The Valve Assembly, cataloged under National Stock Number 4820-00-340-0880, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Compressor Engineering Corp. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Valve Assembly |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Compressor Engineering Corp (CAGE 58430); Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (CAGE 8FGX3) |
| Parameter | Value |
|---|---|
| NSN | 4820-00-340-0880 |
| Primary Part Number | CE-MLH34646G1 |
| Item Name | Valve Assembly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Compressor Engineering Corp |
| 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 |
|---|---|
| CE-MLH34646G1 PRIMARY | Compressor Engineering Corp (USA) |
| MLH34646G1 | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| MLH34646G1 | Compressor Engineering Corp (USA) |
| Reference | Meaning |
|---|---|
| MLH34646G1 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 4820PL1245007 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 5212221 | 5/9 Secondary reference Navy, United States Department of the Dba Naval Surface Warfare Center Div Naval Surface Warfare Center Crane Division |
| MLH34646G2 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| MLH34646G1 | 5/9 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| MLH34646G1 | 5/9 Secondary reference U.S. Government activity |
| 37491883 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4820-00-340-0880 is a Valve Assembly, manufactured by Compressor Engineering Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-340-0880 has 3 manufacturer part numbers on file: CE-MLH34646G1 (Compressor Engineering Corp), MLH34646G1 (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions), MLH34646G1 (Compressor Engineering Corp).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-418-8674. 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.