Solenoid Valve Manifolds A valve that is operated electromagnetically is called a solenoid valve. An electric current is used to control the valve through a solenoid. The flow is switched on or off in the case of a two-port valve. The outflow is switched between the two outlet ports in the case of a three-port valve. A manifold can be used to place multiple solenoid valves. Controlling the elements in fluids is the most common use for these valves. Their tasks are to mix, dose, shut off, distribute or release fluids. A wide variety of application areas use them. Solenoids are able to provide compact design, excellent medium compatibility of the materials that are used, good reliability, low control power, long service life and switching that is both safe and fast. The three types of actuators that are used are the rocker, pivoted-armature and the plunger. Operation Valve designs come in many variations. Both fluid paths and multiple ports can be found in ordinary valves. For example, two ports are found on a two-way valve. If the valve is closed, the ports become isolated. When the valve is open, both ports are connected, allowing fluid to travel between both of the ports. If the solenoid is not energized when the valve is open, the valve is called Normally Open (NO). It is called Normally Closed if the solenoid is not energized and the valve is closed. More complicated designs such as a three-way valve also exist. There are three ports on the three-way. One port is connected to both of the other ports. These are an exhaust port and a supply port. Materials Both the valve and the manifold must be constructed out of a material that is compatible with the particular fluid that will be flowing through them. The materials that are most commonly used are plastic, aluminum, stainless steel and brass. It is also critical for the seals to be compatible with the fluid. As a way of simplifying the issue of sealing the valve, the shading ring, core, plugnut and other various components are exposed to the fluid. This often creates some unique problems. In order to pass the field of the solenoid through to the core and the plugnut, it is necessary for the core tube to be non-magnetic. A material such as iron has excellent magnetic properties for the core and the plugnut. However, iron has problems with corrosion. Because stainless steel is available in both non-magnetic and magnetic varieties, it is a good alternative. Common Uses Valves and manifolds use solenoids in fluid powered hydraulic and pneumatic systems. They are used to control industrial valves, fluid power motors or cylinders. They are also used in automatic sprinkler systems along with an automatic controller. Dishwashers and washing machines use valves with solenoids to control the entrance of water into the machine. Dentists
use them to control the water and air flow in their instruments. Household water purifiers have also started to use these types of valves. If you are interested in finding out more about solenoid valve manifolds, visit Solenoid Solutions at solenoidsolutionsinc.com.