Solenoid valve is an industrial equipment controlled by electromagnetism, is used to control the fluid automation basic components, belongs to the actuator, and is not limited to hydraulic, pneumatic. Used in industrial control systems to adjust the direction of the medium, flow, speed and other parameters.
The correct selection of various control valves is one of the important aspects of pneumatic control system design. A reasonable choice can simplify the line, reduce the variety and number of valves, ensure the accuracy and reliability of the pneumatic system, reduce the consumption of compressed air and reduce costs.
So how to select? What principles should be followed when selecting it?
Select solenoid valves according to fluid parameters:
1.Corrosive Media
For corrosive media, corrosion-resistant PTFE solenoid valves should be used.
It not only can be corrosion-resistant, but also can be applied to strong acids, strong alkalis, strong oxidizers or strong corrosive media, these media will not have any impact on the solenoid valve, not to mention any chemical reaction with the solenoid valve.
It is very stable, almost not subject to any fluid and organic solvent erosion. At the same time, the internal closure is perfect, not easily invaded by corrosive fluids, but also can do zero leakage.
2. Edible Media
For the media need food-grade processing, it is appropriate to use food-grade stainless steel solenoid valve. Food grade solenoid valve has high manufacturing standards, it is mainly developed for some biological fermentation enterprises, there are particularly high requirements for the smoothness of the valve flow channel.
Food-grade solenoid valves and media contact parts are mostly made of stainless steel, the material is generally 304SS or 316 stainless steel, that is, non-toxic and harmless, clean and smooth surface will not produce corrosion and shedding of materials, production and processing is completed after special treatment.
In many aspects are industrial valves can not be compared, such as cleanliness, simple installation, etc., is the food, pharmaceutical and other industries manufacturing valves.
3.High-temperature Media
When dealing with high-temperature media, high temperature solenoid valve should be used. Features: high temperature resistance, the use of metal hard seal, improve the use of temperature.
Spool are stainless piston type, piston ring with special temperature-resistant, wear-resistant materials; piston and metal valve cavity does not produce direct friction, the valve body installation direction without restrictions; special coil, and the use of heat dissipation structure, so it is not easy to burn.COVNA can even does 230 ℃.
According to the working environment used:
1.Reliability
Solenoid valve is divided into two kinds of normally closed and normally open; generally choose normally closed type, power on to open, power off to close.
But in the opening time is very long when the closing time is very short to choose the normally open type. Solenoid valve with timer is often more convenient and faster.Solenoid valve with timer can control medium flow more precisely.
2.Safety
Ordinary solenoid valve is not waterproof. If the situation does not allow, should choose waterproof solenoid valve, can be customized according to customer requirements. The highest level of protection is IP68 waterproof solenoid valve, widely used in water fountain solenoid valve.
3.High pressure
In some work environment requires a larger pressure, often to choose is a high pressure solenoid valve can meet the demand. High pressure solenoid valve it is made of special stainless steel valve body, can withstand the huge medium pressure through, COVNA can go up to 450 Bar of high pressure valve body.Commonly used in cleaning equipment and sprinkler systems, etc.
4.Explosion-proof
In the application of flammable fluids, explosion-proof solenoid valve should be selected. Explosion-proof solenoid valve is a coil placed in a metal housing. When the equipment is in normal operation, the parts that can generate sparks are put into the explosion-proof housing so that the explosion-proof housing can withstand the internal explosion pressure without causing damage.
It also ensures that the internal flame gas will drop energy when propagating through the gap, which is not enough to detonate the gas outside the shell. Mainly used for piping media flammable and explosive, such as oxygen, hydrogen, etc. Or the external environment is flammable and explosive also need to use explosion-proof solenoid valve.
Conclusion
Solenoid valves are used in a variety of applications. One of the advantages of solenoid valves over conventional valves is the fast response time. The advantage of solenoid valves over electric and regulating valves is that the system is simple, easy to operate and inexpensive.
When selecting a solenoid valve, you can’t go wrong with COVNA valves, a professional manufacturer of solenoid valves, electric valves, pneumatic valves and regulating valves for over twenty-two years.
In different engineering applications, COVNA can always provide you with satisfactory automation solutions in industries such as water treatment, food and beverage processing, HVAC and petroleum.
Contact us for more solenoid valve solutions!
Post time: Feb-03-2023