Product Details | SAFETY RELIEF VALVE

4820-01-265-7137 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: E20155N51M, 4820-01-265-7137, 01-265-7137, 4820012657137, 012657137

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 17 OCT 1987 01-265-7137

Drawings & Photos | NSN 4820-01-265-7137


Demand History | NSN 4820-01-265-7137

Part Number Request Date QTY Origin
2015501S0106 2025-10-287 1 DIBBS
E20155N51M 2024-12-344 2 DIBBS
E20155N51M 2024-02-36 2 DIBBS
E20155N51M 2024-01-25 2 DIBBS
E20155N51M 2024-01-01 1 DIBBS
E20155N51M 2023-11-332 1 DIBBS
E20155N51M 2023-05-128 2 DIBBS
E20155N51M 2023-04-117 2 DIBBS
E20155N51M 2022-08-220 2 DIBBS
E20155N51M 2022-07-209 2 DIBBS
E20155N51M 2022-07-188 1 DIBBS
E20155N51M 2022-05-128 1 DIBBS
E20155N51M 2022-04-102 1 DIBBS

Cross Reference | NSN 4820-01-265-7137

Part Number Cage Code Manufacturer
E20155N51M 01343 ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY
E20155N51M 15187 PENTAIR VALVES & CONTROLS US LP DBA NAVY PRODUCT TEAM

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Technical Data | NSN 4820-01-265-7137

Characteristic Specifications
MATERIAL COPPER ALLOY BODY NICKEL ALLOY FLOW CONTROL DEVICE NICKEL ALLOY SEAT NICKEL ALLOY STEM
STYLE DESIGNATOR C1 ANGLE
FLOW CONTROL DEVICE DISK
MEDIA FOR WHICH DESIGNED GAS, INERT SINGLE RESPONSE
MAXIMUM OPERATING PRESSURE 150.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP 150.0 DEG FAHRENHEIT SINGLE RESPONSE
VALVE OPERATION METHOD AUTOMATIC
CONNECTION TYPE FLANGE 1ST END UNTHREADED INTERNAL TUBE 2ND END
CONNECTION STYLE G30A SOCKET WITH BRAZING RING 2ND END
FLANGE SHAPE ROUND WITH HOLES 1ST END
NOMINAL OUTSIDE DIAMETER 3.500 INCHES 1ST END
NOMINAL THICKNESS 0.312 INCHES 1ST END
BOLT HOLE QUANTITY 4 1ST END
BOLT HOLE NOMINAL DIAMETER 0.625 INCHES 1ST END
BOLT CIRCLE NOMINAL DIAMETER 2.375 INCHES 1ST END
FLANGE FACE DESIGN PLAIN 1ST END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED 0.500 INCHES 2ND END
BONNET TYPE INSIDE SCREW
BONNET ATTACHMENT METHOD BOLTED
ADJUSTABLE PRESSURE RANGE 106.0 TO 120.0 POUNDS PER SQUARE INCH

Restrictions/Controls & Freight Information | NSN 4820-01-265-7137

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 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 4820-01-265-7137

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