Product Details | CHECK VALVE

4820-01-421-2587 A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.

Part Alternates: B15SW 2 1/2IN, B15SW-2.50IN, B15SW212IN, B15SW250IN, 4820-01-421-2587, 01-421-2587, 4820014212587, 014212587

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 03 NOV 1995 01-421-2587

Drawings & Photos | NSN 4820-01-421-2587


Demand History | NSN 4820-01-421-2587

Part Number Request Date QTY Origin
4820-01-421-2587 2025-10-275 1 IN

Cross Reference | NSN 4820-01-421-2587

Part Number Cage Code Manufacturer
B15SW 2 1/2IN 79342 WILLIAM E WILLIAMS, VALVE CORP DBA WILLIAMS VALVE
B15SW-2.50IN 79342 WILLIAM E WILLIAMS, VALVE CORP DBA WILLIAMS VALVE

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Technical Data | NSN 4820-01-421-2587

Characteristic Specifications
MATERIAL COPPER ALLOY 836 BODY COPPER ALLOY 836 FLOW CONTROL DEVICE COPPER ALLOY 836 SEAT
MATERIAL DOCUMENT AND CLASSIFICATION ASTM B62 ASSN STD SINGLE MATERIAL RESPONSE BODY ASTM B62 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE ASTM B62 ASSN STD SINGLE MATERIAL RESPONSE SEAT
STYLE DESIGNATOR A2A STRAIGHT THRU FLANGED ENDS
VALVE SIZE 2.500 INCHES
FACE TO FACE DISTANCE 8.500 INCHES
FLOW CONTROL DEVICE DISK
MEDIA FOR WHICH DESIGNED STEAM 1ST RESPONSE WATER-OIL-GAS 2ND RESPONSE
MAXIMUM OPERATING PRESSURE 150.0 POUNDS PER SQUARE INCH 1ST RESPONSE 225.0 POUNDS PER SQUARE INCH 2ND RESPONSE
MAXIMUM OPERATING TEMP 406.0 DEG FAHRENHEIT 1ST RESPONSE 150.0 DEG FAHRENHEIT 2ND RESPONSE
VALVE OPERATION METHOD AUTOMATIC
CONNECTION TYPE FLANGE ALL ENDS
FLANGE SHAPE ROUND WITH HOLES ALL ENDS
NOMINAL OUTSIDE DIAMETER 7.000 INCHES ALL ENDS
NOMINAL THICKNESS 0.563 INCHES ALL ENDS
BOLT HOLE QUANTITY 4 ALL ENDS
BOLT HOLE NOMINAL DIAMETER 0.875 INCHES ALL ENDS
BOLT CIRCLE NOMINAL DIAMETER 5.500 INCHES ALL ENDS
FLANGE FACE DESIGN PLAIN ALL ENDS
MOUNTING POSITION HORIZONTAL OR VERTICAL

Restrictions/Controls & Freight Information | NSN 4820-01-421-2587

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 051080 FAUCETS,BIBCOCKS,GATES VALVES
Less than car load rating
Less than truck load rating W Rating Variable
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 4820-01-421-2587

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