There are several types of pneumatic ball valves. As the most widely used valve, pneumatic ball valves have the most types. A variety of types can meet users' requirements for different media occasions, different temperature environments and different processes in the actual process. The following describes the characteristics of several common pneumatic ball valves, such as floating pneumatic ball valve, fixed pneumatic ball valve, eccentric semi pneumatic ball valve, V-shaped pneumatic ball valve and fluorine lined pneumatic ball valve.

Classification of electromagnetic flowmeters The caliber range of electromagnetic flowmeters is wider than that of other types of flow meters. E+H Company provides three types of sensors, W, P and H, which are respectively used in the water and sewage industry (W type), the chemical industry, food industry (P type), and the food and pharmaceutical industry (H type). The caliber range is from 2mm to 2m. The transmitter can provide more than 10, 50, 23 and 53 options. 10 is economic type for water industry development, 50 is ordinary type, 53 is enhanced type, and 23 is two-wire system. The precision can be 0.5% or 0.2%. It can measure both positive and negative flow and pulsating flow.