How to install a pneumatic solenoid valve
I. Working Principle of Pneumatic Solenoid Valve
There is a sealed cavity inside the pneumatic solenoid valve, with through holes opened at different positions. Each hole of the pneumatic solenoid valve leads to a different air pipe. In the middle of the cavity is the valve, and on both sides are two electromagnets. When the coil of one of the magnets is energized, the valve body will be attracted to that side.
The pneumatic solenoid valve blocks or leaks different exhaust holes by controlling the movement of the valve body. The intake hole is always open, and high-pressure gas will enter different exhaust pipes. Then, the air pressure of the pneumatic solenoid valve pushes the piston of the cylinder. In this way, the mechanical movement of the entire solenoid valve is controlled by controlling the current of the electromagnet of the pneumatic solenoid valve.
Ii. How to install pneumatic solenoid valves
1. For the installation of solenoid valve products, it is first necessary to ensure that the working range conditions of the pneumatic solenoid valve products are consistent with the actual working site conditions. Do not force the installation of solenoid valve products that exceed their working range; otherwise, it is easy to cause damage to the solenoid valve and unexpected situations. The main working conditions that need attention include the power supply voltage and pressure range at the workplace, the pressure difference range, the properties of the medium, the environment, and the working temperature, etc. Different working environments have corresponding solenoid valve products. Users can choose the products that are suitable for their working environment. Do not force the installation of unsuitable solenoid valve models
2. When installing solenoid valve products, attention should be paid to the main components of the solenoid valve, the coil. The installation of the solenoid valve coil should be vertically installed on the pipeline, and the pipeline should be kept level with the ground. Otherwise, the solenoid valve products are very likely to malfunction during operation, such as being unable to work. However, to meet the requirements of special working environments, there are solenoid valve products that can be installed vertically. For specific models, users can consult the sales staff of Lidian Valve Industry.
3. As the working principle of some solenoid valve products is related to electromagnetism, they have relatively high requirements for the working environment, such as the cleanliness of the interior and pipelines. Therefore, when users actually install them, they need to wash and blow the pipelines and the interior to ensure their cleanliness and prevent impurities from affecting the normal operation of the solenoid valve products. In addition, to ensure that no foreign objects enter the solenoid valve products during operation, filter screens and filters need to be installed in the pipeline.
4. As solenoid valve products are often used in conjunction with fluid conveying equipment such as water pumps, water hammer phenomena may occur during actual operation. Therefore, when choosing pneumatic component solenoid valve products, users need to select solenoid valve products with water hammer resistance.
5. If the solenoid valve product needs to work for a long time, users should install a bypass during actual installation to facilitate maintenance when the solenoid valve product is working and malfunctions.
6. Except for vacuum pipelines and special circumstances, when installing general solenoid valve products, it is essential to pay attention to the installation direction of the solenoid valve. Generally, on the valve body of an electromagnetic valve, there is a marking similar to an arrow, one. This indicates the direction of medium transportation.
7. Normally open and normally closed solenoid valves cannot be used interchangeably. This will cause the solenoid valve coil to burn out and reduce the service life of the solenoid valve. Therefore, in actual use, users should not keep the solenoid valve powered on for a long time.
Iii. Operating Methods of Pneumatic Solenoid Valves
1. When operating the pneumatic valve, the opening and closing direction should always be clockwise to close.
2. As the pneumatic valves in the pipeline network are often manually opened and closed, the number of turns for opening and closing should not be too many. Even for large-diameter valves, it should be within 200 to 600 turns.
3. To facilitate the opening and closing operation by one person, under the working pressure of the pipeline, the maximum opening and closing torque should be 240N-m.
4. The opening and closing ends of the pneumatic valve should be a square tenon, with standardized dimensions and facing the ground, so that people can operate directly from the ground. Valves with wheels are not suitable for underground pipe networks.
5. Display panel for the opening and closing degree of pneumatic valves
① The scale lines for the opening and closing degree of pneumatic valves should be cast on the cover of the gearbox or the outer shell of the display panel after changing direction, all facing the ground. The scale lines should be brushed with fluorescent powder to make them conspicuous.
② Under good management conditions, the material of the indicator dial needle can be a stainless steel plate; otherwise, it should be a painted steel plate. Do not use an aluminum sheet to make it.
③ The indicator pin is conspicuous and firmly fixed. Once the opening and closing adjustment is accurate, it should be locked with rivets.
6. If the pneumatic valve is buried relatively deep and the distance between the operating mechanism and the display panel and the ground is 21.5 meters, an extension rod facility should be provided and fixed firmly to facilitate people's observation and operation from the ground. That is to say, the opening and closing operations of valves in the pipeline network should not be carried out in the well.
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