTE
VALVE OPERATION METHOD AUTOMATIC OR MANUAL
CONNECTION TYPE THREADED EXTERNAL PIPE 1ST END THREADED INTERNAL PIPE 2ND END
CONNECTION STYLE G46B PLAIN 1ST END G9 PLAIN 2ND END
THREAD SERIES DESIGNATOR NPT ALL ENDS
NOMINAL THREAD SIZE 0.750 INCHES ALL ENDS
THREAD DIRECTION RIGHT-HAND ALL ENDS
RENEWABLE SEAT RING TYPE THREADED
DISK LOADING METHOD SPRING
OPENING PRESSURE SETTING 1200.0 POUNDS PER SQUARE INCH

Restrictions/Controls & Freight Information | NSN 4820-00-639-6640

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 4820-00-639-6640

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 CodesJNOT 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 CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each