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Technical Data Sheet
PartsTable / COMPONENT / 428B-9
428B-9 ✓ 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 TAILPIECE,VALVE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, special_features: VENTED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-075-7389, 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
428B-9
NSN: 4820-01-075-7389
FSC: 4820
CAGE: 71718 — COYNE & DELANY COMPANY DBA DELANY PRODUCTS DIV DELANY PRODUCTS (USA)
SPECIFICATIONS
materialCOPPER ALLOY
special_featuresVENTED
NSN4820-01-075-7389
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 428B-9 · 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
•
MATERIAL: COPPER ALLOY
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESVENTED
MATERIALCOPPER ALLOY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
9954Interchangeable
interchangeable cross-reference
interchangeable
3248Interchangeable
interchangeable cross-reference
interchangeable
22578Interchangeable
interchangeable cross-reference
interchangeable
712731-3Interchangeable
interchangeable cross-reference
interchangeable
K1011-3Interchangeable
interchangeable cross-reference
interchangeable
712731-003Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 428B-9?
428B-9 is a TAILPIECE,VALVE.
What parts can replace 428B-9?
There are 10 known substitutes for 428B-9: 9954, 3248, 22578 and 7 more. Substitute compatibility should be verified for your specific system.
Is 428B-9 still available?
428B-9 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026