The Valve,safety Relief, cataloged under National Stock Number 4820-01-729-4687, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ryan Herco Flow Solutions Inc Dba Mensco Div. Government technical data includes 13 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 | 4820-01-729-4687 |
| Primary Part Number | ECO-50A-PVC-E |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ryan Herco Flow Solutions Inc Dba Mensco Div |
| Status | ACTIVE |
| Flow Control Device | DIAPHRAGM |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH GAUGE (PSIG) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 0.500 INCHES IN |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Maximum Operating Temp | 150.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Face to Face Distance | 3.350 INCHES IN |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSE |
| Material | PLASTIC POLYVINYL CHLORIDE (PVC) BODY |
| Thread Series Designator | NPT ALL ENDS |
| Valve Operation Method | HYDRAULIC |
| 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 |
|---|---|
| ECO-50A-PVC-E PRIMARY | Ryan Herco Flow Solutions Inc Dba Mensco Div (USA) |
NSN 4820-01-729-4687 is a Valve,safety Relief, manufactured by Ryan Herco Flow Solutions Inc Dba Mensco Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-729-4687 has 1 manufacturer part number on file: ECO-50A-PVC-E (Ryan Herco Flow Solutions Inc Dba Mensco Div).
Key specifications for ECO-50A-PVC-E: Flow Control Device: DIAPHRAGM; Connection Type: THREADED INTERNAL PIPE ALL ENDS; Style Designator: STRAIGHT THRU; Operating Pressure: 150.0 POUNDS PER SQUARE INCH GAUGE (PSIG) MAXIMUM SINGLE RESPONSE LBS. 13 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.