Processing Magazine

Double eccentric butterfly valve size line expanded

November 4, 2009
Butterfly valve line expanded to include sizes 14- to 16-inch. The valveā€™s unique double eccentric design features an off-center shaft that allows the disc to completely disengage from the disc seal, even when partially open. This results in reduced seal friction for longer service life and minimal maintenance compared to non-eccentric valve styles. The double eccentric design requires only about half the torque of a traditional boot design, which decreases wear on the disc seal to further enhance product life. Other advantages of this design include easier manual operation, compatibility with smaller actuators for reduced installation cost, and better protection against pressure surges. The new large size valve features industry-standard ISO flange mount for easy electric or pneumatic actuation with most actuators. Other features include bi-directional capability, pressure rating of 90 psi at 70 degrees F, and hand wheel. The valve is available in EPDM or FPM seals, 304 or 316 Stainless Steel stem, and a Polypropylene body. Suitable applications include landfills where large size valves are required for drainage of underground leachate. Other applications include industrial water treatment, potable water treatment, swimming pools, water parks and waste water systems in such industries as chemical, chemical distribution, electroplating and power plants.