GF Piping Systems has expanded its large diameter size range for the Wafer Style Type 567 polypropylene butterfly valve to include sizes 14-24in. This completes the large diameter size offering of 12-24in and broadens suitability for a wider range of applications. 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. Additionally, the double eccentric design requires only about half the torque of a traditional boot design, which also reduces wear on the disc seal. The Type 567 large diameter valves are suitable for 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. The new large dimensions provide high nominal pressures for increased operation safety. Pressure ratings at 70F are 90PSI for sizes14in-16in, 75PSI for size 18in, and 60PSI for sizes 20in-24in. Other features include industry-standard ISO flange mount for easy electric or pneumatic actuation, bi-directional capability, and hand wheel.
