The Valve,safety Relief, cataloged under National Stock Number 4820-00-019-0520, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Norwalk Compreseer Company Inc Dba Norwalk Compressor Company. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-019-0520 |
| Primary Part Number | KV1892441-4TH STAGE SAFETY VALVE |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Norwalk Compreseer Company Inc Dba Norwalk Compressor Company |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Connection Style | PLAIN,OPTIONAL END(PIPE) FIRST END |
| Connection Style | PLAIN (PIPE) SECOND END |
| Style Designator | ANGLE |
| Operating Pressure | 1250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND SECOND END |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.750 INCHES SECOND END IN |
| Nominal Thread Size | 0.500 INCHES FIRST END IN |
| Material | STEEL OVERALL |
| Thread Series Designator | NPT SECOND END |
| Thread Series Designator | NPT FIRST END |
| 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 |
|---|---|
| KV1892441-4TH STAGE SAFETY VALVE PRIMARY | Norwalk Compreseer Company Inc Dba Norwalk Compressor Company (USA) |
| Reference | Meaning |
|---|---|
| C0207-4 | 5/9 Secondary reference Norwalk Compreseer Company Inc Dba Norwalk Compressor Company |
| C02074 | 5/9 Secondary reference Norwalk Compreseer Company Inc Dba Norwalk Compressor Company |
NSN 4820-00-019-0520 is a Valve,safety Relief, manufactured by Norwalk Compreseer Company Inc Dba Norwalk Compressor Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-019-0520 has 1 manufacturer part number on file: KV1892441-4TH STAGE SAFETY VALVE (Norwalk Compreseer Company Inc Dba Norwalk Compressor Company).
Key specifications for KV1892441-4TH STAGE SAFETY VALVE: Flow Control Device: POPPET; Connection Style: PLAIN,OPTIONAL END(PIPE) FIRST END; Connection Style: PLAIN (PIPE) SECOND END; Style Designator: ANGLE. 13 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.