Monday, October 17, 2011

What is NAMUR Solenoid Valve?


       The solenoid valve is an electromechanical valve for use with liquid or gas. The valve is controlled by an electric current through a solenoid: in the case of a two-port valve the flow is switched on or off; in the case of a three-port valve, the outflow is switched between the two outlet ports. Designed for direct mounting in any position on NAMUR interface, the NAMUR soenoid valve has anodized aluminum body, stainless steel spool, and brass internal parts. Spring return allows fail-safe operation in case of power loss, and screened exhaust nut protects valve function during outdoor use. Multiple solenoid valves can be placed together on a valve manifold.
       Solenoid valves are the most frequently used control elements in fluidics. Their tasks are to shut off, release, dose, distribute or mix fluids. They are found in many application areas. Solenoids offer fast and safe switching, high reliability, long service life, good medium compatibility of the materials used, low control power and compact design. A solenoid valve has two main parts: the solenoid and the valve. The solenoid converts electrical energy into mechanical energy which, in turn, opens or closes the valve mechanically. A direct acting valve has only a small flow circuit, shown within section E of this diagram (this section is mentioned below as a pilot valve). This diaphragm piloted valve multiplies this small flow by using it to control the flow through a much larger orifice.
       The NAMUR Solenoid valve is used in fluid power pneumatic and hydraulic systems so as to control cylinders, fluid power motors or larger industrial valves. Automatic irrigation sprinkler systems also use solenoid valves with an automatic controller. Domestic washing machines and dishwashers use solenoid valves to control water entry to the machine. In the paintball industry, solenoid valves are usually referred to simply as "solenoids." Solenoid valves are used in dental chairs to control air flow. In the industry, "solenoid" may also refer to an electromechanical solenoid commonly used to actuate a sear.

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