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Technical Data Sheet
PartsTable / COMPONENT / 1-1/2IN4446TBW4 PIECE 4
1-1/2IN4446TBW4 PIECE 4 ✓ Verified by PartsTable
— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The 1-1/2IN4446TBW4 PIECE 4 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-439-2422, 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
1-1/2IN4446TBW4 PIECE 4
NSN: 4820-01-439-2422
FSC: 4820
CAGE: 98991 — WORCESTER CONTROLS CORP P O BOX 2609 COOKEVILLE TN 385022609 (USA)
SPECIFICATIONS
Part Number1-1/2IN4446TBW4 PIECE 4
Capacity4446TB
NSN4820-01-439-2422
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1-1/2IN4446TBW4 PIECE 4 · 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
•
4446TB Capacity
•
STEM ACTUATING END TYPE: ROUNDED
•
VALVE MODEL NUMBER FOR WHICH DESIGNED: 4446TBW4
•
VALVE SIZE FOR WHICH DESIGNED: 1.500 INCHES IN
•
MATERIAL: STEEL COMP 316
•
VALVE TYPE FOR WHICH DESIGNED: BALL
TECHNICAL CHARACTERISTICS (FLIS)
STEM ACTUATING END TYPEROUNDED
VALVE MODEL NUMBER FOR WHICH DESIGNED4446TBW4
VALVE SIZE FOR WHICH DESIGNED1.500 INCHES IN
MATERIALSTEEL COMP 316
END ITEM IDENTIFICATIONSTRATEGIC SEALIFT CONVERSION SHIPS CLASS
VALVE TYPE FOR WHICH DESIGNEDBALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
AA1011Interchangeable
interchangeable cross-reference
interchangeable
9613Interchangeable
interchangeable cross-reference
interchangeable
9307Interchangeable
interchangeable cross-reference
interchangeable
50208Interchangeable
interchangeable cross-reference
interchangeable
PB426Interchangeable
interchangeable cross-reference
interchangeable
J40-260Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1-1/2IN4446TBW4 PIECE 4?
1-1/2IN4446TBW4 PIECE 4 is a 1-1/2IN4446TBW4 PIECE 4.
What parts can replace 1-1/2IN4446TBW4 PIECE 4?
There are 10 known substitutes for 1-1/2IN4446TBW4 PIECE 4: AA1011, 9613, 9307 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1-1/2IN4446TBW4 PIECE 4?
1-1/2IN4446TBW4 PIECE 4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-439-2422. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026