The Valve,check, cataloged under National Stock Number 4820-01-583-7322, 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 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-583-7322 |
| Primary Part Number | LF7RU2-2 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| Special Test Features | TEMPERATURE RANGE: 33 DEGREES FAHRENHEIT TO 180 DEGREES FAHRENHEIT |
| Nominal Length | 92.00 MILLIMETERS ALL ENDS MM |
| Supplementary Features | WEIGHT 0.32LBS; SIZE (DN): 20MM; LENGTH: 92MM; BOLT HEIGHT: 48MM LBS |
| Operating Pressure | 175.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Maximum Operating Temp | 180.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| LF7RU2-2 PRIMARY | Watts Regulator Company (USA) |
| LF7RU2-2 3/4 PRIMARY | Watts Regulator Company (USA) |
| Reference | Meaning |
|---|---|
| WAH7C150 | 5/9 Secondary reference Watts Water Technologies Inc |
NSN 4820-01-583-7322 is a Valve,check, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-583-7322 has 2 manufacturer part numbers on file: LF7RU2-2 (Watts Regulator Company), LF7RU2-2 3/4 (Watts Regulator Company).
Key specifications for LF7RU2-2: Special Test Features: TEMPERATURE RANGE: 33 DEGREES FAHRENHEIT TO 180 DEGREES FAHRENHEIT; Nominal Length: 92.00 MILLIMETERS ALL ENDS MM; Supplementary Features: WEIGHT 0.32LBS; SIZE (DN): 20MM; LENGTH: 92MM; BOLT HEIGHT: 48MM LBS; Operating Pressure: 175.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 6 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.