Pneumatic rubber lined butterfly valve, with flange and clamp connection, and sealing lining of NBR, EPDM, heat resistant EPDM, natural rubber, neoprene, fluororubber, polytetrafluoroethylene, has a more reasonable choice according to the chemical properties of the medium.

2 Bluetooth application system design uses Bluetooth wireless communication in the industrial field. The hardware design of the system is divided into two parts: valve pneumatic device and handheld operator.