Product Details | SAFETY RELIEF VALVE

4820-01-494-9660 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: SSRL4M8F8, SS-RL4M8F8, 1000113244 , 4820-01-494-9660, 01-494-9660, 4820014949660, 014949660

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 01 MAR 2002 01-494-9660

Drawings & Photos | NSN 4820-01-494-9660


Demand History | NSN 4820-01-494-9660

Part Number Request Date QTY Origin
SS-RL4M8F8 2023-08-236 11 DIBBS
SS-RL4M8F8 2020-05-128 16 DIBBS
4820-01-494-9660 2016-11-329 21 DIBBS
4820-01-494-9660 2014-02-54 17 DIBBS
4820-01-494-9660 2012-04-114 3 DIBBS
4820-01-494-9660 2012-02-40 5 DIBBS
4820-01-494-9660 2010-07-189 6 DIBBS

Cross Reference | NSN 4820-01-494-9660

Part Number Cage Code Manufacturer
1000113244 AG283 ANSALDO SISTEMI INDUSTRIALI SPA
SS-RL4M8F8 02570 SWAGELOK COMPANY DBA USE CAGE CODE 3T9T9 FOR

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Technical Data | NSN 4820-01-494-9660

Characteristic Specifications
MATERIAL STEEL COMP 316 BODY STEEL COMP 316 FLOW CONTROL DEVICE STEEL COMP 316 STEM
MATERIAL DOCUMENT AND CLASSIFICATION A182 ASSN STD SINGLE MATERIAL RESPONSE BODY A479 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE A479 ASSN STD SINGLE MATERIAL RESPONSE STEM
FLOW CONTROL DEVICE DISK
MAXIMUM OPERATING PRESSURE 300.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
VALVE OPERATION METHOD AIR
CONNECTION TYPE THREADED EXTERNAL PIPE 1ST END THREADED INTERNAL PIPE 2ND END
CONNECTION STYLE G46B PLAIN 1ST END G9 PLAIN 2ND END
THREAD SERIES DESIGNATOR NPT ALL ENDS
NOMINAL THREAD SIZE 0.500 INCHES ALL ENDS
THREAD DIRECTION RIGHT-HAND ALL ENDS
SPECIAL FEATURES RL4 SERIES HAS A MANUAL OVERRIDE HANDLE

Restrictions/Controls & Freight Information | NSN 4820-01-494-9660

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.
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 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 4820-01-494-9660

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