The Valve,pressure Equalizing,gaseou, cataloged under National Stock Number 4820-01-044-3150, 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24 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-044-3150 |
| Item Name | Valve,pressure Equalizing,gaseou |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | CONE |
| First End Thread Direction | RIGHT-HAND |
| Temp Rating | -80.0 FAHRENHEIT AND 300.0 FAHRENHEIT DEGF |
| Surface Treatment Document and Classification | MIL-A-8625, TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE |
| Surface Treatment Document and Classification | MIL-A-8625, TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Body Style | SINGLE CONNECTION, STRAIGHT FLOW |
| First End Thread Class | 2A A |
| First End Style Designator | EXTERNAL SEAT FOR GASKET SEAL |
| Material Document and Classification | QQ-A-225/3, ALLOY 2011, T3 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-A-225/3, ALLOY 2011, T3 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | QQ-A-225/3, ALLOY 2011, T3 FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| End Connection Quantity | 1 |
| Operating Pressure | 3.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Valve Venting Design Type | ATMOSPHERIC |
| Opening Pressure Setting | ERR-060 |
| Disk Loading Method | WEIGHT |
| First End Connection Type | THREADED EXTERNAL BOSS |
| Surface Treatment | ANODIZE OUTSIDE |
| Material | ALUMINUM ALLOY 2011 BODY |
| Material | ALUMINUM ALLOY 2011 AND RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE |
| Material | ALUMINUM ALLOY 2011 SEAT |
| Media for Which Designed | AIR |
| Furnished Items | GASKET AND NUT AND FILTER SCREEN |
| Valve Relief Design Type | PRESSURE |
| 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 |
|---|---|
| SM-C-774135-1 | 5/2 Secondary reference U.S. Government activity |
| SM-C-774135 | 5/2 Secondary reference U.S. Government activity |
| 750RP3.0 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-044-3150 is a Valve,pressure Equalizing,gaseou, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-078-4789. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-044-3150: Flow Control Device: CONE; First End Thread Direction: RIGHT-HAND; Temp Rating: -80.0 FAHRENHEIT AND 300.0 FAHRENHEIT DEGF; Surface Treatment Document and Classification: MIL-A-8625, TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE. 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.