Double diaphragm pump having a spool valve

摘要

A double diaphragm pump having a spool valve. The spool valve includes a housing that has a first end, a second end, and at least one housing aperture defined therethrough from the first end to the second end of the housing. The spool valve also includes end plates positioned at the first and second ends of the housing. The end plates include at least one plate aperture defined therein that is aligned with the housing aperture. The spool valve further includes at least one stiffening and retaining rod inserted through the plate apertures and the housing.