1 the role of self-reliance type regulator self-reliance type regulator use valve the output feedback signal, Pressure, differential pressure, temperature) Through signal to the actuator driven disc change of valve opening, to achieve the purpose of regulating pressure, flow, temperature. 2 regulator of the advantage of self-reliance self-reliance type regulator is a new type control valve types themselves. Compared with the manual control valve, its advantage is able to automatically adjust; Relative to the electric control valve, its advantage is not need external motivation. The application practice proved that the closed water circulation system ( Such as hot water heating system, air conditioning chilled water system) The proper use of the valve, the flow distribution can be easily implemented system; Can realize the dynamic equilibrium of system; Can greatly simplify the system debugging work; Fix the pump working condition, etc. 3 classification of self-reliance type regulator self-reliance type regulator is divided into direct effect and indirect effect type two kinds. Direct acting regulator direct acting regulator is also known as the spring load type valve, its have elastic element structure: such as spring, bellows, bellows type of bulb, etc. , the principle of balance with the elastic force feedback signal. Indirect effect type regulator indirectly type regulator, add a command ( Pilot valve) It play a role of feedback signal amplification and then through the actuator, drive the main valve disc movement to achieve the purpose of the change of valve opening. If it is a pressure regulator, feedback signal is the valve outlet pressure, by introducing actuator signal pipe. If it is a flow control valve, the valve outlet has an orifice ( Or other resistance devices) Introduced by orifice plate ends out differential pressure signal actuators. If the temperature regulating Industrial Valves, valve of the export is the temperature sensor ( Temperature or package) Through the temperature sensor in medium heat bilges cold shrink drive actuators. Self-reliance type characteristics of the four self-reliance of the regulating valve, regulator without additional energy, can work in the absence of electric airless place, convenient and save the energy. Pressure piecewise range and cross each other, high precision of adjustment. Pressure setting can be set in a continuous during operation. After the valve pressure regulation, valve pressure before and after the valve pressure ratio of 10:1 ~ 10:8. Rubber diaphragm detection, high measurement precision, actuator. Using pressure balance mechanism, the regulator is responsive, precise control.
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