FESTO Festo solenoid valve is a key component in automation systems, used as an automation basic element for controlling fluids, and widely used in various industries. When choosing a solenoid valve, "pressure" and "no pressure" are important considerations. So, should we choose a pressurized solenoid valve or a non pressurized solenoid valve? This mainly depends on your specific application and needs.

1、 Choose based on pressure requirements

Pressure FESTO Festo solenoid valves are mainly used in medium and high pressure systems. These types of solenoid valves can withstand high pressure and have smaller leakage, ensuring the stability and safety of the system. If there is a medium to high pressure environment in your system, such as pressure tanks or pipelines, then pressure solenoid valves are undoubtedly a better choice.

In contrast, non pressure solenoid valves are mainly used in low-pressure or non pressure systems, such as drainage, sewage treatment, and automation systems in certain non pressure environments. This type of solenoid valve has a simpler structure and relatively lower cost.

2、 Select based on system type

The requirements for solenoid valves vary among different types of automation systems. For example, in solar hot water systems, irrigation systems, aquarium equipment, etc., non pressure solenoid valves are often used because the pressure of these systems is usually lower, and the cost of non pressure solenoid valves is lower, making them more suitable for large-scale use.

On the other hand, for pressurized systems such as pressurized water supply systems, industrial automatic control systems, etc., due to the need to withstand certain pressures, pressurized solenoid valves should be selected to ensure the safe operation of the system.

3、 Specific application example: Solar powered water tower system

In solar powered water tower systems, the control function of solenoid valves is particularly important. Solar systems with water towers are typically used to store hot water, and their operating pressure is relatively low. Therefore, in this situation, using a pressure free solenoid valve may be more appropriate.

However, if the water tower is designed with pressure storage function or connected to other medium and high pressure systems, pressure solenoid valves should be selected to ensure the safe and stable operation of the system.

In summary, the selection of pressurized or unpressurized FESTO solenoid valves should take into account the pressure requirements, types, and specific application scenarios of the system. For general solar water tower systems, if the operating pressure is not high, it is recommended to use pressure free solenoid valves; On the contrary, if the operating pressure of the system is high or connected to a medium high pressure system, a pressure solenoid valve should be selected. When making a purchase, it is also necessary to consider the actual needs and budget comprehensively in order to make a choice.

1、 Definition of pressure solenoid valve and non pressure solenoid valve

Pressure solenoid valve refers to a pressure difference greater than 0 between the two ends of its channel when the solenoid valve is in operation. In a pressure solenoid valve, after the electromagnet is engaged, the valve opens and the pressure difference causes the medium to flow through the valve. When the electromagnet loses power, the spring pushes the valve to close and the medium stops flowing.

In contrast, a pressure free solenoid valve refers to a system in which the pressure difference between the two ends of its channel is zero when it is in operation. The opening and closing of the pressure free solenoid valve is not affected by the medium pressure, but only controlled by the working state of the electromagnet.

2、 The difference between pressure solenoid valve and non pressure solenoid valve

1. Different application scenarios

Pressure solenoid valves are usually suitable for applications with high medium pressure, such as conveying liquids, gases, etc. Non pressure solenoid valves are suitable for applications with low or no medium pressure, such as air purification, air conditioning systems, etc.

2. Different working principles

The opening and closing of pressure solenoid valves are controlled by the pressure difference of the medium, while the opening and closing of non pressure solenoid valves are only controlled by the working state of the electromagnet.

3. Different advantages and disadvantages

The advantages of pressure FESTO Festo solenoid valve are stable operation, good sealing performance, and high flux; The disadvantage is that it requires a large pressure difference to work, and the electromagnet is prone to burning out. The advantage of a pressure free solenoid valve is that it can operate without a pressure difference, and the lifespan of the solenoid is relatively long; The disadvantage is that the flux is small and the viscosity requirement for the medium is high.

3、 Conclusion

There are certain differences between pressure solenoid valves and non pressure solenoid valves in terms of application scenarios, working principles, and advantages and disadvantages. When selecting solenoid valves, it is necessary to choose the appropriate type of solenoid valve based on specific usage scenarios and requirements.

1、 The distinction between pressurized and non pressurized solenoid valves

Electromagnetic valves are common components in automatic control systems. Depending on the working pressure, solenoid valves are divided into pressure solenoid valves and non pressure solenoid valves. These two types of solenoid valves have differences in their working principles and structures, making them suitable for different application scenarios.

1. Pressure solenoid valve: This type of solenoid valve is suitable for working environments with a certain pressure. When the coil is energized, electromagnetic force is generated to move the valve core, thereby changing the flow state of the medium. Pressure solenoid valves can withstand high pressures, ensuring reliable operation in high-pressure environments, and are widely used in hydraulic, pneumatic, and other systems.

2. Non pressure solenoid valve: Compared with pressure solenoid valve, non pressure solenoid valve is mainly suitable for low-pressure or non pressure working environment. Its working principle is also driven by electromagnetic force to move the valve core to control the flow of the medium, but due to differences in structural design and materials, non pressure solenoid valves may not work properly in high-pressure environments and may even be damaged. Therefore, when choosing a pressure free solenoid valve, it is necessary to ensure that the working environment pressure meets its usage requirements.

2、 Can a non pressure valve be used under pressure?

Before discussing this issue, we must first clarify a principle: the use of any device should follow its design specifications and applicable conditions to ensure safety and reliability. Therefore, the answer to the question of whether a non pressure valve can be used under pressure is: it is not recommended to use a non pressure solenoid valve under pressure.

1. Mismatched working pressure: The design pressure bearing capacity of non pressure solenoid valves is relatively low. If used in a pressurized environment, it may cause problems such as valve body deformation and seal failure, thereby affecting the normal operation of the entire system.

2. Safety hazards: Due to the fact that non pressure solenoid valves may not be able to withstand pressure in high-pressure environments, there are safety hazards such as bursting, which pose a threat to personnel and equipment.

3. Unstable performance: Even if a non pressure solenoid valve can work briefly in a pressurized environment under certain conditions, its performance will be greatly affected, such as slower response speed, reduced control accuracy, etc., which cannot meet the system requirements.

Therefore, in order to ensure the stability and safety of the system, it is recommended to choose the appropriate type of solenoid valve according to actual needs. After clarifying the working environment pressure, choose solenoid valve products with corresponding pressure bearing capacity.

3、 How to choose solenoid valve correctly

When choosing FESTO Festo solenoid valves, in addition to considering working pressure, the following factors need to be comprehensively considered:

1. Medium type: Select the appropriate solenoid valve material and structure based on the type of medium circulating in the system (such as gas, liquid, etc.).

2. Flow requirements: Select the appropriate solenoid valve diameter and flow coefficient based on the system's flow requirements.

3. FESTO Festo solenoid valve ensures that the electrical parameters (such as voltage, current, etc.) of the selected solenoid valve match the system power supply.

4. Environmental conditions: Consider factors such as temperature, humidity, and corrosiveness in the environment where the solenoid valve is located, and choose products with good weather resistance.

In summary, the correct selection and use of solenoid valves is a key step in ensuring the stable operation of automatic control systems. By understanding the characteristics and applicable conditions of different types of solenoid valves, as well as considering practical needs and environmental factors comprehensively, we can make wise choices to improve the overall performance and reliability of the system.