Product Details | SAFETY RELIEF VALVE

4820-01-477-9754 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: SW133, SW133B01E0100, SW133B01E0100/CDS17052, SW133B01E0100CDS17052, 4820-01-477-9754, 01-477-9754, 4820014779754, 014779754

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 25 AUG 2000 01-477-9754

Drawings & Photos | NSN 4820-01-477-9754


Demand History | NSN 4820-01-477-9754

Part Number Request Date QTY Origin
SW13301E00/CDS17052 2025-08-230 1 DIBBS
SW133B01E0100 2025-08-230 1 DIBBS
SW133B01E0100/CDS17052 2025-08-230 1 DIBBS
SW13301E00/CDS17052 2025-08-217 1 DIBBS
SW133B01E0100 2025-08-217 1 DIBBS
SW133B01E0100/CDS17052 2025-08-217 1 DIBBS
SW13301E00/CDS17052 2022-10-297 1 DIBBS
SW133B01E0100 2022-10-297 1 DIBBS
SW133B01E0100/CDS17052 2022-10-297 1 DIBBS
SW13301E00/CDS17052 2022-10-286 1 DIBBS
SW133B01E0100 2022-10-286 1 DIBBS
SW133B01E0100/CDS17052 2022-10-286 1 DIBBS
SW13301E00/CDS17052 2022-10-278 1 DIBBS
SW133B01E0100 2022-10-278 1 DIBBS
SW133B01E0100/CDS17052 2022-10-278 1 DIBBS
4820-01-477-9754 2015-08-237 1 DIBBS
4820-01-477-9754 2015-08-235 1 DIBBS

Cross Reference | NSN 4820-01-477-9754

Part Number Cage Code Manufacturer
SW133 01343 ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY
SW133B01E0100 01343 ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY
SW133B01E0100 15187 PENTAIR VALVES & CONTROLS US LP DBA NAVY PRODUCT TEAM
SW133B01E0100/CDS17052 01343 ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY
SW133B01E0100/CDS17052 15187 PENTAIR VALVES & CONTROLS US LP DBA NAVY PRODUCT TEAM

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Technical Data | NSN 4820-01-477-9754

Characteristic Specifications
MATERIAL COPPER ALLOY 922 BODY NICKEL ALLOY R-405 FLOW CONTROL DEVICE NICKEL ALLOY R-405 SEAT NICKEL ALLOY R-405 STEM
MATERIAL DOCUMENT AND CLASSIFICATION ASTMB-61 ASSN STD SINGLE MATERIAL RESPONSE BODY QQ-N-281 OR ASTM B164 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE QQ-N-281 OR ASTM B164 FED SPEC SINGLE MATERIAL RESPONSE SEAT QQ-N-281 OR ASTM B164 FED SPEC SINGLE MATERIAL RESPONSE STEM
STYLE DESIGNATOR C1 ANGLE
FLOW CONTROL DEVICE DISK
MAXIMUM OPERATING PRESSURE 400.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP 165.0 DEG FAHRENHEIT SINGLE RESPONSE
VALVE OPERATION METHOD AUTOMATIC
CONNECTION TYPE THREADED EXTERNAL PIPE ALL ENDS
CONNECTION STYLE G46A PLAIN ALL ENDS
RENEWABLE SEAT RING TYPE PRESSED-IN
BONNET TYPE INSIDE SPRING
BONNET ATTACHMENT METHOD BOLTED
DISK LOADING METHOD SPRING
OPENING PRESSURE SETTING 100.0 POUNDS PER SQUARE INCH
FURNISHED ITEMS AND QUANTITY 1 CAP AND 1 LOCKING DEVICE
SPECIAL FEATURES SPRING MATERIAL IS STAINLESS STEEL; VENT MUST BE OPEN TO ATMOSPHERE OR PIPED TO DOWNSTREAM PIPING
III PART NAME ASSIGNED BY CONTROLLING AGENCY 1/2" RELIEF VALVE TYP 1551-T

Restrictions/Controls & Freight Information | NSN 4820-01-477-9754

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 4820-01-477-9754

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
ReparabilityDField Level Reparables
Acquisition Advice CodesJNOT STOCKED, CENTRALLY PROCURED # (NON-STOCKED ITEMS) IMM/Service centrally managed but not stocked item. Procurement will be initiated only after receipt of a requisition.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each