Type 567/568 butterfly valve series

Designed for industrial, potable and wastewater treatment systems, the Type 567/568 butterfly valve series features a double-eccentric-disk design typically found only in high-end metallic configurations. This double eccentricity reduces seal friction and wear, resulting in longer service life, minimal maintenance and better protection against pressure surges. It also lowers the torque required to operate the valve, easing manual operation and allowing the use of smaller, less expensive actuators. The 567/568 series feature a modular design ranging in size from 2 in. to 8 in., with either a glass-filled polypropylene wafer body (Type 567), or an epoxy-coated iron lug body (Type 568). The inner body, disks, and bearings are available in PVC, polypropylene and polyvinylidene fluoride. The lockable ergonomic lever enhances worker safety via a 5-deg ratchet setting that ensures precise positioning of the lever and eliminates incidental movement due to accidental bumping of the handle. Other safety features include an integrated electric position indicator in the mounting flange that shows whether the valve is open or closed. An index plate clearly indicates the angle opening in degrees.