Electric control valve troubleshooting? The cause of the failure of the electric control valve

There are many phenomena of electric control valve barriers, and several common phenomena and treatment methods are cited

1. If the motor does not rotate, the valve does not operate, and the analysis is as follows:

1) The motor coil is burned out. The use environment is poor, the water ingress causes a short circuit or the motor rotor is stuck, and the motor coil is heated and burned out. The judgment method only needs to use a multimeter to measure the resistance between the positive, negative and neutral lines of the motor, the normal value is about l6o, if the deviation is too large or too small, it proves that the coil has burned out.

2) The split-phase capacitor fails or is broken down, the split-phase capacitor is broken, and the motor will not start, and it is easy to check the split-phase capacitance with a multimeter.

3) The two micro switches are not in proper position. When the regulating valve acts, when the stroke reaches zero point and full degree, the micro switch should be closed, so that the current will not flow through the motor, so as to achieve the purpose of protecting the motor, such as the micro switch is too open, so that the valve stem action has reached zero point or full degree, the micro switch can not be disconnected, and the current continues to pass through the motor. At this time, the motor can no longer rotate, which will make the motor stalled and burn out.

The solution is to move the microswitch position to match the stem travel position.

2. Analysis of the fuse as soon as the electric valve moves:

1) The insulation of the enameled wire of the motor coil is damaged, and the coil winding hits the shell and is short-circuited. The judgment method can be used to measure the winding resistance to the ground using the Nordic meter.

2) The split-phase capacitor capacity is too large. Sometimes the capacity of the split-phase capacitor is too large and the starting current is large, which will burn off the fuse, and the judgment method is to measure the current value of the AC current to choose.

3. As soon as the power is transmitted, the regulating valve is in the fully open or fully closed position. Here's why:

1.The feedback signal line and feedback coil are broken.

2.The control line on the microcomputer output control line or electric operator is broken.

3.The presence or absence of a power supply that provides a feedback line.

The above reasons can be found with a multimeter. If all are normal, check the voltage-current conversion circuit.

4. The valve is not stable

The reason is that the zero point is wrong, the killing mechanism is too loose, or the stabilizing potentiometer is damaged. The treatment method is to check the size of the zero point with a multimeter and whether the resistance of the stabilizing potentiometer is changed or damaged. Check the tightness of the brake mechanism.

Which is the best manufacturer of valves in Shanghai? There are many valve manufacturers in Shanghai, specifically which one is the best, in fact, it is very difficult, this depends on where you can evaluate it conveniently, each manufacturer produces different valve products, and the fields involved are also very different, for example, some are doing water systems, some are doing industrial systems, and industrial systems are divided into many fields, such as: electric power, chemical industry, petroleum, pharmaceuticals and many other fields.

Here is a brief introduction to a few companies, Shanghai Qizhong valve in the field of water system, Suzhou Neway valve, Shanghai Guanlong valve this unit is not bad, industrial valve field can also be.

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. Although the ranking may change due to time and market conditions, the following brands are generally considered to be one of the top brands in the valve industry: water system valves and industrial valves The following more influential first-line brands can be used as a reference, and the following are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only:

Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Suyan, 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.

There are foreign objects inside the control valve that jam the pipe, do not kill the valve or cause the loss of the valve port, etc., resulting in internal leakage. Due to the failure of the electric control valve in the control section. It is mainly because of various reasons such as the limit switch and over-torque switch of the electric control valve in the valve.

If the actuator is a double-acting actuator with a spring, and only a position retention valve is added to the attachment, then the actuator is said to have air off or air open. It's just that in the event of a failure, the retaining valve plays a role in keeping the valve position unchanged.

What is wrong with your electric control valve and how does it behave? It would be too broad to just ask questions that might arise. And you ask questions in the hope that others can help you solve the problem, not to raise a question to discuss, then it is better to post a post for everyone to discuss.

After the electric valve fails, it may be that the electric valve has poor contact and you need to replace it.

You can first see if there is a problem with your home's wiring, the door is not powered due to the laughter cave, and the remote control key is not electric, and then you can find a professional maintenance and repair personnel.

What are the faults of electric ball valves and how to eliminate them? Let's conduct a detailed analysis, if the analysis is helpful to you, please raise your noble hand, give the American Weidun VTON valve a thumbs up! The electric ball section trapper valve uses the electric actuator as the driving power, with the action of rotating 90°, and mainly uses the ruler to cut off, distribute and change the moving direction of the medium.