Introduction
Solenoid valves serve as an actuator, providing the ability to remotely control, regulate, and direct the flow of specified gases and liquids. The solenoid valves are used in many industries such as water and wastewater, pneumatic system, hydraulic system, medical devices, manufacturing, petrochemical, and food and beverage.
There are several types of solenoid valves, and the choice of which to use depends on the media type and applications. The different types of solenoid valves include: diaphragm, globe, pilot operated, and check valves.
Diaphragm Valves
Diaphragm solenoid valves have the simplest design among the types of solenoid valves. Getting their name from their distinctive diaphragm-shaped moving part, these valves offer excellent flow control accuracy and strong air-tight seal. They are used for switching gases and liquids, including corrosive media and slurries. Operating with 24 VDC, 120 VAC (US) or 240 VAC (Europe), diaphragm valves require a low operating force and provide low power consumption.
Globe Valves
Globe solenoid valves are designed to allow for rapid opening and closing. They are available for a variety of process media, including acidic, abrasive, buoyant, corrosive, flammable, toxic, water and steam. Globe valves also protect against pressure or temperature surges, liquid hammer, and system failure. These valves are often used in industrial processes like food and beverage, pharmaceutical, chemical and petrochemical processes.
Pilot Operated Valves
Pilot operated solenoid valves have additional components and structure, thus they are more complicated than the others. They are used when operating pressures exceed the limitations of a direct-acting solenoid valve. They provide reliable operation even with minimum air supply or with highly viscous fluids.
Check Valves
Check solenoid valves are used to prevent fluids or gases from flowing in an undesired direction. They are used in applications with dirt, slurry, and other corrosive media. Check valves also work as shut-off valves to prevent backflow and leakage.
Conclusion
Solenoid valves are critical components used in many industrial applications. They are available in different types and must be selected based on the type of media and the application. Each type of solenoid valve has its own characteristics and benefits, making them suitable for different applications.
