Difference between programmable valves and control valves
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What is the difference between a programmable valve and a control valve?
Control valve: By comparing the process setpoint with the sampled value, it controls the degree of opening or closing of the valve, adjusting it so that the value at the sampling point matches the setpoint, enabling real-time adjustment online. Programmed control valve: Used for production processes that follow certain patterns. Valves that are switched on and off by a programmed controller under fixed operating conditions are generally referred to as programmable valve assemblies.
Adding to floor 2. In addition to online, real-time adjustment by control valves, there is also manual control for them. Control valves come in pneumatic, electric, hydraulic, etc. types, with pneumatic valves further divided into air-open and air-close types. Pneumatic control generally uses instrument air as the air source, while hydraulic control mostly uses oils.
Thank you to all the experts up there, and also thanks to Brother Long for adding money to my account. Hello, Brother Long! :handshake
Hehe, that’s an interesting question! As the name implies, a programmable valve is one whose operation is controlled by a program. Depending on the method of control, there are pneumatic programmable valves, hydraulic programmable valves, and electric programmable valves. Based on the type of valve, there are also programmable gate valves, programmable butterfly valves, programmable check valves, etc. As for control valves, they are, as the name suggests, designed for regulating processes. Depending on the parameter to be regulated, they can be classified into pressure control valves, flow control valves, temperature control valves, and so on. I think I’ve been clear enough from a technical perspective – do you all agree?
Are there programmable check valves? I’ve seen it; could you explain it in detail? :lol. A control valve is a device that, based on the deviation between PV and SV in the instrumentation loop, uses PID (proportional, integral, derivative) control to automatically monitor and regulate process parameters. Programmable valves are generally controlled through programmed settings; when a certain condition is met, a timer is activated to control the valve. Control is usually done via slope control, but it is also possible to open or close the valve immediately, depending on the requirements of the process.