The Valve,check, cataloged under National Stock Number 4820-01-425-5311, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hydac Corp. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-425-5311 |
| Primary Part Number | RV30-1.1/12 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hydac Corp |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Connection Style | GASKET SEAL (BOSS) ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Minimum Operating Temp | -4.0 FAHRENHEIT DEGF |
| Connection Type | THREADED INTERNAL BOSS ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 1.875 INCHES ALL ENDS IN |
| Maximum Operating Temp | 212.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | HYDRAULIC FLUID, PHOSPHATE-ESTER BASE SECOND RESPONSE |
| Media for Which Designed | HYDRAULIC FLUID, MINERAL BASE FIRST RESPONSE |
| Thread Class | 2B ALL ENDS |
| Thread Quantity Per Inch | 12 ALL ENDS |
| Material | STEEL BODY |
| Thread Series Designator | UN ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| RV30-1.1/12 PRIMARY | Hydac Corp (USA) |
| D-452-098 IT H | Pacific Powertech Llc (USA) |
| Reference | Meaning |
|---|---|
| D-452-098 | D/9 Drawing number reference only Pacific Powertech Llc |
NSN 4820-01-425-5311 is a Valve,check, manufactured by Hydac Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-425-5311 has 2 manufacturer part numbers on file: RV30-1.1/12 (Hydac Corp), D-452-098 IT H (Pacific Powertech Llc).
Key specifications for RV30-1.1/12: Flow Control Device: POPPET; Connection Style: GASKET SEAL (BOSS) ALL ENDS; Mounting Position: HORIZONTAL OR VERTICAL; Minimum Operating Temp: -4.0 FAHRENHEIT DEGF. 17 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.