The Stack Valve Assembly, cataloged under National Stock Number 1720-01-156-9285, is classified within Federal Supply Class 1720 (Aircraft Launching Equipment) of the Aircraft Launch, Landing, and Ground Handling Equipment group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division. The record lists 5 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 1720-01-156-9285 |
| Primary Part Number | 619447-2 |
| Item Name | Stack Valve Assembly |
| FSC / FSG | 1720 / 17 — Aircraft Launching Equipment |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| EPA21A00-170 | Naval Group Site De Brest (FRA) |
| 619447-2 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division (USA) |
| 619447-2 | Bosch Rexroth Corporation Div Industrial Hydraulics (USA) |
| 25304-9109-2852 | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division (USA) |
| 619447-2 / 25304-9109-2852 PRIMARY | Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris (USA) |
| Reference | Meaning |
|---|---|
| 619447-2 | 3/2 Design control — primary reference U.S. Government activity |
| 619447-2 | 5/9 Secondary reference Dynex/rivett Inc. |
| 25304-9109-2852 | 5/9 Secondary reference U.S. Government activity |
NSN 1720-01-156-9285 is a Stack Valve Assembly, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division, classified under FSC 1720, Aircraft Launching Equipment. Status: active.
NSN 1720-01-156-9285 has 5 manufacturer part numbers on file: EPA21A00-170 (Naval Group Site De Brest), 619447-2 (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division), 619447-2 (Bosch Rexroth Corporation Div Industrial Hydraulics), 25304-9109-2852 (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division), 619447-2 / 25304-9109-2852 (Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris).
Key specifications for 619447-2: End Item Identification: JET BLAST DEFLECTOR. 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.
NSN 1720-01-156-9285 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.