Product Details | SAFETY RELIEF VALVE

4820-00-833-7839 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: 684-2-1/8D1, 684218D1, 684-2-1-8D1, 788C424, 788C424H07, 4820-00-833-7839, 00-833-7839, 4820008337839, 008337839

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 15 SEP 1967 00-833-7839

Drawings & Photos | NSN 4820-00-833-7839


Demand History | NSN 4820-00-833-7839

Part Number Request Date QTY Origin
4820-00-833-7839 2013-10-284 10 United States
4820-00-833-7839 2012-06-170 1 DIBBS

Cross Reference | NSN 4820-00-833-7839

Part Number Cage Code Manufacturer
684-2-1-8D1 86768 TELEDYNE INDUSTRIES INC TELEDYNE FLUID SYSTEMS REPUBLIC
684-2-1/8D1 09990 PARKER-HANNIFIN CORPORATION DBA HYDRAULIC VALVE DIV
788C424 97942 NORTHROP GRUMMAN SYSTEMS CORPORATION DIV NORTHROP GRUMMAN SYSTEMS
788C424H07 97942 NORTHROP GRUMMAN SYSTEMS CORPORATION DIV NORTHROP GRUMMAN SYSTEMS

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Technical Data | NSN 4820-00-833-7839

Characteristic Specifications
MATERIAL ALUMINUM ALLOY BODY STEEL COMP 303 FLOW CONTROL DEVICE RUBBER SYNTHETIC SEAT
STYLE DESIGNATOR C6 STRAIGHT THRU
FLOW CONTROL DEVICE POPPET
MEDIA FOR WHICH DESIGNED AIR 1ST RESPONSE GAS, INERT 2ND RESPONSE
MAXIMUM OPERATING PRESSURE 50.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP 225.0 DEG FAHRENHEIT SINGLE RESPONSE
VALVE OPERATION METHOD AUTOMATIC
CONNECTION TYPE THREADED EXTERNAL PIPE ALL ENDS
CONNECTION STYLE G46B PLAIN ALL ENDS
THREAD SERIES DESIGNATOR NPT ALL ENDS
NOMINAL THREAD SIZE 0.125 INCHES ALL ENDS
THREAD DIRECTION RIGHT-HAND ALL ENDS
DISK LOADING METHOD SPRING
OPENING PRESSURE SETTING 20.0 POUNDS PER SQUARE INCH

Restrictions/Controls & Freight Information | NSN 4820-00-833-7839

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 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