The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-181-3609, 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 18 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-181-3609 |
| Primary Part Number | YB2311B225 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Leslie Controls, Inc. Dba Leslie Controls Inc |
| Status | ACTIVE |
| Flow Control Device | DIAPHRAGM |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| Regulation Type | AUTOMATIC SINGLE STAGE |
| First End Style Designator | SOCKET W/BRAZING RING |
| End Connection Quantity | 2 |
| Outlet Pressure Range | 60.0 TO 100.0 CAMERA MOUNT |
| Valve Loading Method | SPRING |
| First End Connection Type | UNTHREADED INTERNAL TUBE |
| First End Outside Diameter Tube Accommodated | 0.375 INCHES NOMINAL IN |
| Material | NICKEL ALLOY STEM |
| Material | NICKEL ALLOY AND COPPER ALLOY SEAT |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE |
| Media for Which Designed | WATER |
| Maximum Inlet Pressure Rating | ERR-060 |
| Furnished Items | TAILPIECE AND UNION NUT |
| Filter | NOT INCLUDED |
| 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 |
|---|---|
| YB2311B225 PRIMARY | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| 30-3/8-60T100PSI | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| N-523 | D/9 Drawing number reference only Leslie Controls, Inc. Dba Leslie Controls Inc |
NSN 4820-01-181-3609 is a Valve,regulating,fluid Pressure, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-181-3609 has 2 manufacturer part numbers on file: YB2311B225 (Leslie Controls, Inc. Dba Leslie Controls Inc), 30-3/8-60T100PSI (Leslie Controls, Inc. Dba Leslie Controls Inc).
5 possible matches (shared part number, not a government interchangeability claim): 4730-01-393-1027, 4820-01-465-5175, 4820-01-503-8691. Verify interchangeability with system specifications before substitution.
Key specifications for YB2311B225: Flow Control Device: DIAPHRAGM; Second End Relationship with First End: IDENTICAL; Body Style: STRAIGHT THRU; Regulation Type: AUTOMATIC SINGLE STAGE. 18 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.