Flow control valve for reducing valve leakage

摘要: A flow control valve having a seating surface formed on element to contact seat when the is closed has shape of part hypothetical spherical center at supporting member. Therefore, distance from member kept constant, and can be seated periphery without gap, even if shaft inclined. Thus, leakage reduced. The supports connected movable in an axial direction shaft. aligned with seat. Movement radial prohibited. not displaced direction. Accordingly, displacement prevented. certainly seat,