The Valve,check, cataloged under National Stock Number 4820-01-656-2469, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Core Industries Inc. Dba Mueller Steam Specialty. Government technical data includes 15 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 | 4820-01-656-2469 |
| Primary Part Number | 2.5-72-BQB3Q-0 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Core Industries Inc. Dba Mueller Steam Specialty |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | ASTM B62 (85-5-5-5) ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTM B62 (85-5-5-5) ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Operating Pressure | 150.00 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Operating Pressure | 225.00 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Valve Size | 2.500 INCHES IN |
| Maximum Operating Temp | 150.00 FAHRENHEIT FIRST RESPONSE DEGF |
| Maximum Operating Temp | 406.00 FAHRENHEIT SECOND RESPONSE DEGF |
| Nominal Outside Diameter | 4.875 INCHES ALL ENDS IN |
| Face to Face Distance | 2.625 INCHES IN |
| Material | COPPER ALLOY BODY |
| Material | COPPER ALLOY FLOW CONTROL DEVICE |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR 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 |
|---|---|
| 2.5-72-BQB3Q-0 PRIMARY | Core Industries Inc. Dba Mueller Steam Specialty (USA) |
NSN 4820-01-656-2469 is a Valve,check, manufactured by Core Industries Inc. Dba Mueller Steam Specialty, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-656-2469 has 1 manufacturer part number on file: 2.5-72-BQB3Q-0 (Core Industries Inc. Dba Mueller Steam Specialty).
Key specifications for 2.5-72-BQB3Q-0: Flow Control Device: DISK; Style Designator: STRAIGHT THRU; Material Document and Classification: ASTM B62 (85-5-5-5) ASSN STD SINGLE MATERIAL RESPONSE BODY; Material Document and Classification: ASTM B62 (85-5-5-5) ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE. 15 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.