The Valve,check, cataloged under National Stock Number 4820-01-541-5446, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Evac North America Inc. Government technical data includes 11 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-541-5446 |
| Primary Part Number | 5500447 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Evac North America Inc |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Renewable Seat Ring Type | PRESSED-IN |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | ASTM A216 WCB ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTM A351-CF8M ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | VITON MFR REF SINGLE MATERIAL RESPONSE SEAT |
| Disk Loading Method | SPRING |
| Material | STEEL BODY |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | RUBBER POLYMETHYLENE-PERFLUOROALKYLENE CLASS FKM SEAT |
| 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 |
|---|---|
| 5500447 PRIMARY | Evac North America Inc (USA) |
| Reference | Meaning |
|---|---|
| 1200-CS 4.0IN | 5/9 Secondary reference Envirovac Inc Dba Monogram Systems-Rockford Div |
| 1200-CS 4.0IN | 5/9 Secondary reference Cooper Cameron Corp Cooper Cameron Valves Div |
| 4SD15CCVSR | 5/9 Secondary reference Champion Valves Inc. |
NSN 4820-01-541-5446 is a Valve,check, manufactured by Evac North America Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-541-5446 has 1 manufacturer part number on file: 5500447 (Evac North America Inc).
Key specifications for 5500447: Flow Control Device: DISK; Renewable Seat Ring Type: PRESSED-IN; Style Designator: STRAIGHT THRU; Material Document and Classification: ASTM A216 WCB ASSN STD SINGLE MATERIAL RESPONSE BODY. 11 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.