Electric pneumatic control valve in the role of air conditioning water system control

Electric pneumatic control valve is an important execution units in industrial automation process control instrumentation. With the improvement of people demands for comfort air conditioning, and air conditioning energy saving problem has increasingly become the focus of attention, such as electric pneumatic - valve control has been more and more widely used in air conditioning system. For air conditioning water system of the electric pneumatic regulator is one of the automatic adjustment basic actuators. Electric pneumatic valve actuator with servo function, 4 - accept reunification Ma or 1-20 5 v DC standard signal, convert current signal to the corresponding linear displacement, automatically control the pneumatic - valve opening, to achieve the fluid inside the pipeline pressure, flow, temperature, liquid level and other process parameters of continuous adjustment. Electric pneumatic control valve and energy saving, environmental protection, convenient installation. Project general according to the loop at the end of the electric pneumatic - valve differential pressure to determine the right, the right redefined as selection right of degrees, and introduce the concept of system rights and actual rights degrees, pneumatic control valve of air conditioning water system actual operating characteristics are analyzed. 5 conventional selection method may lead to small electric pneumatic regulator actual power degree, poor regulation performance; 6 range selection, selection of right degree should be in the most unfavorable loop at the end of the total pressure difference as a benchmark.