Product Details | SAFETY RELIEF VALVE

4820-01-056-4742 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: GV500LJ7, 1213T4BB15, 1213T-4BB-15, 4820-01-056-4742, 01-056-4742, 4820010564742, 010564742

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 23 FEB 1978 01-056-4742

Drawings & Photos | NSN 4820-01-056-4742


Cross Reference | NSN 4820-01-056-4742

Part Number Cage Code Manufacturer
1213T-4BB-15 91816 CIRCOR AEROSPACE, INC. DBA CIRCLE SEAL CONTROLS
GV500LJ7 26512 NORTHROP GRUMMAN SYSTEMS CORPORATION DIV NORTHROP GRUMMAN AEROSPACE

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Technical Data | NSN 4820-01-056-4742

Characteristic Specifications
MATERIAL STEEL COMP 303 BODY PLASTIC POLYPROPYLENE SEAT
STYLE DESIGNATOR A1 STRAIGHT THRU
FLOW CONTROL DEVICE PLUG
MEDIA FOR WHICH DESIGNED OXYGEN, GASEOUS 1ST RESPONSE HELIUM 2ND RESPONSE AIR 3RD RESPONSE HYDROGEN 4TH RESPONSE REFRIGERANT 12 5TH RESPONSE
MAXIMUM OPERATING PRESSURE 3000.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP -40.0 DEG FAHRENHEIT 1ST RESPONSE 240.0 DEG FAHRENHEIT 2ND RESPONSE
VALVE OPERATION METHOD AUTOMATIC
CONNECTION TYPE THREADED INTERNAL BOSS ALL ENDS
CONNECTION STYLE G4 GASKET SEAL ALL ENDS
THREAD SERIES DESIGNATOR UNF ALL ENDS
NOMINAL THREAD SIZE 0.438 INCHES ALL ENDS
THREAD CLASS 3B ALL ENDS
THREAD DIRECTION RIGHT-HAND ALL ENDS

Restrictions/Controls & Freight Information | NSN 4820-01-056-4742

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 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 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

Management | NSN 4820-01-056-4742

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