With highly viscous media, emptying a stirred vessel is often a problem that can no longer be solved with conventional pumps,
which can no longer be solved with conventional pumps. For such cases, container emptying devices are used that are specially adapted to the agitated medium. Examples are highly viscous adhesives, lubricants, ceramic masses, pastes, creams and sealants.
An ejector plunger is often the only practicable way to empty a stirred vessel almost residue-free. The material to be stirred leaves the vessel through a bottom valve or a riser pipe. The ram is fed hydraulically, electrically or pneumatically.