Dry pumps

Dry pumps are characterized by buildings outside the chambers of pumped liquid, and the medium is supplied to them with pipelines connected to a connector sucking in the pump body. Depending on the design, dry pump engines can be integrated with a hydraulic rotor on one shaft or disconnected through the clutch. Dry pump engines usually have housings partly open with heat sinks or special cooling rotors for a forced stream of the surrounding air engine. 

Their biggest advantage is the possibility of constant visual monitoring of engine operation and easy service access.