brand new Overview The AVDO range of automatic bypass valves can be used as either differential pressure controls or to provide a minimum flow through a system, many boiler manufacturers are now insisting that a bypass valve be fitted in all installations to ensure that the volume of water circulating through the boiler remains consistent, regardless of the load on the system. Easy to set, self acting flow controller Opens on rising differential pressure Setting range of 0.05 to 0.5 bar Improves system efficiency Maximum flow temperature is 100°C Maximum working pressure is 10 bar Straight design