Why doesn t the motor of an electric two way valve burn out?

Here are some of the well-known brands recognized in the electric two-way valve (electric two-way valve) industry, which are widely recognized and have a great 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 are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only: Suzhou Neway Valve Co., Ltd., Shanghai Guanlong Valve Machinery, Shanghai Qizhong Valve Manufacturing, 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.

There's a limit switch, but the washing machine doesn't.

The function of the electric two-way valve is to change the temperature of the medium.

The electric two-way valve consists of a temperature sensor, a proportional integral temperature controller and an electric control valve, which is a temperature control system for air supply and a temperature sensor installed in the return pipe.

The detected temperature signal is transmitted to the temperature controller, and the temperature controller continuously compares the detected value of the temperature sensor with the set value, and continuously outputs the signal at the same time, and controls the opening connection of the electric control valve to be adjusted, so that the ambient temperature measured by the temperature sensor is kept within the set temperature range.

1. The air pressure differential switch is used to detect the air permeability of the filter, the dirtier the filter, the lower the air permeability, and the greater the pressure difference on both sides. When the differential pressure exceeds the set value of the differential pressure switch, the micro switch operates and sends out an alarm signal.

2. The driver is driven by a single hysteresis synchronous motor, the valve spring is reset, and the valve is in a normally closed state when it is not working.

3. Open the valve, chilled water or hot water enters the fan coil unit to provide cold air or heating for the room, when the room temperature reaches the set value of the thermostat, the thermostat makes the electric valve power off, and the return spring closes the valve, so as to cut off the water flow into the fan coil unit, and closes and opens through the valve, so that the room temperature is always kept within the temperature range set by the temperature control.

4. The driver of the electric valve and the valve are connected in a threaded way, and the driver can be installed after the valve is installed. On-site assembly, flexible and convenient wiring. The flat design of the driver can be installed close to the wall, which occupies a small space, the product is reliable and durable, the working noise is low, and it can work reliably in the high temperature and high humidity environment that often occurs in the concealed fan coil unit.

5. When the temperature behind the coil is lower than a certain limit, the low temperature protection differential pressure switch cuts off the power supply of the blower, so that the fresh air damper is closed, preventing the water in the coil from freezing and cracking the coil.

6. It is used to control the opening or closing of the pipeline of the cold water or hot water air-conditioning system to achieve the purpose of controlling the room temperature.

The oil or gas circuit is switched on and off by electric control.

According to the signal transmitted by the thermostat, the opening and closing of the electric valve is controlled, so as to achieve the purpose of controlling the indoor temperature.

The pneumatic path is switched on and off by electric control. Shandong Yuhong automatic control valve.

The electric two-way valve is driven by the motor to drive the valve stem to drive the valve core action, and the electric two-way valve is divided into (shut-off valve) and regulating valve. The shut-off valve is a two-position operation, that is, fully open and fully closed, and the regulating valve is to install an electric valve positioner on it, and the valve is dynamically stabilized in a position through closed-loop adjustment. The electromagnetic two-way valve is a magnetic attraction after the electromagnetic coil is energized, and the pressure of the spring is overcome to drive the valve core to move, which is an electromagnetic coil, which is simple in structure and cheap, and can only realize the switch; Uses of electric two-way valve and solenoid two-way valve:

Solenoid two-way valve: used for on-off control of liquid and gas pipelines, it is two-position DO control. It is generally used for the control of small pipes.

Electric two-way valve: It is used for the analog adjustment of the flow rate of the pipeline medium in the liquid, gas and wind system, and is controlled by AI. In the control of large valves and wind systems, electric valves can also be used for two-position switch control.

Solenoid two-way valve: it can only be used as a switch, it is DO control, it can only be used for small pipeline control, it is common in DN50 and below pipelines, and there are very few above. Electric two-way valve:

There can be AI feedback signals, which can be controlled by DO or AO, which can be seen in large pipes and dampers, etc. 1.Switch form:

The solenoid two-way valve is driven by a coil and can only be opened or closed, and the action time is short when opening and closing. The drive of the electric two-way valve is generally driven by a motor, and it takes a certain amount of time to simulate the opening or closing action, which can be adjusted. 2.

Nature of work: The general flow coefficient of the electromagnetic two-way valve is very small, and the working pressure difference is very small. For example, the flow coefficient of a 25-caliber solenoid two-way valve is much smaller than that of a 15-caliber electric ball valve.

The solenoid two-way valve is driven by a solenoid coil, which is more easily damaged by voltage shock. It is equivalent to the role of the switch, which is the two functions of opening and closing. The electric two-way valve is generally driven by a motor, which is more resistant to voltage shock.

The solenoid two-way valve is quick to open and fast to close, and is generally used in places with small flow and small pressure, and requires a large switching frequency. The opening of the electric two-way valve can be controlled, and the state is open, closed, half-open and half-closed, which can control the flow of the medium in the pipeline and the solenoid valve can not meet this requirement. The electromagnetic two-way valve can be reset when the power is off, and the electric two-way valve needs to add a reset device to such a function.

3.Applicable process: solenoid two-way valve is suitable for some special process requirements, such as leakage, special fluid medium, etc., which is more expensive.

Electric two-way valves are generally used for adjustment, but also have a switching amount, such as the end of a fan coil unit.

The principle of the two-way valve is that there are two positions, one is open and the other is closed. It is usually used in hydraulic systems. I didn't see the electric two-way valve, and from the name it should be the rotation of the motor to open or close the valve. I don't know what you're using it for?

1, Your electric two-way valve specifications are metric.

2. Your pipes are imperial.

3. These are two different criteria.

DN200mm carbon steel pipe outer diameter should be 204

The electric two-way valve specifications are metric and the pipes are imperial. These are two different criteria.

DN200mm carbon steel pipe outer diameter should be 204

That's because the specifications of the electric two-way valve are metric, and the air conditioning water pipe is inchal.

These are two standards, hehe.

See if your host has a flow switch, if there is (generally there will be) it is best not to install a two-way valve partially, so as to ensure the water flow, otherwise the machine will alarm and prompt that the water flow is insufficient.

McQuay's main engine has a water flow switch, which comes with the machine itself.

The installation method said by the landlord should be from these aspects to see the size of the impact, one: the indoor use of this system is not used as soon as you go to work, and the number of coils used is greater than the total number of coils 1 3, in this case you should install a two-way valve, so as to achieve the purpose of energy saving. Second, the design of this system is to control the indoor temperature according to the air volume or the amount of water, if it is the air volume control, a three-speed switch should be installed, and at the same time, a two-way valve can be partially installed, which can ensure the normal operation of the system and is more energy-saving; If the water volume is controlled, it is necessary to install a two-way valve, and control the opening of the two-way valve through the temperature control switch, so as to send out hot and cold air, which is generally used in large shopping malls or places where coils are frequently used.

The landlord can look at your system according to these two aspects, the safety is to save energy, but can not affect the water flow of the host.

The fan coil unit usually needs to be equipped with an electric two-way valve at the return water (lower supply and upper return) position, which is controlled by the control panel installed on the indoor wall to achieve the purpose of controlling the cooling output of the fan plate. Therefore, it is necessary to install an electric two-way valve (unless the indoor temperature regulation is not required), but often the fan pan manufacturer will not have an electric two-way valve in their products, but will reflect it in the building automation (BAS) drawings.

It is also possible not to install a two-way valve, but it is not energy-saving, in refrigeration mode; Because cold water is supplied all the time, when the room temperature reaches the set temperature, if a two-way valve is installed, the valve will be turned off! That is, the cold water is turned off, if no two-way valve is installed, the thermostat should be set to save energy, that is: when the room temperature reaches the set temperature, the fan will automatically stop.

It's better that way!

Specifically, depending on the requirements of the design for temperature accuracy, some are designed in this way to save the differential pressure controller.

**The electric two-way valve for air conditioners is generally used to control the fan coil unit.

During refrigeration, the consequences of not installing an electric two-way valve in the fan coil unit are:

1. When the fan coil unit is not working, the chilled water flows in the coil to produce low dry temperature condensate (at this time, the condensate temperature can reach 8 to 9 degrees. The normal chilled water feed temperature is 7 degrees, and the condensate temperature in the fan coil unit condensate tray is about 16 degrees. Because the condensate tray is insulated at about 13 degrees, the thickness of the insulation layer cannot reach 9 degrees Celsius, which will lead to a large amount of condensation droplets outside the insulation layer of the condensate tray to the ceiling.

Dripping water underneath, destroying smallpox.

2. In addition, the chilled water flows through the fan coil unit that does not work, which will also cause additional pipeline loss and reduce the air conditioning system.

The refrigeration efficiency wastes electricity and also has a negative impact on the chilled water distribution of the system.

If you don't install it, the air outlet will condense when it cools down in summer!

There is no need for a water machine, and a fluorine machine must be installed.

The non-installation of multiple connections will waste cooling capacity.

There is no difference that it is all straight-stroke.

All electric two-way valves are controlled in parallel. This will cause the switch to be abnormal. Electric two-way valves are generally synchronous AC motors, which means that these motor coils form a parallel circuit, which will definitely affect each other. It can't be connected like this.

Only one of the temperature controls cannot be used simultaneously on two fan coil units at the same time, so one of them will have an up and down switch.

It should be that there is a problem with the drive of the valve body. Power up the drive separately and try it out.

There is also whether the current and voltage to the driver are reasonable.

One temperature control panel to control multiple fan coil voltage is not enough, measure the voltage.

If it doesn't work, you can ask the manufacturer to come and check the valve.

If you really can't do it, let the valve always open.