Product Details | SAFETY RELIEF VALVE

4820-00-509-6420 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: 3266754, 4820-00-509-6420, 00-509-6420, 4820005096420, 005096420

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 01 JAN 1963 00-509-6420

Drawings & Photos | NSN 4820-00-509-6420


Cross Reference | NSN 4820-00-509-6420

Part Number Cage Code Manufacturer
3266754 55380 HATCH & KIRK, INC. DIV HATCH & KIRK INC
3266754 72915 GENERAL MOTORS CORP ELECTRO-MOTIVE DIV

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Technical Data | NSN 4820-00-509-6420

Characteristic Specifications
STYLE DESIGNATOR C1A ANGLE FLANGED ENDS
VALVE OPERATION METHOD AUTOMATIC
CONNECTION TYPE FLANGE 1ST END FLANGE 2ND END
FLANGE SHAPE OVAL WITH HOLES 1ST END
FLANGE FACE DESIGN PLAIN 1ST END PLAIN 2ND END
BONNET TYPE INSIDE SPRING
BONNET ATTACHMENT METHOD BOLTED
DISK LOADING METHOD SPRING
OPENING PRESSURE SETTING 15.0 POUNDS PER SQUARE INCH
MOUNTING FACILITY BRACKET

Restrictions/Controls & Freight Information | NSN 4820-00-509-6420

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.
Automatic Data Processing Equipment:0Represents items with no ADP components. NOTE: Codes 1 through 6 are only to be used when the item is Automatic Data Processing Equipment (ADPE) in its entirety and is limited to the type meeting only one of the definitions for codes 1 through 6. (See code 9)
Category Code Description
NMF Description 127220 PRESSURE REG/RED/RELIEF VALVES NOI
Less than car load rating P 77.5
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 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 4820-00-509-6420

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
AY : Assembly