The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-640-5994, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-640-5994 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | STEM AND INTEGRAL DISKSTEM AND INTEGRAL DISK |
| Valve Stem Design | DOUBLE SEATDOUBLE SEAT |
| First End Thread Direction | RIGHT-HANDRIGHT-HAND |
| Second End Relationship with First End | IDENTICALIDENTICAL |
| Remote Actuation Method | PISTONPISTON |
| Body Style | STRAIGHT THRUSTRAIGHT THRU |
| First End Style Designator | PLAINPLAIN |
| Temp Rating | 175.0 FAHRENHEIT NOMINAL175.0 FAHRENHEIT NOMINAL DEGF |
| End Connection Quantity | 22 |
| First End Connection Type | THREADED INTERNAL PIPETHREADED INTERNAL PIPE |
| Material | BRONZE SEATBRONZE SEAT |
| Material | COPPER ALLOY AND COPPER ALLOY AND COPPER ALLOY FLOW CONTROL DEVICECOPPER ALLOY FLOW CONTROL DEVICE |
| Material | COPPER ALLOY STEMCOPPER ALLOY STEM |
| Media for Which Designed | AIRAIR |
| Maximum Inlet Pressure Rating | ERR-060 |
| Thread Size and Series/type Designator | 1/2-14 NPT FIRST END1/2-14 NPT FIRST END |
| Outlet Pressure Setting | 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 |
| Reference | Meaning |
|---|---|
| 743MVM1 | 3/9 Design control — primary reference Ross Operating Valve Co |
NSN 4820-00-640-5994 is a Valve,regulating,fluid Pressure, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-640-5994: Flow Control Device: STEM AND INTEGRAL DISKSTEM AND INTEGRAL DISK; Valve Stem Design: DOUBLE SEATDOUBLE SEAT; First End Thread Direction: RIGHT-HANDRIGHT-HAND; Second End Relationship with First End: IDENTICALIDENTICAL. 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.