Principle and types of solenoid valve

History dating back solenoid valve, so far, at home and abroad from the principle of the electromagnetic valve is divided into three categories (ie: direct-acting type, straight moving step by step guide type), while the valve flap from the different structures and materials with the principle of distinction on the branches are divided into six sub-groups (direct-acting diaphragm structure, step by step straight action film structure, the pilot membrane structure, and straight-acting piston structure, step by step straight-acting piston structure, the pilot piston structure).

     Direct Drive Type Solenoid Valve:

     Principle: power, the electromagnetic coil of electromagnetic force to close the piece from the valve seat on the raised, the valve open; power, the electromagnetic force disappears, the spring pressure in the valve seat to close the cases, the valve closes.

     Features: In the vacuum, negative pressure, zero pressure when normal work, but the path is generally not more than 25mm.

     Distribution of Direct Drive Type Solenoid Valve:

     Principle: It is a direct-acting and pilot-style combination of theory, when the entrances and exits when there is no differential pressure, electricity, the electromagnetic force directly to the pilot valve and main valve off the small pieces in turn brought up, the valve to open. When the entrances and exits to start pressure, the electricity, the electromagnetic force pilot a small valve, main valve cavity under the pressure of increasing the cavity pressure drops, thus the use of upward pressure to open the main valve; power, the pilot valve with a spring or to medium pressure to promote off pieces, moving down, so that the valve closed.

     Features: In the zero-pressure or vacuum, high pressure can also be * when the action, but the power of a larger, which calls for horizontal mounting.

     Pilot solenoid valve:

     Principle: electricity, the electromagnetic force the pilot hole opens, the chamber pressure to drop rapidly to form the closure around the lower parts of high pressure, the fluid pressure to promote off pieces of upward movement, the valve open; power, the spring force to pilot hole closed, the inlet pressure chamber through the bypass hole quickly formed around the closed valves on the high-low under the pressure difference, the fluid pressure to promote off pieces of moving down, close the valve.

     Features: limit the scope of a high fluid pressure can be arbitrarily install (need to customize), but must meet the conditions of fluid pressure. ball valve Trunnion Mounted Ball Valve Floating Ball Valve Top Entry Ball Valve ball valve V Type Ball Valve
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