 TUSTIN, Calif. – Aug. 24, 2010 – GF Piping Systems has announced expansion of its large diameter size range for the Wafer Style Type 567 Polypropylene Butterfly Valve to include sizes 14"–24". This completes the large diameter size offering of 12"–24" and broadens suitability for a wider range of applications. Like the proven smaller sizes in the series, the new larger-sized valves feature the double eccentric design, excellent corrosion resistance, and complete modularity for easy interchangeability. The Type 567’s unique double eccentric off-center design allows the disc to completely disengage from the disc seal, even when partially open. This separation between disc and seal reduces friction and wear for longer service life and minimizes maintenance compared to non-eccentric valves. Additionally, the double eccentric design requires only about half the torque of a traditional boot design, which also reduces wear on the disc seal to further enhance product life. Other advantages of the design include easier manual operation, compatibility with smaller actuators for reduced installation cost, and better protection against pressure surges. The Type 567 Large Diameter Valves are suitable wherever large volumes of liquids need to be conveyed safely and reliability, such as in water treatment or chemical processing. Typical 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. In larger sizes, weight becomes an important factor for installation. These butterfly valves weigh approximately 50 percent less than comparable metal butterfly valves thereby providing easier and faster installation and lower costs. The new large dimensions provide high nominal pressures for increased operation safety. Pressure ratings at 70ºF are 90 PSI for sizes14"–16", 75 PSI for size 18", and 60 PSI for sizes 20"–24". Other features include industry-standard ISO flange mount for easy electric or pneumatic actuation, bi-directional capability, and hand wheel. The valve is available with either EPDM or FPM seals, 304 or 316 Stainless Steel stem, and a Polypropylene body. “The completion of the butterfly valve offering through 24-inch sizes broadens our application capabilities and provides more solutions for our customers,” explains Brian Gordon, GF Piping Systems Product Manager.
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