| 摘要 |
A bellows valve comprises a first bellows (10a) connected to a first cap member (9) at one end and to a support member (11) at the other end, and a second bellows (10b) connected to a second cap member (12) at one end and to said support member (11) at the other end. Respective first and second bellows cavities (15a,b) are thus formed inside each bellows. An orifice (14) is arranged to fluidly interconnect the first and second bellows cavities, and a bellows-internal valve device (16) is arranged to selectively open and close the orifice (14). The bellows-internal valve device (16) comprises first and second resilient members (20a,b) arranged on respective first and second sides (11a,b) of the support member (11) and having respective portions being coupled to respective first and second holding members (18a,b) on the valve device (16). The invented bellows valve is useful in injection valves, such as gas lift valves. |
