Pneumatic ball valve is a complete set of valves composed of high platform ball valve and pneumatic actuator. The pneumatic ball valve is equipped with a pneumatic actuator. The execution speed of pneumatic actuator is relatively fast, and the fastest switching speed is 0.05 seconds/time, so it is usually also called pneumatic quick cut-off ball valve.

[Operating principle of electromagnetic flowmeter] The electromagnetic flowmeter is a flowmeter for flow measurement according to Faraday's electromagnetic induction law. The advantage of electromagnetic flowmeter is that the pressure loss is very small and the flow range can be measured is large. The ratio of maximum flow to minimum flow is generally more than 20:1. The applicable industrial pipe diameter range is wide, up to 3m. The output signal and the measured flow are linear, with high accuracy, and the measurable conductivity is ≥ 5 μ S/cm of fluid flow of acid, alkali, salt solution, water, sewage, corrosive liquid, slurry, pulp, etc. But it cannot measure the flow of gas, steam and purified water.