3. Spring range of pneumatic control valve
Spring range: refers to the pressure of the membrane chamber when a valve is statically started to the pressure of the membrane chamber when it is fully stroked. 20~100KPa means that the pressure of the membrane chamber is 20KPa when the valve is started statically and 100KPa when it is closed. The commonly used spring ranges are 20~100KPa, 20~60KPa, 60~100KPa, 60~180KPa and 40~200KPa.

What is the current situation of the pneumatic butterfly valve industry? Today, I will give you an analysis from all aspects.
First, the cost of consumption has risen too fast, the raw materials have generally risen, the cost of labor has risen too fast, the problem of difficult employment and labor shortage is very prominent, and the wages of workers in the Yangtze River Delta, Pearl River Delta and other coastal areas have generally risen. The above two "costs rise too fast" squeeze the profit space of pneumatic butterfly valve enterprises.
Second, pneumatic butterfly valve enterprises are still heavily charged, and the fees charged by enterprises are still too high, and illegal fees still exist. For example, some central authorities use arbitrary charges to ease financial difficulties, some departments use their rights to collect fees to seek departmental interests, and some grass-roots law enforcement personnel use illegal charges to seek personal interests.
Third, since last year, in order to stabilize the achievements of the response to the financial crisis, China has implemented a prudent monetary policy, improved the bank reserve ratio for 12 consecutive times, and reduced the scope of credit, which has further increased the difficulty of financing for small and medium-sized pneumatic butterfly valve enterprises, especially small and micro pneumatic butterfly valve enterprises. A large number of small and medium-sized pneumatic butterfly valve enterprises are in urgent need of private lending, The borrowing rate has reached 50% - 100%, and the financing cost remains high. In 2010, China's current financial system was difficult to deal with the "bottleneck" problem of limited financing channels, small scope and high cost for small pneumatic butterfly valve enterprises.
Fourth, most of the small and medium-sized pneumatic butterfly valve enterprises are at the low end of the traditional industrial value chain, with weak technological innovation ability, extensive consumption and operation, low level of deployment, shortage of professional talents, lack of independent knowledge, property rights and brands, and mainly rely on "low cost, low price, low profit" to participate in the competition, which makes it difficult to digest the factors of rising operating costs in a timely manner, Conform to the ideal request of changing the mode of development and adjusting and optimizing the economic structure.
Pneumatic butterfly valve is popular because it can reduce pipeline devices