1. Explanation:
The electric three-way ball valve is composed of an electronic electric actuator and a three-way ball valve. It is a rotary cut-off regulating valve with the advantages of tight closing, compact structure, light weight and convenient maintenance. It is widely used in pipeline automation control of corrosive media such as gas, liquid, steam and oil.
The two-seat sealed three-way ball valve has compact structure, beautiful appearance and good sealing performance. It can realize the switching of the flow direction of the medium in the pipeline. It is also possible to connect or close two channels that are perpendicular to each other.
The four-seat sealed three-way ball valve has beautiful appearance, compact and reasonable structure. It can not only switch the flow direction of the medium, but also connect the three channels with each other. At present, one channel can also be closed, so that the other two channels are connected, and the control is flexible. Confluence or diversion of media in pipelines.
2. The principle of medium flow direction of electric three-way ball valve
Three-way ball valve is divided into L type and T type.
The L-type three-way ball valve is suitable for switching the flow direction of the medium, and can connect two channels that are perpendicular to each other: the T-type three-way ball valve is suitable for the splitting, confluence or flow direction switching of the medium. Two of the channels are connected, and the three-way ball valve generally adopts a two-seat structure, and can also adopt a four-seat structure according to user requirements.
3. Electric three-way ball valve electrical parameters
Electric actuator type: quarter-travel electronic electric actuator.
Technical parameters and performance: Please refer to the instructions of the corresponding actuator and valve positioner.
Control accuracy: 0.1%~3.1% adjustable.
Accept control signal: 0~10mA.DC, 4~20mA.DC or 1~5V.DCv
Key selection: 1. When the input signal is interrupted: "interrupt" mode (on, off, off)
2. Positive and negative action selection
3. Control precision selection. Automatic positioning and calibration of the fully open and fully closed positions of the moving device, which is convenient and accurate.
According to the input signal and the position of the electric device, the intelligent step adjustment and automatic positioning are carried out, and the oscillation suppression precision is high.
Output position signal of electric device: 4~20mA.DC corresponds to fully closed and fully open of electric device.