Electric actuator in front or electric gate valve in front

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

What do you mean! The electric actuator is mounted on the valve.

Valve electric actuator refers to the machinery that uses electrical energy as the main energy** to drive the valve. Because it is a precision electrical component, it is generally required to have certain explosion-proof and protection level (waterproof and dustproof) requirements. How does a valve electric actuator work?

A valve electric actuator is basically a geared motor. Motors can have a variety of voltages and are the main torque generating component. To prevent thermal damage caused by overwork or excessive power consumption, valve electric actuator motors are usually equipped with thermal overload sensors embedded in the motor windings.

The sensor is connected in series with the power supply and turns on the circuit when the motor overheats and then turns off when the motor reaches a safe operating temperature. The motor consists of an armature, electrical windings, and a gear set. When power is supplied to the windings, a magnetic field is generated, causing the armature to rotate.

As long as there are windings energized, the armature will turn; When the power is cut off, the motor stops.

The standard end of the stroke limit switch, which is required for electric actuators, can handle this task. Valve electric actuators rely on a gear train that is directly connected to the motor to enhance the motor torque and determine the actuator's output speed.

1。Multi-turn electric actuator ** angle (360 degrees) is suitable for gate valves, globe valves, etc. The rotation of the output shaft of the electric actuator is greater than one week, that is, greater than 360 degrees, and it generally takes many turns to realize the opening and closing process control of the valve.

2。Partial rotary drive - When the drive transmits torque to the valve, the number of rotations of the output shaft is less than 1 turn. It is not necessary to be able to withstand thrust at all times. It is commonly used in ball valves, butterfly valves, etc.

The principle of operation of electric valvesElectric valves are usually connected by electric actuators and valves, and become electric valves after installation and commissioning. The electric valve uses electric energy as the power to connect the electric actuator to drive the valve, and realize the opening and closing and adjusting of the valve. So as to achieve the purpose of switching or adjusting the pipeline medium.

Solenoid valves are a type of electric valves; It is to use the magnetic field generated by the electromagnetic coil to pull the valve core, thereby changing the on-off of the valve body, the coil is powered off, and the valve core is returned by the pressure of the spring. Hazelnut Electromechanical.

Valve actuator selection tips.

How to choose the right valve motor? The following points can be used as an important basis.

1. Operating thrust: There are two main engine structures of the valve electric device: one is that the thrust plate is not configured and the torque is directly output; The other is to configure a thrust plate, and the output torque is converted into output thrust through the stem nut in the thrust plate.

2. Operating torque: The operating torque is the most important parameter for selecting the electric stool moving device of the valve, and the output torque of the electric device should be the times of the maximum operating torque of the valve.

3. The number of rotation turns of the output shaft: the number of rotation turns of the output shaft of the valve electric lead training brigade device is related to the nominal diameter of the valve, the pitch of the valve stem and the number of threaded heads, which should be calculated according to M = H Zs (M is the total number of rotation turns that the electric device should meet, H is the opening height of the valve, S is the thread pitch of the valve stem transmission, and Z is the number of threaded heads of the valve stem).

4. Output speed: If the opening and closing speed of the valve is too fast, it is easy to produce water hammer. Therefore, the appropriate opening and closing speed should be selected according to different use conditions.

5. Stem diameter: For multi-turn open-rod valves, if the maximum stem diameter allowed by the electric device cannot pass through the stem of the equipped valve, it cannot be assembled into an electric valve. Therefore, the inner diameter of the hollow output shaft of the actuator must be larger than the outer diameter of the stem of the open rod valve.

For the dark rod valve in the partial rotary valve and the multi-turn valve, although the passing problem of the valve stem diameter is not considered, the diameter of the valve stem and the size of the keyway should also be fully considered when selecting, so that it can work normally after assembly.

As we all know, electric actuators are mostly matched with valves and used in automatic control systems. There are many types of electric actuators, and they are different in the way of action, such as quarter-turn electric actuators are to output angular moment, while linear electric actuators are to output displacement thrust.

The type of electric actuator in the application of the system should be selected according to the working needs of the valve. The types of valves themselves are quite diverse, and the uses and working principles of various valves are also different, but generally speaking, valves are controlled by rotating the angle of the disc or lifting the valve plate to control the opening and closing or opening angle. The selection of electric actuators should be matched according to the opening and closing of the valve.

1. Multi-turn electric actuator.

The multi-turn electric actuator is also an electric actuator that outputs angular torque, and the difference between it and the angular collapse electric actuator is that its output shaft rotates more than 360 degrees. Multi-turn electric actuators are suitable for rotary valves that rotate multiple times to complete the opening and closing process, such as gate valves and globe valves. 2. Linear electric actuator.

Linear electric actuators output displacement thrust and are suitable for valve types used for disc lift control, such as single-seat control valves and double-seat control valves. 3. Quarter-turn electric actuator.

Quarter-turn electric actuators are used in conjunction with rotary valves. The output shaft of the quarter-turn electric actuator rotates less than one week, that is, 360 degrees, such as the rotation angle of butterfly valves, ball valves and plug valves is usually less than 90 degrees, and the rotation of the quarter-turn electric actuator at the position of 90 degrees can realize the opening and closing process of the valve. According to the installation interface method, quarter-turn electric actuators are divided into two types: direct-connected electric actuators and base crank electric actuators.

The output shaft of a direct-attached electric actuator is directly connected to the stem of the valve, while the base crank electric actuator is connected to the stem by a crank.

It is generally believed that the actuator is a device involved in PID adjustment, which can display the position feedback signal of the valve and help the operator understand the real-time status of the valve; The electric valve is generally fully open and closed, and there are also with a stop signal; There are also electric valves for two-position control.

The automatic control valve is composed of two parts: actuator and valve body. In the classification of automatic control, if it is divided according to the energy used (that is, the actuator used), it can be divided into electric automatic control valve (referred to as electric valve), pneumatic automatic control valve, hydraulic automatic control valve and hybrid automatic control valve. Electric valves use an electric actuator, so it can be considered that the electric actuator is a part of the electric valve.

Is there a difference between an electric valve and an electric actuator, see if you don't understand the structure of the electric valve: the electric valve is composed of a valve and an electric actuator, so the electric actuator is the electric part of the electric valve.

In fact, the term of the valve controller is called the positioner, which is the brain of the valve, collects the position signal through the feedback rod, processes the signal, and outputs the corresponding signal to the actuator, which is the hand of the valve, accepts the air pressure from the positioner, and then generates displacement, and controls the opening of the valve through displacement.

The electric device is a kind of pneumatic valve that is distinguished from the above, and the above is the slippery accessory of the pneumatic valve, and the positioner must have a gas source to work normally, but if the air source becomes electricity, then it is an electric valve, and it needs to be electrically actuated, and the electric actuator receives the electrical signal and outputs the electrical signal to make the valve displaced, unlike the pneumatic valve and the locator of the fierce door, which outputs air pressure.