How to adjust the leakage of pneumatic desulfurization butterfly valve? 4 Conclusion At present, various specifications of double eccentric semi pneumatic ball valves have been applied to various projects in different industries, with good results and gradually expanding the scope of use.
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.
