초록 ▼

A valve main body is internally formed with a main channel extending from a rear end face thereof nearly to a first valve actuator, and two subchannels communicating with the main channel via second and third valve actuators, respectively. The valve main body has a slanting face extending forwardly

A valve main body is internally formed with a main channel extending from a rear end face thereof nearly to a first valve actuator, and two subchannels communicating with the main channel via second and third valve actuators, respectively. The valve main body has a slanting face extending forwardly downward and having the first valve actuator mounted thereon.

대표청구항 ▼

[ What is claimed is:] [1.] A shutoff-opening device comprising:a valve main body formed as a generally rectangular parallelepiped having substantially parallel upper and lower surfaces joined at their opposite ends by front and rear end surfaces;said valve main body being formed internally with a m

[ What is claimed is:] [1.] A shutoff-opening device comprising:a valve main body formed as a generally rectangular parallelepiped having substantially parallel upper and lower surfaces joined at their opposite ends by front and rear end surfaces;said valve main body being formed internally with a main channel having an inlet opening disposed on said rear end surface of said valve main body or a rear end portion of the lower surface of said valve main body and extending along a straight line from said rear end surface toward said front end surface;a plurality of channel on-off actuators being mounted in side-by-side relation on mounting faces disposed longitudinally of said upper surface with central axes of said actuators being perpendicular to said mounting faces;a short channel extending from a seat of each actuator in axial alignment with a central axis thereof into communication with said main channel and cooperating with said main channel to form a dead volume when said actuators are in a closed condition; andsaid upper surface of said valve main body at the front end thereof having a front end valve actuator mounting face slanting forwardly downward, whereby the cumulative length of said short channel and said main channel extending to said front end valve actuator and forming a dead volume is less than the dead volume were said front end valve actuator disposed with its axis parallel to that of an adjacent valve actuator.