I would like to ask about the four-way valve on the coke tower
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The four-way valves used on our plant’s coke towers are electric ball-type steam-sealed valves; I’m not sure how they switch between different modes of operation. Could someone with expertise please explain this to me?
The four-way ball valves used in coke towers are generally electrically driven, equipped with an on-site three-position logic control panel, as well as on-site control buttons for the isolation valves and indicators for the valve position; the control system features self-locking interlocks； It is equipped with a 24V relay to transmit signals to the DCS, and allows for remote transmission of valve position indications. The switching is carried out in accordance with the requirements of the process operation, with the principle of maintaining a constant flow rate during the switching process, and ensuring that the two towers can be isolated from each other after the switching