Siemens 658-0051 1/2" LINE SIZE, 2.5 CV, SEQUENCE, EQUAL PERCENTAGE, TWO INLETS AND ONE OUTLETSiemens 658 0051 1 2" Line Size, 2. 5 Cv, Sequence, Equal Percentage, Two Inlets and One Outlet This Powertop Sequence Valve is designed to select and modulate the flow of either hot or chilled water, without mixing, for radiant panel and similar applications. This valve is designed with two inlets and one outlet, is 1 2" in size, has a flow rate of 2. 5 Cv and an equal percentage flow characteristic. Other features of this valve include a durable