Product Details | SAFETY RELIEF VALVE

4820-01-255-6158 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: D41P-30UU-06 1/2 IN , D41P30UU0612IN, 20356, 203566940SS 1/2IN, 203566940SS 1-2, 203566940SS12, 203566940SS12IN, 4820-01-255-6158, 01-255-6158, 4820012556158, 012556158

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 22 MAY 1987 01-255-6158

Drawings & Photos | NSN 4820-01-255-6158


Demand History | NSN 4820-01-255-6158

Part Number Request Date QTY Origin
4820-01-255-6158 2016-05-133 1 DIBBS
20356 2010-11-334 3

Cross Reference | NSN 4820-01-255-6158

Part Number Cage Code Manufacturer
20356 01343 ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY
203566940SS 1-2 01343 ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY
203566940SS 1/2IN 01343 ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY
203566940SS 1/2IN 15187 PENTAIR VALVES & CONTROLS US LP DBA NAVY PRODUCT TEAM
D41P-30UU-06 1/2 IN 5P967 DANTE VALVE COMPANY INC
D41P-30UU-06 1/2 IN 65079 DANCO VALVE COMPANY

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Technical Data | NSN 4820-01-255-6158

Characteristic Specifications
MATERIAL STEEL CORROSION RESISTING OVERALL
STYLE DESIGNATOR C1 ANGLE
FLOW CONTROL DEVICE DISK
MEDIA FOR WHICH DESIGNED AIR SINGLE RESPONSE
MAXIMUM OPERATING PRESSURE 3450.0 POUNDS PER SQUARE INCH 1ST RESPONSE 3000.0 POUNDS PER SQUARE INCH 2ND RESPONSE
MAXIMUM OPERATING TEMP 165.0 DEG FAHRENHEIT SINGLE RESPONSE
VALVE OPERATION METHOD AUTOMATIC
CONNECTION TYPE UNTHREADED INTERNAL PIPE ALL ENDS
CONNECTION STYLE G30B SOCKET WITH BRAZING RING ALL ENDS
NOMINAL PIPE SIZE ACCOMMODATED 0.500 INCHES ALL ENDS
BONNET TYPE INSIDE SPRING
BONNET ATTACHMENT METHOD PRESSURE SEAL, RING TYPE
DISK LOADING METHOD SPRING
ADJUSTABLE PRESSURE RANGE 1401.0 TO 2900.0 POUNDS PER SQUARE INCH
SPECIAL FEATURES ADJUSTMENT LEVER INCLUDED
III END ITEM IDENTIFICATION USNS HENRY J. KAISER CLASS TAO

Restrictions/Controls & Freight Information | NSN 4820-01-255-6158

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 4820-01-255-6158

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
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