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4ALF 3A33A — VALVE ASSEMBLY

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

4ALF 3A33A: VALVE ASSEMBLY.

The VALVE ASSEMBLY is a the manufacturer industrial component. Key specifications include special_features: LEAD FREE, INLET AND OUTLET SIZE 1/2 INCHES, CONNECTIONS FNPT IN, operating_pressure_and_type: 175.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LBS, part_name_assigned_by_controlling_agency: DUAL CHECK VALVE, maximum_operating_temp_and_media_for_which_designed: 180.0 FAHRENHEIT WATER DEGF. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-728-2437, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
4ALF 3A33A
NSN: 4820-01-728-2437
FSC: 4820 — Valves, Nonpowered
CAGE: 72219 — AALBERTS INTEGRATED PIPING SYSTEMS AMERICAS, INC. (USA)
SPECIFICATIONS
special_featuresLEAD FREE, INLET AND OUTLET SIZE 1/2 INCHES, CONNECTIONS FNPT IN
operating_pressure_and_type175.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LBS
part_name_assigned_by_controlling_agencyDUAL CHECK VALVE
maximum_operating_temp_and_media_for_which_designed180.0 FAHRENHEIT WATER DEGF
NSN4820-01-728-2437
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 4ALF 3A33A · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
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
TECHNICAL CHARACTERISTICS
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED180.0 FAHRENHEIT WATER DEGF
OPERATING PRESSURE AND TYPE175.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LBS
SPECIAL FEATURESLEAD FREE, INLET AND OUTLET SIZE 1/2 INCHES, CONNECTIONS FNPT IN
PART NAME ASSIGNED BY CONTROLLING AGENCYDUAL CHECK VALVE
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 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4ALF 3A33A?
4ALF 3A33A is a VALVE ASSEMBLY.
What is the NSN for 4ALF 3A33A?
4ALF 3A33A is cataloged in the U.S. Government catalog under NSN 4820-01-728-2437. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.