Flow passage coupling unit

摘要

A flow passage coupling unit is provided for connection and disconnection of pipings e.g. on a tooling die exchanger of a press or a former machine, in which both the cylindrical body and the valve head of a slide valve actuated for communication and discommunication between flow paths are slidably fitted into the small and large diameter bores of a main body respectively which is designated as a housing for the slide valve, so that the sliding distance of the slide valve can be determined by summing up of the sliding lengths of their respective small and large diameter bores. Accordingly, the entire length of the main body is minimized and thus, the flow passage coupling unit will become compact in size while assuring consistent action in coupling the flow passages. Also, the flow passage coupling unit is further reduced in the overall size by improviding both the sealing arrangement in the sliding regions and the opening arrangement in the cylindrical body.