In order to meet the application requirements of industrial applications such as high and low temperature, strong erosion and long life, metal sealed butterfly valves have been greatly developed in the past decade. With the application of high temperature, low temperature, strong corrosion, strong erosion and high-strength alloy materials in butterfly valves, metal sealed butterfly valves have been widely used in industrial fields such as high and low temperature, strong erosion and long service life. There are butterfly valves with large diameter (9750mm), high pressure (2.2kN/cm2) and wide temperature range (- 102~606 ℃), So that the technology of butterfly valve can reach a new level.

Pneumatic butterfly valve machine is broken in localization
The independently developed numerical control system and key functional components, separated fine mechanical polishing machine (part of the machine body), integrated innovation, and completed the complete localization of high-end numerical control machine tools for the first time. Its central "brain" - numerical control system, "limbs" - key functional components, such as turntable and turnhead, have complete independent intellectual property rights, and reach the level of world leadership.
The numerical control system adopts optical fiber bus technology, with up to 6 axes in effective cooperation, and the control frequency reaches 2000 times per second. It is equivalent to sending 2000 commands to the machine every second, and any small action is set by the program. The stainless steel belt is processed into a stainless steel hose with a diameter of 5mm - for a long time, China has been relying on imported high-end CNC machine tools to complete similar tasks. Two high-end pneumatic butterfly valve machines developed by Tongfeng pneumatic butterfly valve have reached the level of world leadership, filling the domestic gap, marking the completion of localization of high-end pneumatic butterfly valve machines in China. These two machines are respectively "4-axis 5-linkage vertical pneumatic butterfly valve machining center" and "2-axis 3-linkage horizontal stainless steel hose machining center". Pneumatic butterfly valves and stainless steel hoses are widely used in defense and military industry, aerospace, automobile and shipbuilding, and equipment manufacturing. In the world, only three or four foreign companies can provide machines to complete these large-scale high-precision complex processing.