This invention is principally concerned with improvements in CHECK VALVESfor fluid flow control at the discharge of a pump used to deliver a flow of fluid, such as water from an underground source or well. The pumping of water from the source is always subject to the entrainment of some sand or grit which is harmful to the moving parts of the pump. It is important with submerged pumps to provide a check valve at the pump discharge so that in non-pumping periods the fluid in the delivery line will not drain back through the pump. At the same time the check valve must be light weight for fast response and must be free operating.

Accordingly, it is a principal object of this invention to provide a Check Valves which has a simple structure for ease of assembly and for reduction of cost or repair should the operating components require attention. A presently preferred check valve assembly comprises a housing having a chamber formed with an apertured wall across one end and a pair of pockets in opposed relation on opposite sides of said chamber and spaced away from said aperture wall in the direction of flow through said chamber, support means mounted in said apertured wall, a check valve movably engaged with said support means and guided into a position closing said wall aperture, a guide pin projecting from said Check Valves into said chamber between said pair of pockets, a guide pin collar engaged on said guide pin, an elongated support means engaged by said collar and having opposite ends seated in said pockets, and a resilient element engaged on said check valve and on said collar and normally urging said check valve into the wall aperture closing position.

MORE NEW