Patent ID: 7644725

Claim:
A mixing valve in which a main passage through which one fluid passes is penetrated horizontally from an upstream side of a main body block to a downstream side of the main body block, and at least one subsidiary passage through which other fluids pass is connected to the main passage via an opening/closing valve portion to open/close a communicating opening with a diameter reduced portion as a pressure loss portion, and wherein a valve body of the opening/closing valve portion to open/close a communicating opening is disposed so as to face inside the main passage, and the at least one subsidiary passage is closed by the valve body of the opening/closing valve portion, and wherein a pressure sensor which detects a pressure of the fluid passing through the main passage is disposed in the main body block, and a pressure sensor which detects the other fluids is disposed on the upstream side of the diameter reduced portion of at least one subsidiary passage connecting to the main passage of the main body block.