In a mixing valve, two incoming streams are combined into one outgoing stream. In a diverting valve, the opposite takes place. The exiting port of the mixing valve and the entering port on the diverting valve are called the common port, typically labeled C (for common), or sometimes AB. Three-way valves are useful in services where a flow stream must be diverted (split) between two different directions, or where two flow streams must converge (mix) within the valve to form a single flow stream. Aira is a reputed brand all across India, specialising in pneumatically operated valves, their 3CVS model mixing and diverting valve is made by taking into consideration all standards, the body is of CF8 / CF8M having high nitrile and PTFE seals which makes the valve suitable for high temperatures upto 180C they are also as per ANSI B 16.04 – 1976 which makes them leakage class VI drop tight / bubble tight. The actuator cover or cap is made of SS 304 which makes it corrosion resistant to not only water but also resistant to reaction by any chemicals. To serve various purposes, the valves are available in both double acting and single acting with option for the resting state of the valve to be normally open or closed.