The Valve,safety Relief, cataloged under National Stock Number 4820-01-032-5698, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-032-5698 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Recess Nominal Depth | 0.115 INCHES ALL ENDS IN |
| Flange Shape | ROUND ALL ENDS |
| Flange Face Design | RECESSED WITH GASKET GROOVE ALL ENDS |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Material Document and Classification | FED STD 66,AISI 304L/SAE 30304L FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Operating Pressure | 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 0.250 INCHES IN |
| Maximum Operating Temp | 165.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Second Connection Face to Centerline Distance | 1.500 INCHES IN |
| Nominal Outside Diameter | 1.750 INCHES ALL ENDS IN |
| Disk Loading Method | SPRING |
| Surface Treatment | PASSIVATE LOCATION NOT OTHERWISE SPECIFIED |
| Media for Which Designed | AIR SINGLE RESPONSE |
| First Connection Face to Centerline Distance | 1.405 INCHES IN |
| Material | STEEL COMP 304L OVERALL |
| Opening Pressure Setting | 270.0 POUNDS PER SQUARE INCH LBS |
| Valve Discharge Flow Rate | 20.0 CUBIC FEET PER MINUTE |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 0.320 INCHES ALL ENDS IN |
| Recess Nominal Diameter | 1.060 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 |
| Reference | Meaning |
|---|---|
| P87-344 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-032-5698 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-032-5698: Flow Control Device: POPPET; Recess Nominal Depth: 0.115 INCHES ALL ENDS IN; Flange Shape: ROUND ALL ENDS; Flange Face Design: RECESSED WITH GASKET GROOVE ALL ENDS. 22 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.