| 摘要 |
The element (A) has a body through which a fluid-flow conduit passes. A piston (120) has an active surface (122) in fluid contact with the conduit. The piston moves from an internal position to an external position. A spiral compression spring (140) is mounted in housing of the body situated outside a housing (64) of the piston. The housing of the element is fluidically isolated from the conduit. A transmission unit formed by a closed blocking ring (100), and a transmission rod is placed between the spring and the piston for returning the piston to the internal position. |
