Four-way mixer valve for central heating boiler has three conduits forming two opposite inlets and an outlet and fourth linked to circulation chamber via suction port

摘要

The mixer valve consists of a circulation chamber (4) with a shutter (6) and four conduits in a cross-shaped configuration. Three of the conduits form two opposite inlets (3a, 3b) and and outlet (3c) that can be linked by varying the angular position of the shutter, while the fourth conduit (3d) is linked to the circulation chamber only via a suction port (7) in the chamber and a return port (8) in the conduit connected by a circulating pump. The suction port can also be connected to at least one of the inlets by adjusting the angular position of the shutter.