Product Details | SAFETY RELIEF VALVE

4820-01-520-4351 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: B165113, B16511-3, 4820-01-520-4351, 01-520-4351, 4820015204351, 015204351

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 12 MAY 2004 01-520-4351

Drawings & Photos | NSN 4820-01-520-4351


Demand History | NSN 4820-01-520-4351

Part Number Request Date QTY Origin
B16511-3 2024-07-192 1 DIBBS
4820-01-520-4351 2024-05-142 1 United States
B16511-3 2023-12-345 16 DIBBS
B16511-3 2023-10-284 1 DIBBS
B16511-3 2023-08-233 4 DIBBS
B16511-3 2023-06-166 3 DIBBS
B16511-3 2022-11-313 1 DIBBS
B16511-3 2022-05-143 8 DIBBS
B16511-3 2022-05-131 8 DIBBS
B16511-3 2022-04-111 7 DIBBS
B16511-3 2022-04-100 7 DIBBS
B16511-3 2022-04-91 1 DIBBS
B16511-3 2022-03-79 1 DIBBS
4820-01-520-4351 2021-04-113 4 US
4820-01-520-4351 2021-01-05 2 US
B16511-3 2021-01-03 3 DIBBS
B16511-3 2020-12-352 4 DIBBS
B16511-3 2020-12-338 4 DIBBS
B165113 2020-04-113 1 US
4820-01-520-4351 2020-04-113 1 US
B16511-3 2020-03-62 11 DIBBS
B16511-3 2020-02-37 4 DIBBS
B16511-3 2019-11-317 4 DIBBS
B16511-3 2019-08-234 4 DIBBS
B16511-3 2019-03-66 4 DIBBS
4820-01-520-4351 2018-11-305 4 DIBBS
B165113 2018-10-277 1 us
4820-01-520-4351 2018-08-221 3 DIBBS
4820-01-520-4351 2018-04-110 1 US
4820-01-520-4351 2018-02-39 4 DIBBS
4820-01-520-4351 2018-01-28 4 DIBBS
4820-01-520-4351 2017-09-262 4 DIBBS
4820-01-520-4351 2017-04-106 9 DIBBS
4820-01-520-4351 2016-07-195 4 DIBBS
4820-01-520-4351 2016-06-153 1 United States
4820-01-520-4351 2016-04-95 8 DIBBS
4820-01-520-4351 2015-07-187 5 DIBBS
4820-01-520-4351 2015-06-175 5 DIBBS
4820-01-520-4351 2015-03-79 5 DIBBS
4820-01-520-4351 2015-03-68 5 DIBBS
4820-01-520-4351 2014-07-210 1 DIBBS-RFPs
4820-01-520-4351 2013-11-319 6 DIBBS
4820-01-520-4351 2013-10-304 6 DIBBS
4820-01-520-4351 2013-05-151 1 US
4820-01-520-4351 2013-01-11 9 DIBBS
4820-01-520-4351 2010-10-302 9 DIBBS
4820-01-520-4351 2010-08-225 6 DIBBS
4820-01-520-4351 2010-03-83 15 DIBBS
4820-01-520-4351 2010-03-67 7 DIBBS
4820-01-520-4351 2010-01-22 2 DIBBS
4820-01-520-4351 2009-11-320 13 DIBBS
4820-01-520-4351 2009-08-243 1 DIBBS
4820-01-520-4351 2009-08-227 1 DIBBS
4820-01-520-4351 2009-07-184 1 DIBBS
4820-01-520-4351 2009-05-143 1 DIBBS
4820-01-520-4351 2009-01-27 22 DIBBS

Cross Reference | NSN 4820-01-520-4351

Part Number Cage Code Manufacturer
B16511-3 04577 CARLETON TECHNOLOGIES INC

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Technical Data | NSN 4820-01-520-4351

Characteristic Specifications
MATERIAL STEEL CORROSION RESISTING BODY
STYLE DESIGNATOR A7A ANGLE FLANGED ENDS
FIRST CONNECTION FACE TO CENTERLINE DISTANCE 5.000 INCHES
SECOND CONNECTION FACE TO CENTERLINE DISTANCE 5.000 INCHES
VALVE SIZE 2.000 INCHES
FLOW CONTROL DEVICE POPPET
MAXIMUM OPERATING PRESSURE 85.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP 150.0 DEG FAHRENHEIT SINGLE RESPONSE
VALVE OPERATION METHOD AUTOMATIC
CONNECTION TYPE FLANGE ALL ENDS
FLANGE SHAPE ROUND WITH HOLES ALL ENDS
NOMINAL OUTSIDE DIAMETER 6.000 INCHES ALL ENDS
NOMINAL THICKNESS 0.750 INCHES ALL ENDS
BOLT HOLE QUANTITY 4 ALL ENDS
BOLT HOLE NOMINAL DIAMETER 0.750 INCHES ALL ENDS
BOLT CIRCLE NOMINAL DIAMETER 4.750 INCHES ALL ENDS
FLANGE FACE DESIGN RAISED STRAIGHT ALL ENDS
RAISED FACE NOMINAL HEIGHT 0.060 INCHES ALL ENDS
RAISED FACE NOMINAL DIAMETER 3.620 INCHES ALL ENDS
BONNET TYPE INSIDE SPRING
BONNET ATTACHMENT METHOD BOLTED
DISK LOADING METHOD SPRING
OPENING PRESSURE SETTING 75.0 POUNDS PER SQUARE INCH
SPECIAL FEATURES MEDIA: HFC-236FA REFRIGERENT OR ISO 46 POE LUBRICANT
TEST DATA DOCUMENT MIL-STD-167-1 BY COMMANDER NAVAL SEA SYSTEMS LETTER 9514 SER 05L2/027. 22 FEB 2002 STANDARD

Restrictions/Controls & Freight Information | NSN 4820-01-520-4351

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
Electro-static Discharge Susceptible:ANo known Electrostatic Discharge (ESD) or Electromagnetic Interference (EMI) sensitivity
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 4820-01-520-4351

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