The Valve,y, cataloged under National Stock Number 4820-00-446-3534, 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 20 specifications, cited from the U.S. Government catalog. The record lists 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-446-3534 |
| Primary Part Number | 3-1856BPC65 |
| Item Name | Valve,y |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Aqua-Chem, Inc. Dba Aqua-Chem Inc |
| Status | ACTIVE |
| Flow Control Device | DISKDISK |
| Renewable Seat Ring Type | THREADEDTHREADED |
| Connection Style | PLAIN,OPTIONAL END(PIPE) ALL ENDSPLAIN,OPTIONAL END(PIPE) ALL ENDS |
| Connection Type | THREADED INTERNAL PIPE ALL ENDSTHREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU Y-PATTERN |
| Operating Pressure | 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Features Provided | BONNET PACKINGBONNET PACKING |
| Bonnet Type | INSIDE SCREWINSIDE SCREW |
| Thread Direction | RIGHT-HAND ALL ENDSRIGHT-HAND ALL ENDS |
| Nominal Thread Size | 1.500 INCHES ALL ENDS1.500 INCHES ALL ENDS IN |
| Maximum Operating Temp | 500.0 FAHRENHEIT SINGLE RESPONSE500.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Bonnet Attachment Method | UNIONUNION |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSE |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSESTEAM FIRST RESPONSE |
| Material | COPPER ALLOY STEM |
| Material | NICKEL ALLOY FLOW CONTROL DEVICENICKEL ALLOY SEAT |
| Material | COPPER ALLOY STEMNICKEL ALLOY FLOW CONTROL DEVICE |
| Material | NICKEL ALLOY SEATCOPPER ALLOY BODY |
| Thread Series Designator | NPT ALL ENDS |
| Valve Operation Method | MANUALMANUAL |
| 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 |
|---|---|
| 3-1856BPC65 PRIMARY | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 941-222 PRIMARY | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1856APC65 PRIMARY | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1696APC48 PRIMARY | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1569BPC80 PRIMARY | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1696BPC48 PRIMARY | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 904161 PRIMARY | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 3-1569APC80 PRIMARY | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| E3-2152APC65 PRIMARY | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| E3-2152BPC65 PRIMARY | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| Reference | Meaning |
|---|---|
| 3-1696BPC48 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-1856BPC65 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 904161 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-1569APC80 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| E3-2152BPC65 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-1569BPC80 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-1696APC48 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| E3-2152APC65 | 3/9 Design control — primary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 3-1856APC65 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
| 941-222 | 5/9 Secondary reference Aqua-Chem Inc Cleaver-Brooks Div |
NSN 4820-00-446-3534 is a Valve,y, manufactured by Aqua-Chem, Inc. Dba Aqua-Chem Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-446-3534 has 10 manufacturer part numbers on file: 3-1856BPC65 (Aqua-Chem, Inc. Dba Aqua-Chem Inc), 941-222 (Aqua-Chem, Inc. Dba Aqua-Chem Inc), 3-1856APC65 (Aqua-Chem, Inc. Dba Aqua-Chem Inc), 3-1696APC48 (Aqua-Chem, Inc. Dba Aqua-Chem Inc), 3-1569BPC80 (Aqua-Chem, Inc. Dba Aqua-Chem Inc) and 5 more.
2 possible matches (shared part number, not a government interchangeability claim): 5961-01-230-5918, 5120-01-577-9736. Verify interchangeability with system specifications before substitution.
Key specifications for 3-1856BPC65: Flow Control Device: DISKDISK; Renewable Seat Ring Type: THREADEDTHREADED; Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDSPLAIN,OPTIONAL END(PIPE) ALL ENDS; Connection Type: THREADED INTERNAL PIPE ALL ENDSTHREADED INTERNAL PIPE ALL ENDS. 20 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.