Launched in April, this new generation of diaphragm valves (photo) is said to have a number of decisive advantages in handling and safety, but also in regard to efficiency. The flow in these valves is, on average, double that of conventional diaphragm valves, says the manufacturer. The central plastic thread, which is used instead of the normal four metal screws, guarantees a corrosion-resistant connection. The more homogeneous thermal expansion behavior achieved by this central plastic thread also eliminates the need for retightening. Leak tightness is provided for operating pressures of up to 16 bar. — Georg Fischer Piping Systems, Schaffhausen, Switzerland