The Valve,gate, cataloged under National Stock Number 4820-00-143-9405, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Walworth Company. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-143-9405 |
| Primary Part Number | N10656-50-23 |
| Item Name | Valve,gate |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Walworth Company |
| Status | ACTIVE |
| Inlet Relationship with Outlet | IDENTICAL |
| Nominal Pipe Size Accommodated | 4.000 INCHES IN |
| Maximum Operating Temp and Media for Which Designed | 975.0 FAHRENHEIT STEAM DEGF |
| Operating Pressure and Type | 600.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS |
| Stem Type | RISING |
| Valve Size | 4.000 INCHES IN |
| Features Provided | BONNET PACKING |
| Bonnet Type | OUTSIDE SCREW-YOKE |
| Nondefinitive Spec/std Data | B COMPOSITION |
| Bonnet Attachment Method | BOLTED |
| Material | COBALT ALLOY DISK |
| Material | COBALT ALLOY SEAT |
| Material | NICKEL ALLOY BODY |
| Material | STEEL CORROSION RESISTING STEM |
| Valve Operation Method | MANUAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| N10656-50-23 | The Walworth Company (USA) |
| Reference | Meaning |
|---|---|
| MILV18110 | 5/9 Secondary reference U.S. Government activity |
| MIL-DTL-18110 | 4/1 Identification reference U.S. Government activity |
NSN 4820-00-143-9405 is a Valve,gate, manufactured by The Walworth Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-143-9405 has 1 manufacturer part number on file: N10656-50-23 (The Walworth Company).
Key specifications for N10656-50-23: Inlet Relationship with Outlet: IDENTICAL; Nominal Pipe Size Accommodated: 4.000 INCHES IN; Maximum Operating Temp and Media for Which Designed: 975.0 FAHRENHEIT STEAM DEGF; Operating Pressure and Type: 600.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS. 15 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.