Patent ID: 6945264

Claim:
A flow control valve module comprised of: a) a valve body having a bore extending therethrough, wherein the bore has an area; b) a first disc secured within the valve body, wherein the first disc i) occupies substantially the entire area of the bore and ii) has at least one aperture extending through the disc; c) a second disc adjacent to the first disc within the valve body, wherein the second disc i) occupies substantially the entire area of the bore, ii) is rotatable within the valve body about a central shaft, iii) has at least one aperture extending through the second disc, and iv) is rotatable to align the apertures of each disc an amount necessary to control fluid flow, and whereby the alignment always provides at least some fluid flow between the first disc and the second disc; d) a check valve within the valve body proximate to the first disc and second disc to close and prevent back flow; and e) wherein the check valve has a valve seating surface on the downstream face of the first disc and wherein the check valve is downstream of the first disc.