1. Overview of pneumatic control valve:
The pneumatic control valve uses the compressed gas (usually purified compressed air) as the power source, the cylinder as the actuator, and the power distribution/gas valve positioner, electric/gas converter, solenoid valve, retaining valve, gas tank, gas filtration/pressure reduction/oil mist separator and other accessories to drive the valve according to the actual needs to achieve the regulation goal, Receive the control signal from the industrial automation control system to adjust various process parameters such as flow, pressure, temperature, liquid level, etc.

Analysis of hose influence situation
China is a big country of consumption and export, among which most of the pneumatic butterfly valves sold globally are consumed and exported from China, which once became the world's major supplier of pneumatic butterfly valves. Although China's pneumatic butterfly valve industry has a large scope, many pneumatic butterfly valve consumer enterprises often lack central competitiveness and are difficult to become bigger and stronger due to weak technological innovation ability, too single market structure, weak brand influence and other factors.
The sales volume of stainless steel hose is 14.5 billion yuan, of which the proportion of threaded stainless steel hose is less than 25%, which is not only far from the structure of hose products in the international market, but also cannot meet the growing demand of domestic manufacturing industry for stainless steel hose.
In 2010, the structural imbalance of pneumatic butterfly valve was the wrong way between consumption hose and demand. For example, the gap of optical fiber maintenance hose required by users is large, but the consumption of galvanized pneumatic butterfly valve is excessive; The double button stainless steel hose urgently needed by modern manufacturing industry is in great demand, but the low-grade single button stainless steel hose is overspent.