The variation of the stroke length for the flow rate adjustment is manual. It is possible to modify the flow rate when the pump is either running or inactive.
The gearbox is a worm wheel type and helicoidal reduction system with all bearings supported within a fully lubricated gearbox.
The mechanism for the variation of the capacity is spring return based operated by an eccentric; this makes the diaphragm move forward (pushing phase) for all the stroke length, while the spring in continuous tension causes the comeback of the diaphragm (suction phase)
The variation of the stroke length for the flow rate adjustment is manual. It is possible to modify the flow rate when the pump is either running or inactive.
