The VSI Waterworks CVI Swing Check Valve was designed for use on water or sewage pumping installations. The valve features heavy iron construction that is fully rebuildable without removing the valve from the line. The entire disc is replaceable simply by removing the sealed cover. The body is full ported, equal to the nominal line size. Available with air or oil cushion to prevent slam and water hammer as well as limit switches to indicate opening. Valves in this line are designed and constructed to meet and exceed AWWA C508.