The key point of difference in the design and manufacture of these motorised valves is that they are rated for use with solar heating systems, peaking at 150°C, or operating up to 120°C. Specifically, the internal ball used for closing and diverting is made of a material moresuited to cope with both the glycol fluids used in solar systems as well as the high temperatures experienced in normal operation.
The valves can be used in both heating and solar systems, and can be used to zone off additional storage tanks, for heat dumping circuits, and to control or divert in place of pumps. The 3 port valve diverter is also rated to a peak of 150ºC, or operating up to 120ºC and performs the function of a diverter valve in both heating and solar circuits. The valve, without electrical supply applied, allows flow from AB (the inletmiddle port) to outlet port B. When the motor is energised, the valve then switches, diverting the flow to port A. ln addition, a manual lever is built into the actuator to open the valve to all ports for maintenance, system filling or commissioning.