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A21494 ✓ 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 SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, seat_angle_in_deg: 90.000 NOMINAL, seating_surface_shape: ANGULAR. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-063-8820, 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
A21494
NSN: 4820-00-063-8820
FSC: 4820
CAGE: 89326 — BARKSDALE, INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
seat_angle_in_deg90.000 NOMINAL
seating_surface_shapeANGULAR
NSN4820-00-063-8820
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: A21494 · 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
•
SEAT ANGLE IN DEG: 90.000 NOMINAL
•
SEATING SURFACE SHAPE: ANGULAR
•
MATERIAL: COPPER ALLOY OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
SEAT ANGLE IN DEG90.000 NOMINAL
SEATING SURFACE SHAPEANGULAR
MATERIALCOPPER ALLOY OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
21494Interchangeable
interchangeable cross-reference
interchangeable
26940-001Interchangeable
interchangeable cross-reference
interchangeable
644Interchangeable
interchangeable cross-reference
interchangeable
02057032Interchangeable
interchangeable cross-reference
interchangeable
76322Interchangeable
interchangeable cross-reference
interchangeable
444620Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A21494?
A21494 is a SEAT,VALVE.
What parts can replace A21494?
There are 10 known substitutes for A21494: 21494, 26940-001, 644 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A21494?
A21494 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-063-8820. 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