The Valve,check, cataloged under National Stock Number 4820-00-446-3507, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Aqua-Chem, Inc. Dba Aqua-Chem Inc. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 18 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 19 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-446-3507 |
| Primary Part Number | 3-1696BPC49 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Aqua-Chem, Inc. Dba Aqua-Chem Inc |
| Status | ACTIVE |
| Flow Control Device | BALL |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Mounting Position | HORIZONTAL |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | ANGLE |
| Material Document and Classification | ASTM B61 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTM B61 ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Operating Pressure | 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.125 INCHES FIRST END IN |
| Maximum Operating Temp | 550.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSE |
| Media for Which Designed | STEAM FIRST RESPONSE |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | COPPER ALLOY 922 BODY |
| Material | COPPER ALLOY 922 SEAT |
| Thread Series Designator | NPT ALL ENDS |
| 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 |
|---|---|
| 3-1696BPC49 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1569BPC46 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1409CPC46 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-858KPC22 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1569GPC24 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1696APC49 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1601BPC49 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 904163 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1425HPC30 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1696DPC30 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1601APC49 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-858PC49 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-858HPC49 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1409LPC24 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1569APC46 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1409DPC46 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1425BPC49 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1425APC49 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| Reference | Meaning |
|---|---|
| 3-1409DPC46 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 416-1-8IN | 3/9 Design control — primary reference Lunkenheimer Co |
| 3-1569BPC46 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-1569GPC24 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-1569APC46 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 904163 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-1425BPC49 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-1696APC49 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-1409CPC46 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-1425APC49 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-1696BPC49 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-858HPC49 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-858KPC22 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-858PC49 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-1409LPC24 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-1425HPC30 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-1601APC49 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-1601BPC49 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-1696DPC30 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
NSN 4820-00-446-3507 is a Valve,check, manufactured by Aqua-Chem, Inc. Dba Aqua-Chem Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-446-3507 has 18 manufacturer part numbers on file: 3-1696BPC49 (Aqua-Chem, Inc. Dba Aqua-Chem Inc), 3-1569BPC46 (Aqua-Chem, Inc. Dba Aqua-Chem Inc), 3-1409CPC46 (Aqua-Chem, Inc. Dba Aqua-Chem Inc), 3-858KPC22 (Aqua-Chem, Inc. Dba Aqua-Chem Inc), 3-1569GPC24 (Aqua-Chem, Inc. Dba Aqua-Chem Inc) and 13 more.
Key specifications for 3-1696BPC49: Flow Control Device: BALL; Connection Style: PLAIN, OPTIONAL END (PIPE) ALL ENDS; Mounting Position: HORIZONTAL; Connection Type: THREADED INTERNAL PIPE ALL ENDS. 19 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.