Hey, your little control in the housekeeper online, was surprised to find the difference between last time hair of regulating valve and control valve, should read, little housekeeper was quite happy, as long as can bring the useful and interesting knowledge, just don't feel tired, you want to look at the regulator of small knowledge, little housekeeper summarizes the regulator for everyone today some of the basics, let's kangkang,
Regulating valve and control valve, by accepting conditioning control unit of the output control signal, from engine operation to change fluid flow, regulating valves and valve general, the executing agency, if by their ticket enforcement agencies use the power, the valve can be divided into pneumatic control valve, electric valve, hydraulic control valve of three, in addition, according to its function and feature points of linear features, such as characteristic, parabolic features three percentage,
Regulating valve body is a lot of more phyletic, the commonly used types of the body is through single-seat, pass-through two-seater, angular, diaphragm, small flow rate, tee, eccentric rotating, butterfly, sleeve, such as spherical,

Working principle of the pneumatic control valve
Pneumatic control valve is with compressed air as power source, with cylinder as actuator, and by means of electric valve positioner, converters, solenoid valves, accessories such as the position control valve to drive the valve, the switch quantity or proportion type adjustment, industrial automation control system receives the control signal to complete adjustment of pipeline medium: flow, pressure, temperature and other process parameters, pneumatic control valve is to control the characteristics of simple, quick response, and intrinsically safe, don't need another explosion protection measures,

Self-reliance type valve working principle
Self-reliance type regulator is used to adjust in the field of industrial automation process control medium flow rate, pressure, temperature, liquid level and other process parameters, according to the control signal of the automation system, the automatic adjustment of valve opening, so as to realize the medium flow rate, pressure, temperature and liquid level adjustment,
A, self-reliance type temperature control valve working principle (heating)
Temperature control valve is based on incompressible fluid and the working principle of heat bilges cold shrink, heating self-reliance type temperature control valve, when the temperature of the controlled object is lower than the set temperature, the temperature inside the package liquid contraction, the forces acting on the actuator push rod, valve core components under the action of spring force to make the valve opened, to increase the flow of steam and hot oil heating medium, the temperature rise of the object, and until the temperature of the object to the set value, the valve closed, valve is turned off, temperature drop of the object, and valve opening, the heating medium and into the heat exchanger, and the temperature rise, such making that the controlled temperature is constant value, the valve opening size and the controlled object of the actual temperature and set temperature difference,
Working principle of the two, self-reliance type temperature control valve (cooling)
Cooling heat with self-reliance type temperature control valve working principle can consult with self-reliance type temperature control valve, just when the valve core components in the actuators and the spring force under the action of opening and closing valves closed and temperature on the contrary, the body through the cold medium, mainly used in cooling device of temperature control,

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