The Valve,check, cataloged under National Stock Number 4820-00-273-9903, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is The Walworth Company. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-273-9903 |
| Primary Part Number | 5344F |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | The Walworth Company |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Nominal Thickness | 1.000 INCHES ALL ENDS IN |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Media for Which Designed | OIL, HYDRAULIC FIRST RESPONSE |
| Valve Operation Method | AUTOMATIC |
| Maximum Operating Temp | 750.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Mounting Position | HORIZONTAL |
| Media for Which Designed | STEAM SECOND RESPONSE |
| Bolt Circle Nominal Diameter | 3.000 INCHES ALL ENDS IN |
| Media for Which Designed | WATER, FRESH THIRD RESPONSE |
| Raised Face Nominal Diameter | 4.125 INCHES ALL ENDS IN |
| Material | STEEL UNS J03002 FLOW CONTROL DEVICE |
| Flange Face Design | RAISED STRAIGHT ALL ENDS |
| Material Document and Classification | ASTM A216 GRADE WCB ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Test Data Document | 05047-ASAB16.5 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.). |
| Valve Size | 2.500 INCHES IN |
| Nominal Outside Diameter | 7.500 INCHES ALL ENDS IN |
| Bolt Hole Quantity | 8 ALL ENDS |
| Face to Face Distance | 11.500 INCHES IN |
| Material Document and Classification | ASTM A216 GRADE WCB ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Renewable Seat Ring Type | THREADED |
| Connection Type | FLANGE ALL ENDS |
| Material | STEEL CORROSION RESISTING SEAT |
| Material | STEEL UNS J03002 BODY |
| Bolt Hole Nominal Diameter | 0.875 INCHES ALL ENDS IN |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Raised Face Nominal Height | 0.062 INCHES ALL ENDS IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-00-273-9903 is a Valve,check, manufactured by The Walworth Company, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-273-9903 has 2 cross-referenced part numbers: 5344F (The Walworth Company), 3072 (Lunkenheimer Co).
There are 12 known substitutes for 4820-00-273-9903: 5950-00-043-4575, 5975-00-141-0531, 6220-00-176-0273 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 5344F: Special Features: SWING CHECK TYPE; Flow Control Device: DISK; Nominal Thickness: 1.000 INCHES ALL ENDS IN; Operating Pressure: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 29 total characteristics are documented in the Federal Logistics Information System.