POSITIVE DISPLACEMENT PUMP AND SUCTION VALVE MODULE THEREFOR

摘要

A device for pumping a fluid comprises a suction valve module (100), a discharge valve module (14), and a fluid flow passage (54) extend¬ ing between the suction valve module (100) and the discharge valve module (14). The suction valve module (100) includes a valve hous¬ ing block (102) having a fluid inlet (134) and a suction valve assembly (108) disposed within the valve housing block (102). The suction valve assembly (108) includes a moveable poppet element (170) configured to reciprocate along a suction valve axis (130) that is skewed relative to a central axis (135) of the fluid inlet (134). The valve housing block (102) has a through-bore (120) and a valve cage (104) disposed with¬ in the through-bore (120), wherein the fluid inlet (134) intersects the through-bore (120). The valve cage (104) has a closed end (144), an open end (146), a cylindrical side wall (140) extending from the open end (146) to the closed end (144), and an interior chamber (142) dis¬ posed within the side wall (140). The sidewall (140) includes a plu¬ rality of circumferentially-spaced apertures (148) extending radially therethrough configured to allow fluid to flow from the fluid inlet (13) into the interior chamber (142).