Product Details | SAFETY RELIEF VALVE

4820-00-203-0068 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: 4844501722037PCV11, 484-4501-722037PCV11, 4844501722037PCV12, 484-4501-722037PCV12, 4844501722037PCV6, 484-4501-722037PCV6, 4884501720376PCV11, 488-4501-720376PCV11, 4884501720376PCV12, 488-4501-720376PCV12, 4884501720376PCV6, 488-4501-720376PCV6, 4894501722026PCV11, 489-4501-722026PCV11, 5053225PCV11, 5053-225PCV11, 5053228PCV11, 5053-228PCV11, 5053275PCV7, 5053-275PCV7, 5053292PCV2, 5053-292PCV2, 5053292PCV3, 5053-292PCV3, 5053292PCV6, 5053-292PCV6, 5053381PCV6, 5053-381PCV6, 5053405PCV11, 5053-405PCV11, 5053405PCV5, 5053-405PCV5, 5053417PCV11, 5053-417PCV11, 5053417PCV12, 5053-417PCV12, 5053417PCV6, 5053-417PCV6, 5053419PCV11, 5053-419PCV11, 5053419PCV12, 5053-419PCV12, 5053419PCV6, 5053-419PCV6, 5053484PCV11, 5053-484PCV11, 5053484PCV12, 5053-484PCV12, 5053484PCV6, 5053-484PCV6, 5053488PCV11, 5053-488PCV11, 5053488PCV12, 5053-488PCV12, 5053488PCV6, 5053-488PCV6, 5061381PCV25, 5061-381PCV25, 5069405PCV20, 5069-405PCV20, 5074477PCV11, 5074-477PCV11, 5074489PCV11, 5074-489PCV11, 22845057PCV11, 228-45-057PCV11, 22845083PCV7, 228-45-083PCV7, 22845091PCV2, 228-45-091PCV2, 22845091PCV3, 228-45-091PCV3, 22845091PCV6, 228-45-091PCV6, 381450112235PCV6, 381-4501-12235PCV6, 381458PCV25, 381-45-8PCV25, 38545001194345PCV5, 385-4500-1194345PCV5, 38545001194347PCV16, 385-4500-1194347PCV16, 38545001225027PCV20, 385-4500-1225027PCV20, 405450068751PCV11, 405-4500-68751PCV11, 405450068751PCV5, 405-4500-68751PCV5, 405450369182PCVF0, 405-4503-69182PCVF0, 41045001225028PCV20, 410-4500-1225028PCV20, 4164501162028PCV25, 416-4501-162028PCV25, 4164501162029PCV20, 416-4501-162029PCV20, 417450068750PCV11, 417-4500-68750PCV11, 417450068750PCV12, 417-4500-68750PCV12, 41845001194342PCV10, 418-4500-1194342PCV10, 41845001194342PCV6, 418-4500-1194342PCV6, 4194501724462PCV11, 419-4501-724462PCV11, 4194501724462PCV12, 419-4501-724462PCV12, 4194501724462PCV6, 419-4501-724462PCV6, 4774501722051PCV11, 477-4501-722051PCV11, 4820-00-203-0068, 00-203-0068, 4820002030068, 002030068

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 01 JAN 1961 00-203-0068

Drawings & Photos | NSN 4820-00-203-0068


Cross Reference | NSN 4820-00-203-0068

Part Number Cage Code Manufacturer
228-45-057PCV11 80064 NAVAL SHIP SYSTEMS COMMAND
228-45-083PCV7 80064 NAVAL SHIP SYSTEMS COMMAND
228-45-091PCV2 80064 NAVAL SHIP SYSTEMS COMMAND
228-45-091PCV3 80064 NAVAL SHIP SYSTEMS COMMAND
228-45-091PCV6 80064 NAVAL SHIP SYSTEMS COMMAND
381-45-8PCV25 80064 NAVAL SHIP SYSTEMS COMMAND
381-4501-12235PCV6 80064 NAVAL SHIP SYSTEMS COMMAND
385-4500-1194345PCV5 80064 NAVAL SHIP SYSTEMS COMMAND
385-4500-1194347PCV16 80064 NAVAL SHIP SYSTEMS COMMAND
385-4500-1225027PCV20 80064 NAVAL SHIP SYSTEMS COMMAND
405-4500-68751PCV11 80064 NAVAL SHIP SYSTEMS COMMAND
405-4500-68751PCV5 80064 NAVAL SHIP SYSTEMS COMMAND
405-4503-69182PCVF0 80064 NAVAL SHIP SYSTEMS COMMAND
410-4500-1225028PCV20 80064 NAVAL SHIP SYSTEMS COMMAND
416-4501-162028PCV25 80064 NAVAL SHIP SYSTEMS COMMAND
416-4501-162029PCV20 80064 NAVAL SHIP SYSTEMS COMMAND
417-4500-68750PCV11 80064 NAVAL SHIP SYSTEMS COMMAND
417-4500-68750PCV12 80064 NAVAL SHIP SYSTEMS COMMAND
418-4500-1194342PCV10 80064 NAVAL SHIP SYSTEMS COMMAND
418-4500-1194342PCV6 80064 NAVAL SHIP SYSTEMS COMMAND
419-4501-724462PCV11 80064 NAVAL SHIP SYSTEMS COMMAND
419-4501-724462PCV12 80064 NAVAL SHIP SYSTEMS COMMAND
419-4501-724462PCV6 80064 NAVAL SHIP SYSTEMS COMMAND
477-4501-722051PCV11 80064 NAVAL SHIP SYSTEMS COMMAND
484-4501-722037PCV11 80064 NAVAL SHIP SYSTEMS COMMAND
484-4501-722037PCV12 80064 NAVAL SHIP SYSTEMS COMMAND
484-4501-722037PCV6 80064 NAVAL SHIP SYSTEMS COMMAND
488-4501-720376PCV11 80064 NAVAL SHIP SYSTEMS COMMAND
488-4501-720376PCV12 80064 NAVAL SHIP SYSTEMS COMMAND
488-4501-720376PCV6 80064 NAVAL SHIP SYSTEMS COMMAND
489-4501-722026PCV11 80064 NAVAL SHIP SYSTEMS COMMAND
5053-225PCV11 81316 PORTSMOUTH NAVAL SHIPYARD
5053-228PCV11 81316 PORTSMOUTH NAVAL SHIPYARD
5053-275PCV7 81316 PORTSMOUTH NAVAL SHIPYARD
5053-292PCV2 81316 PORTSMOUTH NAVAL SHIPYARD
5053-292PCV3 81316 PORTSMOUTH NAVAL SHIPYARD
5053-292PCV6 81316 PORTSMOUTH NAVAL SHIPYARD
5053-381PCV6 81316 PORTSMOUTH NAVAL SHIPYARD
5053-405PCV11 81316 PORTSMOUTH NAVAL SHIPYARD
5053-405PCV5 81316 PORTSMOUTH NAVAL SHIPYARD
5053-417PCV11 81316 PORTSMOUTH NAVAL SHIPYARD
5053-417PCV12 81316 PORTSMOUTH NAVAL SHIPYARD
5053-417PCV6 81316 PORTSMOUTH NAVAL SHIPYARD
5053-419PCV11 81316 PORTSMOUTH NAVAL SHIPYARD
5053-419PCV12 81316 PORTSMOUTH NAVAL SHIPYARD
5053-419PCV6 81316 PORTSMOUTH NAVAL SHIPYARD
5053-484PCV11 81316 PORTSMOUTH NAVAL SHIPYARD
5053-484PCV12 81316 PORTSMOUTH NAVAL SHIPYARD
5053-484PCV6 81316 PORTSMOUTH NAVAL SHIPYARD
5053-488PCV11 81316 PORTSMOUTH NAVAL SHIPYARD
5053-488PCV12 81316 PORTSMOUTH NAVAL SHIPYARD
5053-488PCV6 81316 PORTSMOUTH NAVAL SHIPYARD
5061-381PCV25 81316 PORTSMOUTH NAVAL SHIPYARD
5069-405PCV20 81316 PORTSMOUTH NAVAL SHIPYARD
5074-477PCV11 81316 PORTSMOUTH NAVAL SHIPYARD
5074-489PCV11 81316 PORTSMOUTH NAVAL SHIPYARD

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Technical Data | NSN 4820-00-203-0068

Characteristic Specifications
MATERIAL COPPER ALLOY BODY COPPER ALLOY FLOW CONTROL DEVICE COPPER ALLOY SEAT STEEL STEM
STYLE DESIGNATOR C1 ANGLE
FLOW CONTROL DEVICE DISK
MEDIA FOR WHICH DESIGNED STEAM SINGLE RESPONSE
MAXIMUM OPERATING PRESSURE 150.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP 366.0 DEG FAHRENHEIT SINGLE RESPONSE
VALVE OPERATION METHOD AUTOMATIC
CONNECTION TYPE THREADED INTERNAL PIPE 1ST END THREADED EXTERNAL PIPE 2ND END
CONNECTION STYLE G9 PLAIN 1ST END G46B PLAIN 2ND END
NOMINAL PIPE SIZE ACCOMMODATED 1.000 INCHES 1ST END 1.000 INCHES 2ND END
THREAD SERIES DESIGNATOR NPT 1ST END NPT 2ND END
NOMINAL THREAD SIZE 1.000 INCHES 1ST END 1.000 INCHES 2ND END
THREAD DIRECTION RIGHT-HAND 1ST END RIGHT-HAND 2ND END
BONNET TYPE INSIDE SPRING
BONNET ATTACHMENT METHOD THREADED
DISK LOADING METHOD SPRING
ADJUSTABLE PRESSURE RANGE 5.0 TO 25.0 POUNDS PER SQUARE INCH
FEATURES PROVIDED BONNET PACKING AND PRESSURE TIGHT OUTLET SIDE

Restrictions/Controls & Freight Information | NSN 4820-00-203-0068

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:UPrecious metal type is unknown
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 XX
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 4820-00-203-0068

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 CodesXSEMIACTIVE ITEM-NO REPLACEMENT (NON-STOCKED ITEMS) A potentially inactive NSN which must be retained in the supply system as an item of supply because (1) stocks of the item are on hand or in use below the wholesale level and (2) the NSN is cited in equipment authorization documents TO & E, TA, TM, etc., or in-use assets are being reported. 1. Items are authorized for central procurement but not authorized for stockage at wholesale level. 2. Requisitions for in-use replacement will be authorized in accordance with individual Military Service directives. 3. Requisitions may be submitted as requirements generate. Repetitive demands may dictate an AAC change to permit wholesale stockage.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each