In a normally closed valve, the media then applies pressure to the top of the diaphragm, holding it in the closed position. Normally, there is a small orifice in the inlet port of the solenoid valve that allows some of the media to enter into a cavity on top of the diaphragm. The ‘pilot operated’ term refers to the media acting as a pilot to assist with the operation of the valve. Indirect Acting Solenoid Valves, also known as ‘pilot operated solenoid valves,’ are generally always of the diaphragm style solenoid valve type. Indirect Acting (pilot operated) Solenoid Valve This means that the valve can be fully operational without the need for any pressure in the line. One of the main functions of a direct acting solenoid is that they can operate fully with no pressure differential. It is important to note that this doesn’t necessarily mean that there is a connection between the core tube of the valve and the diaphragm, but there is a direct control as a result of the electrical state. For instance, if the valve is closed in its resting position (see ‘Normally Closed’ below), then energising the solenoid coil in a direct acting solenoid valve will move the diaphragm in to its open position. It means that by energising the solenoid coil, there is a direct influence on the position of the solenoid valve. In order to understand the range of functions available to you, MGA Controls have produced this quick-start guide, telling you everything you need to know regarding the types of solenoid valves.ĭirect acting is a term generally associated with diaphragm solenoid valves or solenoid poppet valves. The various functions of a solenoid valve depend on the type of valve you have, and the operation you need the valve to perform. Allow us to understand your problems and help you overcome them by recommending innovative, efficient and cost-effective solutions from our portfolio of World leading manufacturers.Ī wide range of solenoid valve types are available depending on your specific application requirements. Our team of technical experts are trained on the intricate details of our product offering, but also can also boast many years worth of industry and application experience.
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