The Valve,diaphragm,stop, cataloged under National Stock Number 4820-01-458-5983, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-458-5983 |
| Primary Part Number | W112084A |
| Item Name | Valve,diaphragm,stop |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| 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 |
|---|---|
| W112084A PRIMARY | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| W112084A REV B | D/9 Drawing number reference only Siemens Energy, Inc. Dba Dresser-Rand |
| W112084A | 5/9 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| W112084A | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
NSN 4820-01-458-5983 is a Valve,diaphragm,stop, manufactured by Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-458-5983 has 1 manufacturer part number on file: W112084A (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-458-5985, 4820-01-458-5987. Verify interchangeability with system specifications before substitution.
Key specifications for W112084A: Special Features: INCLUDES 1 NAMEPLATE;1 CAP ADJ. SCREW;1 LIMIT STOP;1 LOCKNUT;1 GASKET;1 DIAPHRAGM CHAMBER;10 NUTS;1 PRESS PLATE;1 DIAPHRAGM;1 GUIDE;1 DIAPHRAGM BASE;10 SCREW;8 SCREW;2 O-RING;2 O-RING;2 GUIDE BUSHING;1 PUSHER POST;1 SEAT RING;1 SEAT DISC;1 PISTON;1 SCREW;1 BODY;1 PISTON RING;1 BOTTOM PLUG AND 1 BOTTOM GASKET; P/N'S IN ORDER AS WRITTEN OF 2112084AT1 THRU W112084AT25; Part Name Assigned by Controlling Agency: SEA WATER SHUTOF VALVE 1 1/2 INCH IN; End Item Identification: VALVE,CAGE 03950. 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.