Butterfly valves GEMÜ 410, 417 and 423 also available up to nominal size 100

The butterfly valves in nominal sizes 15 – 50 - and up to 100 beginning in January 2012 - can be installed quickly and easily. They are easier to install than wafer and LUG type butterfly valves. In addition, the valve bodies of the butterfly valves come as standard with male threads. Therefore, no additional flanges, bolts, nuts and washers are required for installation in pipe systems. This simplifies installation and saves time and materials. Another advantage is compact installation length in all nominal sizes. This saves space and allows for cost-effective plant design.

Depending on requirements, butterfly valves have pneumatic, manual or motorized operators custom-built for each specific application. The GEMÜ 410 butterfly valve is equipped with a low-maintenance, corrosion-resistant plastic pneumatic quarter turn actuator. Control functions "normally closed", "normally open" and "double acting" are available. The butterfly valve is optionally available with a stroke limiter and position indicator. GEMÜ 417 has an ergonomically designed manual operator with integrated locking device and intermediate stop in nominal sizes to DN 50. In DN 50 and larger the butterfly valve is fitted with a lockable hand lever which protects the butterfly valve against accidental operation. GEMÜ 423 has a low-maintenance motorized actuator with a powerful DC motor. The actuator features an optical position indicator and manual override as standard. The end positions can be adjusted electrically using microswitches.

All wetted parts of the soft-sealing butterfly valves are manufactured from high-grade plastic. They are corrosion resistant and are particularly well-suited for use in corrosive environments. To a certain extent, media may also contain solid matter. The potential applications of butterfly valves are highly diverse, from control and regulation of inert to corrosive media at medium temperatures between 10 and 60 degrees Celsius and pressures up to 6 bar.