The Valve,safety Relief, cataloged under National Stock Number 4820-01-487-5108, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 24 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-487-5108 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Renewable Seat Ring Type | PRESSED-IN |
| Nominal Pipe Size Accommodated | 1.500 INCHES FIRST END IN |
| Nominal Pipe Size Accommodated | 0.500 INCHES SECOND END IN |
| Connection Style | SOCKET FIRST END |
| Connection Style | SOCKET SECOND END |
| Minimum Operating Temp | 40.0 FAHRENHEIT DEGF |
| Connection Type | UNTHREADED INTERNAL PIPE FIRST END |
| Connection Type | UNTHREADED INTERNAL PIPE SECOND END |
| Style Designator | ANGLE |
| Material Document and Classification | 6/12 ANNEALED L+410/ASTM-D4066 ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Material Document and Classification | ASTM-B369 ALLOY C96400 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-N-286 GRADE 500 AND QQ-N-281 CLASS A FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Operating Pressure | 125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Bonnet Type | INSIDE SPRING |
| Maximum Operating Temp | 104.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | THREADED |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Material | COPPER ALLOY 964 BODY |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material | PLASTIC POLYAMIDE NYLON SEAT |
| Opening Pressure Setting | 114.0 POUNDS PER SQUARE INCH LBS |
| Valve Discharge Flow Rate | 285.0 CUBIC FEET PER MINUTE |
| 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 |
| Reference | Meaning |
|---|---|
| V1E10565-01 | 3/2 Design control — primary reference U.S. Government activity |
| V1E10565 | D/9 Drawing number reference only U.S. Government activity |
NSN 4820-01-487-5108 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
9 possible matches (shared part number, not a government interchangeability claim): 4820-01-487-5157, 4820-01-487-5173, 4820-01-487-5258. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-487-5108: Renewable Seat Ring Type: PRESSED-IN; Nominal Pipe Size Accommodated: 1.500 INCHES FIRST END IN; Nominal Pipe Size Accommodated: 0.500 INCHES SECOND END IN; Connection Style: SOCKET FIRST END. 24 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.