Product Details | SAFETY RELIEF VALVE

4820-01-057-6793 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: 5349T2PPL5500, 5349T-2PP-L-5500, 5349T2PPL55002, 5349T-2PP-L-5500-2 , 639AS1366, 639AS13662, 639AS1366-2, 4820-01-057-6793, 01-057-6793, 4820010576793, 010576793

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 17 MAR 1978 01-057-6793

Drawings & Photos | NSN 4820-01-057-6793


Demand History | NSN 4820-01-057-6793

Part Number Request Date QTY Origin
4820-01-057-6793 2015-05-134 19 DIBBS
4820-01-057-6793 2015-04-110 2 DIBBS
4820-01-057-6793 2015-04-98 2 DIBBS

Cross Reference | NSN 4820-01-057-6793

Part Number Cage Code Manufacturer
5349T-2PP-L-5500 91816 CIRCOR AEROSPACE, INC. DBA CIRCLE SEAL CONTROLS
639AS1366 30003 NAVAL AIR SYSTEMS COMMAND
639AS1366-2 30003 NAVAL AIR SYSTEMS COMMAND

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Technical Data | NSN 4820-01-057-6793

Characteristic Specifications
MATERIAL STEEL COMP 303 BODY PLASTIC POLYAMIDE FLOW CONTROL DEVICE STEEL COMP 303 SEAT
MATERIAL DOCUMENT AND CLASSIFICATION ASTM A582,TYPE 303,COND A ASSN STD SINGLE MATERIAL RESPONSE BODY L-P-410 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE ASTM A582,TYPE 303,COND A ASSN STD SINGLE MATERIAL RESPONSE SEAT
SURFACE TREATMENT PASSIVATE
STYLE DESIGNATOR C7 STRAIGHT THRU
FLOW CONTROL DEVICE POPPET
MEDIA FOR WHICH DESIGNED WATER-OIL-GAS SINGLE RESPONSE
MAXIMUM OPERATING TEMP 250.0 DEG FAHRENHEIT SINGLE RESPONSE
VALVE DISCHARGE FLOW RATE 500.0 CUBIC FEET PER MINUTE
VALVE OPERATION METHOD AUTOMATIC
CONNECTION TYPE THREADED INTERNAL PIPE ALL ENDS
CONNECTION STYLE G9 PLAIN ALL ENDS
THREAD SERIES DESIGNATOR NPT ALL ENDS
NOMINAL THREAD SIZE 0.250 INCHES ALL ENDS
THREAD DIRECTION RIGHT-HAND ALL ENDS
DISK LOADING METHOD SPRING
OPENING PRESSURE SETTING 5500.0 POUNDS PER SQUARE INCH
SPECIAL FEATURES LOCKWIRE

Restrictions/Controls & Freight Information | NSN 4820-01-057-6793

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.
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

Management | NSN 4820-01-057-6793

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 CodesZINSURANCE/NUMERIC STOCKAGE OBJECTIVE ITEM # Items which may be required occasionally or intermittently, and prudence requires that a nominal quantity of materiel be stocked due to the essentiality or the lead time of the item. 1. The item is centrally managed, stocked, and issued. 2. Requisitions will be submitted in accordance with IMM/Service requisitioning procedures.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each