Product Details | SAFETY RELIEF VALVE

4820-01-439-9033 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: D520T4D10, 918531, 4820-01-439-9033, 01-439-9033, 4820014399033, 014399033

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 23 DEC 1996 01-439-9033

Drawings & Photos | NSN 4820-01-439-9033


Cross Reference | NSN 4820-01-439-9033

Part Number Cage Code Manufacturer
918531 34228 L-3 COMMUNICATIONS CORPORATION DBA L-3 KEO
D520T4D10 91816 CIRCOR AEROSPACE, INC. DBA CIRCLE SEAL CONTROLS

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Technical Data | NSN 4820-01-439-9033

Characteristic Specifications
MATERIAL STEEL COMP 303 BODY STEEL COMP 303 FLOW CONTROL DEVICE STEEL COMP 303 SEAT
STYLE DESIGNATOR C5 STRAIGHT THRU W/BAFFLE
FLOW CONTROL DEVICE POPPET
MEDIA FOR WHICH DESIGNED WATER-OIL-GAS SINGLE RESPONSE
MAXIMUM OPERATING PRESSURE 200.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP 400.0 DEG FAHRENHEIT SINGLE RESPONSE
VALVE OPERATION METHOD AUTOMATIC
CONNECTION TYPE THREADED EXTERNAL TUBE 1ST END
CONNECTION STYLE G42 FLARED 1ST END
SEAT ANGLE 37.0 DEGREES 1ST END
THREAD SERIES DESIGNATOR UNJF 1ST END
NOMINAL THREAD SIZE 0.438 INCHES 1ST END
THREAD CLASS 3A 1ST END
THREAD DIRECTION RIGHT-HAND 1ST END
BONNET TYPE INSIDE SPRING
BONNET ATTACHMENT METHOD INTEGRAL
DISK LOADING METHOD SPRING
OPENING PRESSURE SETTING 10.0 POUNDS PER SQUARE INCH
FURNISHED ITEMS AND QUANTITY 1 DEFLECTOR CAP
MINIMUM OPERATING TEMP -100.0 DEG FAHRENHEIT
III END ITEM IDENTIFICATION STRATEGIC SEALIFT CONVERSION SHIPS CLASS

Restrictions/Controls & Freight Information | NSN 4820-01-439-9033

Category Code Description
Shelf-Life Code:960 months
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 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 4820-01-439-9033

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 Code960 months
Purchasing QTY
UOM
1
EA : Each