Sanitary pneumatic control valve for various pressure, temperature, flow, and other physical conditioning, such as food, pharmaceutical, cosmetic, clean steam, alcohol, beverage, chemical and biological industrial process control applications. Multi-spring diaphragm actuator and the sanitary control valve body composition, sanitary pneumatic control valve with a compact, easy assembly and disassembly, regulation and high precision, especially in the pressure drop, flow rate, adjustable wide range of flow high precision, fully comply with IEC534-1978 standard, the valve leakage meet ANSI B16.104 standards.
Sanitary pneumatic control valve designed to ensure the use of angle from the discharge valve, standard electronic polished, smooth surface to ensure clean and free of media accumulation area, no potential contamination. Quick disassembly Body and bonnet of the valve to open and repair quick and easy, making the process downtime.
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1. Role of Self-Control Valve
Self-regulating valve are using the output feedback signal valve (pressure, pressure, temperature) to pass through the signal tube to the valve actuator drive change in the valve opening, to adjust the pressure, flow, temperature.
2. Self-regulating valve of the advantages of
Self-regulating valve is a new type of self-regulating valve. Compared to manual control valve, it has the advantage is the ability to automatically adjust; relative to the electric control valve, which has the advantage of no external power. Application proved that the closed-loop water system (such as hot water heating systems, air conditioning chilled water system), the proper use of this valve, the system can easily achieve the flow distribution; can achieve the dynamic balance of the system; can greatly simplify the debugging; can stabilize the pump working status.
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Abstract: The pneumatic control valve selection factors. According to chemical production process conditions, select the appropriate structure and type of control valve; according to the process object, select the appropriate flow characteristics; according to process parameters, calculation of flow coefficient, select the control valve bore; according to process requirements, selection of materials and auxiliary equipment.
Keywords: control loop; pneumatic control valve; options
Modern chemical industry, high level of automation in process control, actuator control quality and production conditions of stability are closely linked, so the choice of the actuator is particularly important, safety explosion-proof requirements for the chemical industry is relatively high , the vast majority is used in pneumatic actuator control valve.
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Abstract: Pneumatic Diaphragm Control Valve detailed working principle of rule flow characteristics, C value, the determination of diameter, and the combination of aluminum slurry Section of Journal of Shanxi Branch of slurry transport in control, as to the correct selection and application process The right to amend the actual situation, and the installation process for attention.
With the rapid development of China’s nonferrous metals industry, pneumatic membrane valves as simple structure, convenient operation, reliable, fire proof, etc., are widely used in the production of alumina. The automatic control system as an important part of its working condition is good or bad will directly affect the control process, Based on its own based on the practical work described in detail Pneumatic Diaphragm Regulating Valve’s working principle, selection process, installation and maintenance.
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Abstract: The electric control valve output is difficult to use an accurate digital model to describe, but it can accurately measure. In view of this feature, step-style control of the input signal does not directly respond, but the number of fixed points of the step, according to the measurement result for each input command signal step by step approach to set the amount. The reasonable control parameters set, the method to control the object is stable, suitable for less demanding on the response speed of the flow or pressure to follow or stability control.
Keywords: electric valve; Stepping control; step; sampling period; response speed
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Abstract: In the unit capacity of 50MW and below the small electric power plants often use a regulating valve means, the choice of electric valve if appropriate, directly affecting the quality of automatic control system of regulation. This will electric control valve selection and the method of calculation are introduced.
Keywords: electric valve; single seat; two-seater; flow characteristics; flow capacity
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