A good manufacturer to introduce electric pneumatic control valve products?

A good manufacturer to introduce electric pneumatic control valve products? Electric pneumatic - valve widely used in the precise control of gas, liquid, steam and other medium parameters such as pressure, flow, parameters such as temperature, liquid level in a given value. The manufacturer of the product has many, but the production process is different, so the price of the product is different. Now used by an industry, not only because it has many functions, so the use of more extensive, and the performance of the products in the development of science and technology driven, therefore, by using frequency is very high. Electric pneumatic control valve of operation and maintenance is introduced with the rapid development of China's industrial, electric pneumatic regulator in more and more widely applied in the field of metallurgy, petrochemical, its stability, reliability, also is more and more important, its working state is good or bad will directly affect the automatic control process, this paper will detail the use and maintenance of electric pneumatic control valve. Electronic single-seat pneumatic control valve, is made up of straight travel all electronic electric actuators and top guide through low flow resistance of single seat valve. With compact structure, light weight, action quick, fluid channels in an s-shaped streamlined, small pressure drop loss, large capacity of valve, precise flow characteristic, directly to adjust the instrument input ( 4 - 20mA DC 0- 10 ma DC or 1 - 5 v直流) Such as control signal and single-phase power supply can control operation, realize the process of the pipeline automatic adjustment control, warm prompt: electric pneumatic - valve product development depends on the progress of science and technology, today's products, it has been used in many industries. But I don't mean it at the time of installation and use can be simple operation, but should also be carried out in accordance with the formal instruction on!