The Valve,safety Relief, cataloged under National Stock Number 4820-01-528-4391, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Exceltec Intl Corp. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-528-4391 |
| Primary Part Number | 03Y61TM=-0247 REV H3 FIND 126 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Exceltec Intl Corp |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Nominal Pipe Size Accommodated | 0.250 INCHES ALL ENDS IN |
| Style Designator | ANGLE |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Adjustable Pressure Range | +5.0 TO 150.0 POUNDS PER SQUARE INCH LBS |
| Bonnet Type | INSIDE SPRING |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | INTEGRAL |
| Media for Which Designed | WATER, FRESH SECOND RESPONSE |
| Media for Which Designed | WATER, SALT FIRST RESPONSE |
| Material | PLASTIC POLYVINYL CHLORIDE (PVC) BODY |
| 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 |
|---|---|
| 03Y61TM=-0247 REV H3 FIND 126 | Exceltec Intl Corp (USA) |
| 0502 | Exceltec Intl Corp (USA) |
| 03T61TM-0250 REV F FIND 114 | Exceltec Intl Corp (USA) |
| Reference | Meaning |
|---|---|
| TVD-025V-PV | 5/9 Secondary reference Plast O Matic Valves Inc |
| RVD-025V-PV | 3/9 Design control — primary reference Plast O Matic Valves Inc |
NSN 4820-01-528-4391 is a Valve,safety Relief, manufactured by Exceltec Intl Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-528-4391 has 3 manufacturer part numbers on file: 03Y61TM=-0247 REV H3 FIND 126 (Exceltec Intl Corp), 0502 (Exceltec Intl Corp), 03T61TM-0250 REV F FIND 114 (Exceltec Intl Corp).
2 possible matches (shared part number, not a government interchangeability claim): 8465-01-614-4029, 5305-01-727-6650. Verify interchangeability with system specifications before substitution.
Key specifications for 03Y61TM=-0247 REV H3 FIND 126: Flow Control Device: DISK; Nominal Pipe Size Accommodated: 0.250 INCHES ALL ENDS IN; Style Designator: ANGLE; Operating Pressure: 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS. 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.
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.