The Valve,flow Control, cataloged under National Stock Number 4820-01-441-7803, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-441-7803 |
| Primary Part Number | Y109101002 |
| Item Name | Valve,flow Control |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Leslie Controls, Inc. Dba Leslie Controls Inc |
| Status | ACTIVE |
| Flange Face Design | RAISED |
| Body Material Document and Classification | ASTM A216, GRADE WCB ASSN STD SINGLE MATERIAL RESPONSE |
| Connection Type | FLANGE, ROUND W/HOLES |
| End Connection Quantity | 2 |
| Valve Size | 3.000 INCHES IN |
| Body Material | STEEL UNS J03002 |
| Bolt Hole Quantity | 4 |
| Flange Diameter | 7.500 INCHES IN |
| Seat Material Document and Classification | AISI 440C ASSN STD SINGLE MATERIAL RESPONSE |
| Face to Face Distance | 11.750 INCHES IN |
| Seat Material | STEEL COMP 440C |
| Pressure Class | ERR-060 |
| 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 |
|---|---|
| Y109101002 PRIMARY | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| S520156301 | D/9 Drawing number reference only Leslie Controls, Inc. Dba Leslie Controls Inc |
| S520156301 CDS-33137N | 5/9 Secondary reference Leslie Controls, Inc. Dba Leslie Controls Inc |
NSN 4820-01-441-7803 is a Valve,flow Control, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-441-7803 has 1 manufacturer part number on file: Y109101002 (Leslie Controls, Inc. Dba Leslie Controls Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-441-7805, 4820-01-441-7806. Verify interchangeability with system specifications before substitution.
Key specifications for Y109101002: Flange Face Design: RAISED; Body Material Document and Classification: ASTM A216, GRADE WCB ASSN STD SINGLE MATERIAL RESPONSE; Connection Type: FLANGE, ROUND W/HOLES; End Connection Quantity: 2. 12 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.