The Valve,safety Relief, cataloged under National Stock Number 4820-01-350-3232, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-350-3232 |
| Primary Part Number | 44303-2120CP |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Style Designator | ANGLE |
| Operating Pressure | 3800.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Bonnet Type | INSIDE SPRING |
| Disk Loading Method | SPRING |
| Media for Which Designed | OXYGEN, LIQUID SINGLE RESPONSE |
| Material | STEEL COMP 316 BODY |
| Material | PLASTIC POLYCHLOROTRIFLUOROETHYLENE SEAT |
| Opening Pressure Setting | 3300.0 POUNDS PER SQUARE INCH LBS |
| Valve Discharge Flow Rate | 1610.0 CUBIC FEET PER MINUTE |
| Reference Number Differentiating Characteristics | CLEANING, PACKAGING, AND MARKING IAW THE LATEST REVISION OF MIL-STD-1330 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 44303-2120CP | Naval Inventory Control Point Mechanicsburg (USA) |
| 44303-2120 .50IPS 3300PSI SET | Fluid Mechanics Valve Company (USA) |
| Reference | Meaning |
|---|---|
| 44303-2120 | 3/1 Design control — primary reference Fluid Mechanics Valve Company |
NSN 4820-01-350-3232 is a Valve,safety Relief, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-350-3232 has 2 manufacturer part numbers on file: 44303-2120CP (Naval Inventory Control Point Mechanicsburg), 44303-2120 .50IPS 3300PSI SET (Fluid Mechanics Valve Company).
Key specifications for 44303-2120CP: Criticality Code Justification: ZZZY; Style Designator: ANGLE; Operating Pressure: 3800.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Bonnet Type: INSIDE SPRING. 11 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.