Product Details | SAFETY RELIEF VALVE

4820-01-576-4770 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: D559B-4M-2.0, D559B4M20, 4820-01-576-4770, 01-576-4770, 4820015764770, 015764770

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 03 AUG 2009 01-576-4770

Drawings & Photos | NSN 4820-01-576-4770


Demand History | NSN 4820-01-576-4770

Part Number Request Date QTY Origin
D559B4M20 2021-01-13 1 United States

Cross Reference | NSN 4820-01-576-4770

Part Number Cage Code Manufacturer
D559B-4M-2.0 91816 CIRCOR AEROSPACE, INC. DBA CIRCLE SEAL CONTROLS

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Technical Data | NSN 4820-01-576-4770

Characteristic Specifications
CONNECTION TYPE THREADED EXTERNAL PIPE 1ST END
THREAD DIRECTION RIGHT-HAND 1ST END
STYLE DESIGNATOR ERR-090
THREAD SERIES DESIGNATOR NPT 1ST END
END ITEM IDENTIFICATION NEW CONSTRUCTION CVN77
MAXIMUM OPERATING TEMP 275.0 DEG FAHRENHEIT SINGLE RESPONSE
CONNECTION STYLE G46B PLAIN (PIPE) 1ST END
OPENING PRESSURE SETTING 2.0 POUNDS PER SQUARE INCH
MATERIAL COPPER ALLOY BODY
NOMINAL THREAD SIZE 0.500 INCHES 1ST END
MINIMUM OPERATING TEMP -65.0 DEG FAHRENHEIT
VALVE OPERATION METHOD AUTOMATIC

Restrictions/Controls & Freight Information | NSN 4820-01-576-4770

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:BMunitions List Item - Mutilation (MUT) to the point of scrap required. (Formerly: Demilitarization not required. Trade Security Controls (TSCs) required at disposition.)
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
Less than truck load rating P 77.5
Water commodity Code 594 unknown
Originating Activity Code HD Naval Inventory Control Point
Mechanicsburg, PA 17055-0788
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 4820-01-576-4770

Category Code Description
Cognizance Codes3BNavy-owned stocks of field level repairable DLA material
Naval Inventory Control Point, Mechanicsburg
Source of SupplySMSDefense Logistics Agency
Enterprise Business Systems
AgencyDNDepartment of the Navy
Service OrganizationNU.S. Navy
ReparabilityDField Level Reparables
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