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Av-Tek - DEX Double Eccentric Butterfly Valves

Av-Tek – Dex Double Eccentric Butterfly Valve

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The Av-Tek DEX Double Eccentric Butterfly Valve is a durable, high-performance valve for waterworks and industrial use. Its double offset disc reduces wear and torque, featuring a ductile iron body, replaceable EPDM seat, and corrosion-resistant coating. Certified to NSF 61/372 and exceeding AWWA C504/C519 standards, it supports bi-directional flow velocities up to 24 ft/sec and offers multiple actuation options.

Learn more here: https://avtekvalves.com/product/dex-double-eccentric-butterfly-valves/

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PRODUCT DESCRIPTION:

Features & Benefits

  • Double Eccentric Design: Minimizes seat compression and friction—ideal for modulation and long service life.
  • Certified Zero Leakage: Bi-directional bubble-tight shutoff tested to AWWA C504/C519 and EN standards.
  • 316L SST Welded Body Seat: Robotic weld overlay ensures permanent, corrosion-resistant sealing surface—no pressed seats.
  • Dry Shaft Hub Design (8 O-rings): Prevents media intrusion, reducing wear and friction for longer service life and lower torque.
  • NSF/ANSI 61 & 372 Certified: Safe for use in potable water and meets regulatory standards.
  • Fusion Bonded Epoxy (14 mil DFT): Corrosion-resistant coating validated by holiday testing for integrity and long-term performance.
  • Field-Replaceable Seat: Simplifies maintenance—adjust or replace without removing valve from line or using specialized tools.
  • High-Strength 2205 Duplex SS Shafts: Superior corrosion resistance and strength—supports smaller shaft diameters for better flow.
  • Versatile Material Options: Body, disc, and seat options in Duplex SS, 316 SS, Aluminum Bronze, and Ebonite for aggressive media.
  • Actuation Flexibility: Supports manual, electric, pneumatic, and hydraulic actuators with ISO pad mounts.
  • Certified Performance: Third-party tested by Utah State University Water Research Lab—verifying real-world results.

Sector / Application

Why It’s Suitable

  • Municipal Water Systems: NSF-certified, corrosion-resistant, zero-leakage isolation—reliable for distribution & treatment.
  • Industrial Process Water: Handles high pressure (up to 275 PSI), chemicals, and temperature swings with advanced metallurgy.
  • Pumping Stations: Double offset design and high-velocity rating (24 ft/sec) support high-flow operations.
  • Raw Water Intake / Reservoirs: Resistant to biofouling and sediment wear with optional ebonite or bronze linings.
  • Power Plants / Utilities: Suitable for condenser water systems and other non-potable cooling circuits.
  • Seawater & Brackish Water: Available in Super Duplex and ebonite lining options for extreme corrosion resistance.

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