The performance of the control valve and species

The working principle of automatic control valves _ the performance of the control valve and categories: 1. Control valve performance control valve is also called self-reliance type control valve, is a new type of control valve type, just as its name implies is don't need an external source and secondary instrument, rely on the flowing through the media in the valve itself of pressure, temperature as an energy drive valve work automatically, using the valve the output feedback signal, Pressure, differential pressure, temperature) , through the signal to the actuator, drive disc change of valve opening, to achieve the purpose of regulating pressure, flow, temperature. 2. Control valve type control valves according to the structure features, general can be divided into: self-reliance type temperature control valve, pressure regulator, self-reliance self-reliance type flow regulating valve, etc. , can be used to automatically adjust the applicable to most of the fluid medium. It will effectively energy into driving force of fluid, so as to control the valve opening closed. 3. Working principle of the automatic control valve when the fluid from the valve before flowing of the medium after the seat throttling valve core, into the valve after pressure. Then after on line input chamber at the top of the tray, then the force as opposed to a spring's reaction, etc. Thus determines the relative position of the valve core seat, and pressure control valve. When the valve after pressure increases in particular of the action of forces also will increase, make the position of the cage to the valve seat valve core, so that the gap between the valve core and valve seat is reduced, the flow resistance change after the big valve pressure is reduced. Until a particular reaction force and the spring on the phase equilibrium, so that after the valve pressure drop to the default value. When valve after pressure reducing, direction, in contrast to the said before, this is the working process of the automatic control valves. For the traditional control valve, control valve does not need external energy, is only by adjust the output signal of the medium, can effectively adjust the properties of fluid, this not only save some of the extra spending, can also reduce energy use, to the call of the national energy conservation and emissions reduction.