| 摘要 |
The solenoid valve comprises a duct having an inlet opening and an outlet opening through which the fluid can pass substantially without changing direction, a valve seat within the duct, a closure member movable between a closure position and a fully-open position, and electromagnetic means for acting on the closure member in order to move it to any position between the closure position and the open position in dependence on an electrical control quantity.The electromagnet means comprise a core of ferromagnetic material, fixed firmly to the closure member and movable substantially along the same axis as the fluid, and a solenoid for generating a force on the ferromagnetic core along the same axis. A second closure member, movable along the same axis, may be provided in order to provide a solenoid valve with a double seal.The solenoid valve described is less bulky and expensive than known solenoid valves because it does not require a metal housing body.
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