The Valve,safety Relief, cataloged under National Stock Number 4820-01-564-1901, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Dante Valve Company. Government technical data includes 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-564-1901 |
| Primary Part Number | BASGG03SKM |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Dante Valve Company |
| Status | ACTIVE |
| Disk Loading Method | SPRING |
| Material | BRONZE BODY |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| BASGG03SKM PRIMARY | Dante Valve Company (USA) |
| CD D3040FF LHD REV A | Dante Valve Company (USA) |
| Reference | Meaning |
|---|---|
| CD C3040FF LHD | D/9 Drawing number reference only Danco Valve Company |
| CD D3040FF LHD REV A | 5/9 Secondary reference Danco Valve Company |
| BASGG03SKM | 3/9 Design control — primary reference Danco Valve Company |
NSN 4820-01-564-1901 is a Valve,safety Relief, manufactured by Dante Valve Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-564-1901 has 2 manufacturer part numbers on file: BASGG03SKM (Dante Valve Company), CD D3040FF LHD REV A (Dante Valve Company).
Key specifications for BASGG03SKM: Disk Loading Method: SPRING; Special Features: 150 FLANGE RATING, SET PRESSURE: 21 PSIG, MAX. ACCUMULATION: 26.5 PSIG, MIN. BLOWDOWN: 16 PSIG, RATED CAPACITY: GPM, REQUIRED CAPACITY: 200 GPM; SPRING RANGE: 13/23 PSIG, INLET LOSS: 1.25 PSIG, BACKPRESSURE MAX: 2.1 PSIG; Part Name Assigned by Controlling Agency: 3 X 4 INCH ANGLE RELIEF VALVE IN; End Item Identification: SEAWOLF CLASS SSN. 3 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.
NSN 4820-01-564-1901 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.