The electrical equipment in the electric temperature control valve (also known as temperature control valve) is a kind of equipment that can complete the monitoring short-range control of the control valve. The corresponding movement process is controlled by the pipeline interval, torque thrust. Let's understand it through the editor. Generally, the correct selection of electrical equipment for regulating valve is based on the following: task torque: task torque is the most important parameter for selecting electrical equipment for regulating valve. The input torque of electrical equipment shall be 1.2 to 1.5 times the torque of regulating valve.

Operating thrust: there are two types of main engine structure for electrical installation of electric temperature control valve: one is to input torque directly without a thrust disk; the other is to input torque directly without a thrust disk. The other is to configure the thrust disk, the input torque is converted into the input thrust through the stem nut of the thrust disk. Revolution of input shaft: the revolution of the input shaft of the electrical equipment of the electric temperature control valve is related to the nominal diameter of the regulating valve, the pitch of the valve rod the number of screw heads, shall be calculated according to M = H / ZS (M is the total revolution that the electrical equipment should meet, h is the turning height of the regulating valve, s is the pitch of the valve rod, Z is the number of screw heads of the valve rod). Stem diameter: for multi rotary open stem regulating valve, if the larger stem diameter allowed by electrical equipment cannot pass through the stem of matched regulating valve, it cannot be assembled into an electric regulating valve. Therefore, the inner diameter of the hollow input shaft of the electronic equipment must be larger than the outer diameter of the valve rod of the opened valve rod regulating valve. As for some rotary control valves black rod control valves in multi rotary control valves, although it is necessary to consider the stem diameter, the stem diameter keyway size should also be fully considered in the selection, so that their tasks are usually after assembly.

Input speed: if the switch speed of the regulating valve is too 

fast, water hammer is easy to occur. Therefore, appropriate opening closing speed should be selected according to different operating conditions. The electric installation of the control valve has its special requirements, that is, it must be able to limit the torque axial force. In general, the electrical installation of the control valve uses a torque limiting coupling. After the specification of electrical equipment is determined, its control torque is also determined. Generally, the motor will be overloaded if it is operated within the predetermined time. However, if the following conditions occur, overload can occur: first, the power supply voltage is low, the required torque is obtained, causing the motor to stop rotating;

Second, the torque limiting mechanism is wrongly set so that it is larger than the stop torque, which leads to excessive torque of the continuation, so that the motor stops rotating.

Third, intermittent operation, the heat generated exceeds the temperature rise allowed by the motor.

Fourth, the circuit of the torque limiting mechanism breaks down for some reason, resulting in excessive torque.

Fifth, the use of high ambient temperature, greatly reducing the thermal capacity of the motor. Over the past, the way to maintain the motor is to use fuses, over-current relays, thermal relays, thermostats, etc., but these methods have their own advantages disadvantages. There is no reliable maintenance method for variable load equipment such as electrical equipment