The Valve Assembly, cataloged under National Stock Number 4820-01-533-4415, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Stulz Air Technology Systems, Inc.. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-533-4415 |
| Primary Part Number | SP1530004 |
| Item Name | Valve Assembly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Stulz Air Technology Systems, Inc. |
| Status | ACTIVE |
| 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 |
|---|---|
| SP1530004 | Stulz Air Technology Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 20108-02 | 3/2 Design control — primary reference U.S. Government activity |
| A3274001-213 | 1/2 Source control — Government-approved source U.S. Government activity |
| 20108-02 | 5/9 Secondary reference Drs Environmental Systems, Inc. Dba Drs Technologies |
| 20108-02 | 3/9 Design control — primary reference Drs Environmental Systems Inc |
| A3274001 | D/9 Drawing number reference only U.S. Government activity |
NSN 4820-01-533-4415 is a Valve Assembly, manufactured by Stulz Air Technology Systems, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-533-4415 has 1 manufacturer part number on file: SP1530004 (Stulz Air Technology Systems, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 5915-01-533-6267, 5920-01-533-6720. Verify interchangeability with system specifications before substitution.
Key specifications for SP1530004: End Item Identification: 5895-01-472-7321; OA-9233A/G, OPERATIONS GROUP VAN A. 0 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.