Siemens 658-0050 3-Way Sequence and Changeover Valves,
This Powertop Sequence Valve is designe to select,
and modulate the flow of either hot or chilled water,
without mixing, for radiant panel and similar applications.
and This valve is designe with two inlets and one outlet,
and is 1/2″ in size, has a flow rate of 1.5 Cv and an equal percentage flow characteristic.
this Other features of this valve include a durable actuator made to eliminate electrolytic action,
a stainless steel stem and a large diaphragm area for control accuracy and tight close-off.