The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-024-9870, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. Government technical data includes 24 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-024-9870 |
| Primary Part Number | 1-2IN U135LP |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| Flow Control Device | DIAPHRAGM |
| Renewable Seat Ring Type | THREADED |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | NOT IDENTICAL |
| Body Style | STRAIGHT THRU |
| Regulation Type | 1ST STAGE AUTOMATIC, 2ND STAGE MANUAL |
| First End Style Designator | INVERTED FLARE |
| Temp Rating | 160.0 FAHRENHEIT MAXIMUM DEGF |
| End Connection Quantity | 2 |
| Outlet Pressure Range | 10.0 TO 35.0 CAMERA MOUNT |
| Second End Thread Direction | RIGHT-HAND |
| Manual Control Method | SCREW |
| Valve Loading Method | SPRING |
| Second End Style Designator | INVERTED FLARE |
| First End Connection Type | THREADED INTERNAL TUBE |
| First End Outside Diameter Tube Accommodated | 0.500 INCHES NOMINAL IN |
| Material | COPPER ALLOY FLOW CONTROL DEVICE |
| Material | STEEL CORROSION RESISTING SEAT |
| Media for Which Designed | WATER |
| Maximum Inlet Pressure Rating | ERR-060 |
| Second End Connection Type | THREADED EXTERNAL TUBE |
| Furnished Items | TAILPIECE AND UNION NUT |
| Filter | INCLUDED |
| Second End Outside Diameter Tube Accommodated | 0.500 INCHES NOMINAL IN |
| 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 |
|---|---|
| 1-2IN U135LP PRIMARY | Watts Regulator Company (USA) |
NSN 4820-01-024-9870 is a Valve,regulating,fluid Pressure, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-024-9870 has 1 manufacturer part number on file: 1-2IN U135LP (Watts Regulator Company).
Key specifications for 1-2IN U135LP: Flow Control Device: DIAPHRAGM; Renewable Seat Ring Type: THREADED; First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: NOT IDENTICAL. 24 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.