Self-regulating valve to rely on its own medium flowing through the valve pressure, temperature as an energy-driven valves work automatically and requires no external power supply and the secondary instrument. This Self-regulating valve are making use of valve output feedback signal (pressure, pressure, temperature) through the signal tube passed to the implementing agency-driven valve flap to change the valve opening, to regulate pressure, flow, temperature. This control valve is further divided into direct and indirect effects-action-type two kinds.
Direct-acting type is also known as spring-loaded type, its structure and flexible components, such as springs, corrugated tube, corrugated tube temperature packs, using elastic force and the principle of balance between feedback signal.
Indirect effects of type regulating valve, an increase of a command device (pilot valve) it played the role of the feedback signal amplification and then through the implementing agencies, driving the main valve valve valve movement to achieve the purpose of changing the valve opening.
If the pressure regulator valve, the feedback signal is the valve outlet pressure, the introduction of the implementing agencies through the signal tube.
If the flow control valve, valve outlet there is a plate (or other resistance devices) removed from the pressure plate at both ends of the signal to introduce the implementing agency.
If it is the temperature control valve, valve's exports have temperature sensors (or warm pack) through the temperature sensor of the thermal expansion and contraction within the media-driven executive body. ball valve Trunnion Mounted Ball Valve Floating Ball Valve
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