Is a pneumatic control valve or an electric control valve better for low-moisture coking?

Either one is fine; there isn’t much difference. You should mention the medium, pressure, and temperature that you are measuring

Thank you. I also want to ask about the response time of the electric valve – can it meet the time requirements for quenching coke with low water levels? I’ve only seen pneumatic valves; however, for low-moisture coking, the use of a gas supply is not allowed. So I was wondering whether electric valves can meet the requirements of low-moisture coking?

Are you using it to regulate flow or pressure? Or is it to be used as a cut-off valve? If it is for a shut-off valve, how many seconds do you require for it to close? Or open it?

It should be used to regulate flow rate. The requirements below pertain to low-moisture coking; can an electric valve meet these requirements? The water flow in the coking quenching system operates at two different speeds. At the start of the quenching process, the water flow rate is reduced to 40%–50% of the designed rate; this lower speed helps to cool the upper layer of coke while also stabilizing its surface, thereby preventing the coke from splashing out of the quenching chamber when the flow rate is at its higher designed value. The low-flow phase usually lasts for 10–20 seconds, after which the water flow rate is increased to the designed level, allowing the water to penetrate deep into the coke. After coking is stopped, the excess water inside the vehicle is quickly discharged outside through measures built into the vehicle structure. The low-moisture coking quenching system uses columnar water flow in place of spraying, improving the moisture distribution of the coke in the vertical direction and enabling complete quenching in a short time. Depending on the coke particle size, temperature, and conditions of the quenching vehicle, the overall quenching time is approximately 50–80 seconds.

Sure! I don’t think flow rate is the key factor. You should specify the maximum flow rate, normal flow rate, and minimum flow rate you need, as well as the valve pressure difference under these three flow rates, so that the manufacturer can determine whether it’s possible to meet your requirements. Using an electric actuator is definitely an option; I think the important thing right now is to ensure that the flow rate requirements can be satisfied!

These days, electro-hydraulic valves are widely used; for safety reasons, it’s better to choose solenoid valves