GF Piping Systems introduced the new Type 567 Butterfly Valve in large diameter sizes up to 12 inches. Typical applications for the new corrosion-resistant valve include industrial water treatment, potable water treatment, swimming pools, water parks and wastewater systems in industries, such as chemical, chemical distribution, electroplating and power plants. Key to the valve’s double eccentric disk design is the off-centre shaft that allows the disc to completely disengage from the disc seal, even when partially open. This reduces seal friction and improves seal-wear characteristics, resulting in longer service life, minimal maintenance and better protection against pressure surges, says the company. The double eccentric design also lowers the torque required to operate the valve, making for easy manual operation and use of smaller actuators at a significantly reduced cost, says the company.