The high-temperature sleeve electric control valve employs a cylindrical thin-walled window-type valve core guide. It is equipped with a DKZ linear-travel electric actuator, which receives 0–10 or 4–20 mA DC signals to drive valve opening and closing. This electric high-temperature sleeve control valve is used to mix two fluids into a third fluid, or to blend fluids of the same type but different temperatures into a fluid of uniform temperature. The three-way diverter valve splits one fluid stream into two separate fluid streams.