We are offering here the Rotary Valves of various types that are a type of valve in which the rotation of a passage or passages in a transverse plug regulates the flow of liquid or gas through the attached pipes. The common stopcock is the simplest form of rotary valve. These types of valves have been applied in numerous applications, including: Changing the pitch of brass instruments. These are pneumatic valves that handle and meter the flow of granular bulk or powders. They are used to ensure gentle, reliable and economical handling of powders and pellets or granules. Rotary Valves are made for industrial purposes.