| 摘要 |
A flow control valve is provided to improve airtightness by inserting a blocking protrusion into a blocking groove at a control piston to supply fluid by the closing and opening. A flow control valve(100) includes a valve body unit(110), a control unit(120), and a supplying unit(130). A valve body(111) is formed on the valve body unit to introduce fluid, wherein an intake space(112) is formed on the valve body. A control connection unit(114) is formed on one side of the valve body and a supplying connection unit(115) is connected to the other side of the valve body. An operation unit(126) is coupled to the control connection unit of the valve body with an operation couple unit(127). An elastic material(125) is formed to maintain a sealing force by elasticity at a side of a piston rod. A piston sealing surface(122) is formed on the other side of the control piston(121). A supplying body(131) is formed on the supplying connection unit of the valve body unit to be coupled to a supplying connection unit(135). A mounting slop surface(133) is formed inside of the supplying body to receive the piston sealing surface of the control unit. The supplying unit is formed to block by minimizing a contact gap of the control piston received by forming one or more blocking grooves(134) on the mounting slop surface.
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