NSN 4820-01-728-2437 · NIIN 017282437 · Part number 4ALF 3A33A
Aalberts Integrated Piping Systems Americas, Inc. · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 72219
Government record, cited
NSN 4820-01-728-2437 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-728-2437. Manufacturer of record part number: 4ALF 3A33A.
Maximum Operating Temp and Media for Which Designed: 180.0 FAHRENHEIT WATER DEGF
Operating Pressure and Type: 175.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LBS
1 manufacturer part number on file
Manufacturer of record: Aalberts Integrated Piping Systems Americas, Inc.
Identification
NSN: 4820-01-728-2437
NIIN: 017282437
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 4ALF 3A33A
Manufacturer: Aalberts Integrated Piping Systems Americas, Inc.
General Description
The Valve Assembly, cataloged under National Stock Number 4820-01-728-2437, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Aalberts Integrated Piping Systems Americas, Inc.. Government technical data includes 2 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.
Technical Specifications
Parameter
Value
NSN
4820-01-728-2437
Primary Part Number
4ALF 3A33A
Item Name
Valve Assembly
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Aalberts Integrated Piping Systems Americas, Inc.
Status
ACTIVE
Maximum Operating Temp and Media for Which Designed
180.0 FAHRENHEIT WATER DEGF
Operating Pressure and Type
175.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LBS
Aalberts Integrated Piping Systems Americas, Inc. (USA)
No interchangeability data on file.
Other items in FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-728-2437?
NSN 4820-01-728-2437 is a Valve Assembly, manufactured by Aalberts Integrated Piping Systems Americas, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-728-2437?
NSN 4820-01-728-2437 has 1 manufacturer part number on file: 4ALF 3A33A (Aalberts Integrated Piping Systems Americas, Inc.).
What are the specifications of 4ALF 3A33A?
Key specifications for 4ALF 3A33A: Maximum Operating Temp and Media for Which Designed: 180.0 FAHRENHEIT WATER DEGF; Operating Pressure and Type: 175.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LBS; Special Features: LEAD FREE, INLET AND OUTLET SIZE 1/2 INCHES, CONNECTIONS FNPT IN; Part Name Assigned by Controlling Agency: DUAL CHECK VALVE. 2 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-728-2437 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.