The Valve,check, cataloged under National Stock Number 4820-00-764-1586, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-764-1586 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Nominal Pipe Size Accommodated | 1.000 INCHES FIRST END IN |
| Connection Style | BEVELED (PIPE) FIRST END |
| Criticality Code Justification | ZZZY |
| Connection Type | BUTT WELD PIPE FIRST END |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Disk Loading Method | WEIGHT |
| Media for Which Designed | STEAM SINGLE RESPONSE |
| Material | STEEL COMP 304 BODY |
| Valve Operation Method | AUTOMATIC |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY MATERIAL IN ACCORDANCE WITH ACTIVITY HXQUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| 820-2178554 | 3/1 Design control — primary reference U.S. Government activity |
| 820-2178554GP4 | 5/2 Secondary reference U.S. Government activity |
| 820-2178554-4 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 4820-00-764-1586 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-764-1586: Flow Control Device: DISK; Nominal Pipe Size Accommodated: 1.000 INCHES FIRST END IN; Connection Style: BEVELED (PIPE) FIRST END; Criticality Code Justification: ZZZY. 12 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.
NSN 4820-00-764-1586 has DEMIL Code F. Demilitarization may be required before disposal or transfer to non-military entities.
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.