The Piston,trip Valve, cataloged under National Stock Number 4810-01-182-3534, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Siemens Energy, Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Piston,trip Valve |
| FSC / FSG | 4810 — Valves, Powered (FSG 48) |
| Manufacturers | Siemens Energy, Inc. (CAGE 16712) |
| Parameter | Value |
|---|---|
| NSN | 4810-01-182-3534 |
| Primary Part Number | M1802HM |
| Item Name | Piston,trip Valve |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Siemens Energy, 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 |
|---|---|
| M1802HM PRIMARY | Siemens Energy, Inc. (USA) |
| D-56476 PIECE 22 | Siemens Energy, Inc. (USA) |
| Reference | Meaning |
|---|---|
| D-56476 | D/9 Drawing number reference only Siemens Energy, Inc. |
NSN 4810-01-182-3534 is a Piston,trip Valve, manufactured by Siemens Energy, Inc., classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-01-182-3534 has 2 manufacturer part numbers on file: M1802HM (Siemens Energy, Inc.), D-56476 PIECE 22 (Siemens Energy, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4810-01-182-4503. Verify interchangeability with system specifications before substitution.
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.