HYBRID CHECK VALVE FOR PISTON PUMP, PISTON PUMP PROVIDED WITH SUCH A HYBRID CHECK VALVE, KIT FOR ASSEMBLING THE SAME, AND METHODS OF ASSEMBLING AND OPERATING ASSOCIATED THERETO

摘要

A hybrid check valve (9) for use with a port (7) of a piston pump (1) configured for pumping waste material (3) containing a mixture of at least liquid and solid materials (3a,3b), the hybrid check valve (9) being operable between opened and closed configurations for respectively allowing and preventing the passage of waste material (3) through said port (7). The hybrid check valve (9) includes a supporting component (11), a displacing component (13) for displacing the supporting component (11) between the opened and closed configurations, and an endoskeleton component (15) mountable onto the supporting component (11) and displaceable therewith via the displacing component (13). The hybrid check valve (9) further includes an exoskeleton component (17) mountable about the endoskeleton component (15), the exoskeleton component (17) having a peripheral outer surface (19) being provided with a tapered interface (21) configured for cooperating with a rim (23) of the port (7) for sealing the port (7) when the supporting component (11) is displaced into the closed configuration due to pumping pressure in the chamber (5), the tapered interface (21) being positioned, shaped and sized, and being made of a flexible material with memory, to resiliently deform itself about solid materials (3b) present between the rim (23) of the port (7) and the peripheral outer surface (19) of the exoskeleton component (17), so as to provide a compensatory seal thereinbetween, when the hybrid check valve (9) is operated in the closed configuration. Also disclosed is a piston pump (1) provided with such a hybrid check valve (9).