Advantages and disadvantages of electric valves

Electric valve is a device that is driven by an electric motor to open and close the valve, which is widely used in industrial and civil fields. The advantages and disadvantages are as follows:

Advantages

High degree of automation: the electric valve can be integrated with the automatic control system, through the remote control signal to realize the opening and closing operation of the valve, without manual on-site operation, greatly improving the automation level and management efficiency of the production process. In some large chemical, electric power and other factories, operators can centrally control and monitor a large number of electric valves through computer systems in the control room to realize the automatic operation of the process.

High control precision: can accurately control the opening of the valve, to achieve the precise adjustment of fluid flow, pressure, temperature and other parameters. Electric valves are usually equipped with high-precision position feedback devices and control circuits, which can accurately control the opening Angle of the valve according to the input signal, so as to meet the strict requirements of flow control in different technological processes. For example, in some high-precision experimental equipment or pharmaceutical production lines, electric valves can accurately control the flow of fluid to ensure the stability of product quality.

Fast action speed: the opening and closing speed of the electric valve is relatively fast, which can complete the action of the valve in a short time to meet the requirements of some occasions for fast response. For example, in some emergency cut-off systems, the electric valve can be closed quickly after receiving a signal to prevent the expansion of the accident.

Large output torque: through the selection of different power motors and transmission mechanisms, to meet the needs of different load conditions under the valve drive, can easily drive large diameter, high pressure valves. In long-distance pipelines in industries such as oil and gas, electric valves can effectively control fluid delivery in large diameter pipelines and operate reliably even under high pressure differences.

Convenient operation: The operation is simple and convenient, only through the control button or remote signal to realize the opening and closing of the valve, without the need for manual rotation of the handwheel or handle as the manual valve, reducing the labor intensity of the operator. Moreover, the electric valve can be operated remotely, and the operator can control the valve from a place far away from dangerous or harsh environments, which improves the safety of operation.

Disadvantages

Dependence on power: The normal operation of the electric valve is completely dependent on the power supply, and if the power supply fails, such as power failure, voltage fluctuation, etc., the electric valve will not work. In some occasions where the reliability of power supply is extremely high, such as nuclear power plants and key equipment in hospitals, it is necessary to equip backup power or take other emergency measures to ensure the normal operation of electric valves.

High cost: the purchase cost of electric valves is relatively high, including the cost of the valve itself, the motor, the control equipment, and the installation and commissioning. Moreover, due to its relatively complex structure, it contains multiple components such as motors, electronic components and transmission mechanisms, and the later maintenance cost is also high, requiring professional technical personnel for repair and maintenance.

Complex structure: The structure of the electric valve is more complex than the manual valve or pneumatic valve. It is composed of multiple parts such as the motor, the deceleration mechanism, the position feedback device, and the control circuit. The failure of any component may lead to the failure of the valve. This requires that in the process of design, manufacturing and use, more attention should be paid to the quality and reliability of products, but also increased the difficulty of troubleshooting and maintenance.

Limited environmental adaptability: in some harsh working environments, such as high temperature, low temperature, humidity, corrosive gases, etc., the performance of the electric valve may be affected, and even failure. For example, in some chemical production workshops, corrosive gases may erode the motor and electronic components of electric valves, reducing their service life and reliability.