Analysis the forerunner design points of the pneumatic valve ( 1)

the forerunner pneumatic valve with its small size, compact structure, good sealing effect, cut off, the high applicability is wide and its usage life ( Up to the rated pressure) The ability, has been widely applied in the automatic control system. The pneumatic valve can be used as an outlet by the pneumatic valve, especially the high temperature, high pressure and large diameter need to cut off the occasion.
pilot circulation, top-down structure and independent pilot pressure pneumatic balance valve pneumatic control valve of pneumatic valve closed, closed by a main pneumatic valve pneumatic valve set pressure and the gap between the back pressure, pneumatic valve seat seal, when the forerunner of pneumatic valve and the main pneumatic valve must meet specific pressure, the media, the higher the pressure, pneumatic valve seal more closely. When you want to open the pneumatic valve and actuator, in order to improve the dry, to open the first pilot pneumatic valve, the forerunner of the pneumatic valve mainly has a larger flow socket, pneumatic valve, pneumatic valve closed the main pneumatic valve to create a balance, thereby smaller forced open the pneumatic valve.
the forerunner pneumatic valve pneumatic control valve is designed, in addition to consider to close the pneumatic valve performance, consider and adjust the pneumatic valve performance is stable. Pilot pneumatic valve seat is greater than the channel capacity, in order to meet the guide ring and the main pneumatic valve and the sleeve of the flow capacity of pneumatic valve gap, in the pneumatic control valve open % or below, open the pneumatic valve is opened, will fight for are not bright or small flow range of problems can not be adjusted.
the spring stiffness of spring design principles, in order to meet the media pressure fluctuations, or the forerunner of pneumatic valve and the main pneumatic valve can produce between vibration and other problems.
annular pneumatic valve guide assembly effect is to increase the sleeve design of pneumatic valve and temperature stability limit of the huge gap led to the gap flow ability and the forerunner of pneumatic valve pneumatic problem caused by the flow channel capacity does not match the seat.
the only role is to control the forerunner pneumatic valve and the main trend of the eddy current produced by the rotation of the disc resale, and spring is made up of the forerunner of pneumatic valve and the trend of the pneumatic valve disc up and down the main vibration direction control.