| 摘要 |
A valve particularly useful for flushing a fluid line includes a spring-biased cylinder movable with respect to a fixed piston to control the discharge of flushing fluid through a housing outlet. The piston is fixed to the housing by a stem having a passageway in alignment with the housing outlet to thereby vent the interior of the cylinder to the atmosphere, and also to permit an instrument to be manually inserted through the housing outlet, the piston stem, and the piston, to engage the cylinder and to move it to its open position in order to manually flush the fluid line.
|
