The Valve,check, cataloged under National Stock Number 4820-01-310-4256, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is William E Williams Valve Corp. Government technical data includes 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-310-4256 |
| Primary Part Number | 151F-5 4.00IPS 8994 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | William E Williams Valve Corp |
| Status | ACTIVE |
| Nominal Outside Diameter | 9.000 INCHES ALL ENDS IN |
| Nominal Thickness | 0.937 INCHES ALL ENDS IN |
| Raised Face Nominal Height | 0.062 INCHES ALL ENDS IN |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Bolt Hole Nominal Diameter | 0.750 INCHES ALL ENDS IN |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Raised Face Nominal Diameter | 3.500 INCHES ALL ENDS IN |
| Bolt Circle Nominal Diameter | 7.500 INCHES ALL ENDS IN |
| Flange Face Design | RAISED STRAIGHT ALL ENDS |
| Face to Face Distance | 11.500 INCHES IN |
| Mounting Position | HORIZONTAL |
| Bolt Hole Quantity | 8 ALL ENDS |
| Material Document and Classification | ASTM A216 GRADE WCB ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Valve Operation Method | AUTOMATIC |
| Material | STEEL UNS J03002 BODY |
| Material | NICKEL ALLOY SEAT |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Connection Type | FLANGE ALL ENDS |
| Valve Size | 4.000 INCHES IN |
| Flow Control Device | DISK |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 151F-5 4.00IPS 8994 PRIMARY | William E Williams Valve Corp (USA) |
| 8994 | William E Williams Valve Corp (USA) |
NSN 4820-01-310-4256 is a Valve,check, manufactured by William E Williams Valve Corp, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-310-4256 has 2 cross-referenced part numbers: 151F-5 4.00IPS 8994 (William E Williams Valve Corp), 8994 (William E Williams Valve Corp).
There are 7 known substitutes for 4820-01-310-4256: 5935-00-173-5721, 5360-00-291-5120, 5935-00-577-2484 and 4 more. Verify interchangeability with system specifications before substitution.
Key specifications for 151F-5 4.00IPS 8994: Nominal Outside Diameter: 9.000 INCHES ALL ENDS IN; Nominal Thickness: 0.937 INCHES ALL ENDS IN; Raised Face Nominal Height: 0.062 INCHES ALL ENDS IN; Operating Pressure: 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 21 total characteristics are documented in the Federal Logistics Information System.