Abstract: A two way refrigerant control flow device for a heat pump system comprising a cylindrical body open at each end. Provided within the body are a plurality of first axial passages and a second axial passage disposed centrally in said body. The first axial passages are spaced radially outwardly from the second axial passage. Fixedly positioned in the second axial passage is an orifice of predetermined size. A thin annular washer-like valve member is disposed in the valve body and movable between a first position sealing the first axial passages to fluid flow while permitting flow through the second axial passage in one direction of fluid flow, and a second position away from the first axial passage to permit fluid flow through the first axial passage to bypass the second axial passage with flow in an opposite direction. In a preferred embodiment of the invention the orifice in the second axial passage is on the order of .040 inch to .120 inch.