The Valve,safety Relief, cataloged under National Stock Number 4820-01-479-9722, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Schneider Electric Systems Usa Inc. Government technical data includes 20 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-479-9722 |
| Primary Part Number | RP-1066-A1/E76L385 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Schneider Electric Systems Usa Inc |
| Status | ACTIVE |
| Flow Control Device | DIAPHRAGM |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Nominal Pipe Size Accommodated | 3.000 INCHES ALL ENDS IN |
| Flange Face Design | PLAIN ALL ENDS |
| Bolt Circle Nominal Diameter | 6.000 INCHES ALL ENDS IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS NOTE:TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY. |
| Bolt Hole Nominal Diameter | 0.750 INCHES ALL ENDS IN |
| Operating Pressure | 25.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 3.000 INCHES IN |
| Adjustable Pressure Range | +3.0 TO 25.0 POUNDS PER SQUARE INCH LBS |
| Nominal Outside Diameter | 7.500 INCHES ALL ENDS IN |
| Disk Loading Method | SPRING |
| Bolt Hole Quantity | 4 ALL ENDS |
| Face to Face Distance | 8.625 INCHES IN |
| Media for Which Designed | STEAM SECOND RESPONSE |
| Media for Which Designed | LIQUID FIRST RESPONSE |
| Material | IRON CAST BODY |
| Valve Operation Method | AIR |
| Nominal Thickness | 0.750 INCHES ALL ENDS IN |
| 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 |
|---|---|
| RP-1066-A1/E76L385 PRIMARY | Schneider Electric Systems Usa Inc (USA) |
NSN 4820-01-479-9722 is a Valve,safety Relief, manufactured by Schneider Electric Systems Usa Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-479-9722 has 1 manufacturer part number on file: RP-1066-A1/E76L385 (Schneider Electric Systems Usa Inc).
Key specifications for RP-1066-A1/E76L385: Flow Control Device: DIAPHRAGM; Flange Shape: ROUND WITH HOLES ALL ENDS; Nominal Pipe Size Accommodated: 3.000 INCHES ALL ENDS IN; Flange Face Design: PLAIN ALL ENDS. 20 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.