| 摘要 |
A bellows type pressure responding valve having a sealed bellows (66) as a pressure sensing element and adapted to change a valve opening by transmitting the expansion/contraction of the bellows (66) to a valve disc (61) via a valve stem (65) supported by a valve housing (51) movably in a valve lift direction, wherein a spherical joint structure consisting of a ball (77) disposed coaxially with the valve stem (65) and a spherical recess (78) formed at the bellows center position of a closing end face (67a) at the bellows body (67) of the bellows (66) is assembled into a connection between the bellows (66) and the stem (65) to spherically connect the bellows (66) with the stem (65) by the spherical joint structure, thereby delivering an automatic centripetal action between the bellows and the stem to provide high-accuracy valve control characteristics. <IMAGE> |
