Metering Pump Valve Coupling for Accurate Pasty Media Dispensing

The connection between the two valve bodies is segmented into two distinct phases: an independent operation phase where each valve body functions separately to ensure optimal metering accuracy, and a coupled phase where the first valve body mechanically opens the second valve body to ensure reliable operation when pressure is insufficient or the medium is pasty. This segmentation allows the system to achieve both high metering precision and operational reliability under different conditions.

The first valve body performs a preliminary mechanical action on the second valve body by directly opening it when the medium becomes pasty or air is trapped, before pressure buildup becomes insufficient. This preliminary mechanical assistance ensures that the delivery valve opens reliably even when the medium properties or trapped air would normally prevent adequate pressure generation, thereby maintaining both air expulsion capability and metering accuracy.

The first valve body serves the second valve body by mechanically opening it when the dispensing valve dries up after prolonged standstill. The system uses its own internal components (the first valve body) to assist the failure-prone component (second valve body) without requiring external intervention, thereby maintaining reliable operation even after extended periods of inactivity when the medium has thickened or dried.