The Piston,valve, cataloged under National Stock Number 4820-01-426-7783, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Circor Pumps North America Llc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4820-01-426-7783 |
| Primary Part Number | 077222 |
| Item Name | Piston,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Circor Pumps North America Llc |
| 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 |
|---|---|
| 077222 | Circor Pumps North America Llc (USA) |
| Reference | Meaning |
|---|---|
| ACE 038N1 D614 | 5/9 Secondary reference Imo Ab |
| 077222 | 3/9 Design control — primary reference Imo Ab |
NSN 4820-01-426-7783 is a Piston,valve, manufactured by Circor Pumps North America Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-426-7783 has 1 manufacturer part number on file: 077222 (Circor Pumps North America Llc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-439-5311. Verify interchangeability with system specifications before substitution.
Key specifications for 077222: Special Features: FOR PRESSURE REGULATING VALVE; End Item Identification: IMO INDUSTRIES INC LOW PRESSURE PUMP SERIES ACG/UCGN5 SIZE 045-070; STATEGIC SEALIFT CONVERSION SHIPS CLASS. 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.