Over the years, electromagnetic control valve, which utilize magnetic force for the modulation of pilot valve, has replaced the air-operated valve(AOV) and motor-operated valve(MOV) by virtue of advanced technology for solenoid design. Its superior op...
Over the years, electromagnetic control valve, which utilize magnetic force for the modulation of pilot valve, has replaced the air-operated valve(AOV) and motor-operated valve(MOV) by virtue of advanced technology for solenoid design. Its superior operating characteristics and packless design make it favorable to be applied in most demanding applications such as nuclear and chemical plants. This paper deals with the steady-state characteristics of proportional flow control valve which regulates the large amount of high pressure fluid with two stage valve design. The main disc follows the pilot disc by the differential pressure that is changed with self-controlled system. The pilot pressure of control chamber, pilot flow and relative displacement of main disc to pilot disc at steady-state are investigated and the effect of main disc area ratio on the control characteristics is analyzed.