| 摘要 |
PURPOSE:To surely inhibit any leak by disposing valve guides given constantly effective resilient force by which the guides are pressed to approach each other, between the respective seal faces of respective resilient valve seats and related value boards. CONSTITUTION:When a valve body 6 constituting of valve boards 61 and 62 is forced between the opposed seal faces 71 of a valve seat 7, a coned disc spring 12 is compressed so that the valve boards 61 and 62 constantly make close contact with the seal faces 71 of the valve seat 7 by the compressing force. Valve guides 171 and 172 are pressed by a pair of coned disc springs 18 to the valve boards 61 and 62. Because of the existance of coned disc springs 20, both the valve guides 171 and 172 are forced out from the opposed seal faces 71 of the valve seat 7 in the absence of the valve body 6. When the valve boards 61 and 62 are forced between the valve guides 171 and 172, two valve guides 171 and 172 are moved to the seal face 71 of the valve seat 7 to compress the coned disc spring 20.
|
