Working Principle of Control Valve + Diagram

Once the set point has been established, the control loop operates using a four-step process. Because the valves constantly match flow quantity to demand, they are especially efficient for temperature control. Danfoss thermostatic valves are used for the infinite, proportional regulation of flow quantity depending on the setting and the sensor temperature. Stringent requirements of the bioprocessing industry Weirless Radial diaphragm tank valves offer solutions to the most challenging applications. The compact design of the control valve minimizes the installation space required. The GP valves are qualified to Lloyd’s Marine Requirements for shipboard service.
Back pressure regulators are designed to handle very high pressure and very low flows. The HD series main regulating valve is available in sizes from ½” to 6” and the body is rated to 300 psig. The standard model should be used when the incoming pressure exceeds 15 psi. The low-pressure model should be used when the incoming pressure is less than 20 psi. van điều khiển điện can be integrated into a 4-way manifold to monitor inlet flow and divert the fluid based on temperature. Cooler fluid goes through the valve bypass, while hotter fluid goes through the system’s cooler.
Second, unlike a thermostatic valve, the actuated control valve permits flexible adjustments to the temperature range as operating conditions change. The temperature regulator is actuated by a mechanical temperature gauge. Due to the thermal expansion properties of the material, it swells as the temperature rises. This pressure controls the valve position in the regulator that regulates the flow of refrigerant. Thermotion’s Electronic Heater Control Valve consists of either a 2-port or 4-port bypass butterfly water valve powered by an electric actuator.
Using the external SPDT switch, the power is then applied to “terminal 3”, causing the actuator shaft to rotate 90° at which time another internal cam switch shuts off the motor. Gemini’s electric actuator also features a fold out manual override handle to enable the valve to be operated in the event of loss of power. If no air supply is available to power pneumatic devices, electric actuators are used. Armstrong self-actuated externally piloted temperature regulators are compact, high-performance units that are simple in design and operation – and suitable for a wide variety of applications. Flexible mounting positions of the sensor, interchangeable capillaries and varied temperature ranges make installation, adjustment and maintenance quick and easy.
Butterfly valve has fast switching speed and small fluid resistance, but the flow control linearity is not good, so it is suitable for occasions that only require quick opening and closing. The switching speed of the regulating valve is relatively slow, and the fluid resistance is large, but the linearity of the flow control is good, which is suitable for occasions requiring flow control. According to the starting method, the regulating valve can be divided into pneumatic regulating valve, electric regulating valve and self-operated pressure regulating valve.

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