How many types of electric control valves are there and what are their advantages and disadvantages?

An electric control valve is a type of valve that uses electricity as the driving source and an electric actuator to drive the valve core to act, achieving automatic control of parameters such as medium flow, pressure, and temperature. According to the differences in valve structure, electric control valves are mainly classified into the following types:

1. Electric single-seat control valve

Advantages: Low leakage (up to less than 0.01% of the rated capacity), good sealing performance, and high regulating accuracy.

Disadvantage: The unbalanced force exerted by the fluid on the valve core is relatively large, making it unsuitable for high-pressure differential working conditions. It is relatively difficult to open under a large pressure difference.

Ii. Electric Double-seat Control Valve

Advantages: There are two valve seats inside the valve, with small unbalanced force, large allowable pressure difference and large flow capacity.

Disadvantages: The leakage is larger than that of single-seat valves, and the sealing performance is not as good as that of single-seat valves.

Iii. Electric Sleeve Control Valve

Advantages: Large flow coefficient, good stability, large allowable pressure difference, less prone to vibration, and easy to install and disassemble. Different flow capacities and flow characteristics can be obtained by replacing different sleeves.

Disadvantages: The structure is relatively complex and there are certain requirements for the cleanliness of the medium.

Iv. Electric Three-way Regulating Valve (Converging/Diverting)

Advantages: It can simultaneously achieve the convergence or diversion regulation of two media, and has a compact structure.

Disadvantages: It is mostly used in distribution or mixed working conditions, and the diameter specifications are relatively limited.

V. Electric Angle Control Valve

Advantages: Simple flow path, low resistance, suitable for high-viscosity media containing suspended particles, not prone to clogging, and easy to clean.

Disadvantage: The flow direction is restricted, usually bottom in and side out.

Vi. Electric Diaphragm Control Valve

Advantages: Smooth flow channel with no dead corners, suitable for corrosive or particle-containing media, and good sealing performance.

Disadvantages: The temperature and pressure resistance grades are relatively low, and the diaphragm life is limited.

Vii. Electric Fluorine-lined Bellows Control Valve

Advantages: Resistant to strong corrosive media, and the bellows seal can effectively prevent external leakage.

Disadvantages: Limited applicable temperature and relatively high cost.

Viii. Electric regulating ball valves and butterfly valves

Advantages: Ball valves and butterfly valves are the most widely used electric valves. The ball valve has good sealing performance and is suitable for high pressure. Butterfly valves have a simple structure, small size and light weight, and are suitable for large-diameter low-pressure pipelines.

Disadvantages: The adjustment accuracy is average. It is more suitable for two-position cut-off or occasions where the linear adjustment requirement is not high.

Electric control valves of W&T

As a German valve brand with nearly a century of technological accumulation, W&T can trace its history in the field of electric control valves back to 1932. It specializes in manufacturing a full range of valve products represented by automatic control control valves, which are mainly applied in harsh working conditions such as high pressure, high temperature, easy erosion and corrosion.

Under harsh working conditions such as high temperature, high pressure, and high pressure difference (such as boiler feed water regulation in power plants and control of chemical reactors), Viti's electric control valves are made of high-temperature resistant materials, equipped with precise actuators and multi-stage pressure reduction designs, enabling high-precision control and long-term stable operation. Its core products cover types such as desuperheating water regulating valves, feed water regulating valves, sleeve regulating valves, and Angle regulating valves. They are suitable for industrial process automatic control systems in industries such as power, petroleum, chemical engineering, and metallurgy, and can meet the precise regulation requirements under complex working conditions such as high temperature, high pressure, and strong corrosion.

Summary: When choosing an electric control valve, if the leakage requirement is strict, a single-seat valve can be selected; if the pressure difference is large and the flow capacity requirement is high, a double-seat valve or a sleeve valve can be chosen. The professional technical accumulation of W&T in high-temperature, high-pressure and harsh working conditions provides a reliable imported quality option for complex industrial scenarios.