The Valve,safety Relief, cataloged under National Stock Number 4820-01-251-7623, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ldi Industries, Inc. Dba Ldi Industries Inc. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-251-7623 |
| Primary Part Number | PRV-104-2 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ldi Industries, Inc. Dba Ldi Industries Inc |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Connection Type | THREADED EXTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 5.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Surface Treatment | CADMIUM LOCATION NOT OTHERWISE SPECIFIED |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Material | COPPER ALLOY AND STEEL OVERALL |
| Thread Series Designator | PTF-SAE SHORT ALL ENDS |
| Opening Pressure Setting | 1.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| PRV-104-2 PRIMARY | Ldi Industries, Inc. Dba Ldi Industries Inc (USA) |
| 2D3-1014 ITEM 29 | Lake Shore Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| RV104-2 | 5/9 Secondary reference Ldi Industries, Inc. Dba Ldi Industries Inc |
NSN 4820-01-251-7623 is a Valve,safety Relief, manufactured by Ldi Industries, Inc. Dba Ldi Industries Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-251-7623 has 2 manufacturer part numbers on file: PRV-104-2 (Ldi Industries, Inc. Dba Ldi Industries Inc), 2D3-1014 ITEM 29 (Lake Shore Systems, Inc.).
Key specifications for PRV-104-2: Flow Control Device: DISK; Connection Style: PLAIN (PIPE) ALL ENDS; Connection Type: THREADED EXTERNAL PIPE ALL ENDS; Style Designator: STRAIGHT THRU. 13 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.