The Valve,check, cataloged under National Stock Number 4820-01-073-0228, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Manufacturers Standardization Society of the Valve and Fittings Industry Inc. Government technical data includes 17 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-073-0228 |
| Primary Part Number | MSS SP-80 TYPE 4,CL 125,1-1/2 IN |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Manufacturers Standardization Society of the Valve and Fittings Industry Inc |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | PLAIN (TUBE) ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | UNTHREADED INTERNAL TUBE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | ASTM B-62 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTM B-62 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Nominal Outside Diameter Tube Accommodated | 1.500 INCHES ALL ENDS IN |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Operating Pressure | 125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Nondefinitive Spec/std Data | 4 TYPE AND A CLASS AND 1 1/2 IN SIZE IN |
| Disk Loading Method | WEIGHT |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSE |
| Media for Which Designed | STEAM FIRST RESPONSE |
| Material | COPPER ALLOY 836 BODY |
| Material | COPPER ALLOY 836 FLOW CONTROL DEVICE |
| 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 |
|---|---|
| MSS SP-80 TYPE 4,CL 125,1-1/2 IN PRIMARY | Manufacturers Standardization Society of the Valve and Fittings Industry Inc (USA) |
| Reference | Meaning |
|---|---|
| WW-V-51 | 5/9 Secondary reference U.S. Government activity |
| S-413-B 1 1/2IN | 3/9 Design control — primary reference Nibco Inc |
| WW-V-51 TY4CLASZ1 1/2 IN | 5/9 Secondary reference U.S. Government activity |
| MSS SP-80 | 3/1 Design control — primary reference Manufacturers Standardization Society of the Valve and Fittings Industry Inc |
NSN 4820-01-073-0228 is a Valve,check, manufactured by Manufacturers Standardization Society of the Valve and Fittings Industry Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-073-0228 has 1 manufacturer part number on file: MSS SP-80 TYPE 4,CL 125,1-1/2 IN (Manufacturers Standardization Society of the Valve and Fittings Industry Inc).
Key specifications for MSS SP-80 TYPE 4,CL 125,1-1/2 IN: Flow Control Device: DISK; Connection Style: PLAIN (TUBE) ALL ENDS; Mounting Position: HORIZONTAL OR VERTICAL; Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS. 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.