For ball valve devices, it is not cheap to buy, not high price is the most suitable. Instead, it is necessary to find the most suitable flow limiting device with good quality and low price according to various investigations. In order to help you choose and purchase pneumatic switch ball valve correctly, I would like to share with you some shopping points. 　　

For example, pneumatic butterfly valves can be divided into four types according to their structural forms: offset plate type, vertical plate type, inclined plate type and lever type. According to the sealing form, it can be divided into soft sealing type and hard sealing type. The soft seal is rubber ring seal, and the hard seal is metal ring seal. According to the connection form, it can be divided into flange connection and wafer connection. The transmission mode can be divided into manual, gear transmission, pneumatic, hydraulic and electric.