plunger valve / vacuum / normally closed
These valves are made out of an anodized aluminum body, a steel pin that is joined with a tapered shade and by a push spring. It is connected with vacuum, and are normally shut.
They trigger suction to create vacuum, when the pin is actuated by the cams or any mechanical gadget. They might be utilized as an option to plunger valves when these can't be gathered onto the vacuum cups