... , or a professional 2 port valve, two way valve, 2 way valve, 2 ball valve, 1 ball valve factory, Hotowell International is always ... by the terminal of common, open and close. By sampling and dealing with the site data, the thermostats send control ... (could be customized) >>Wiring Diagram >>Model Comparison Table Model Valve Valve Size Flux Value(KV) Zize Closing Pressure (MPa) Work Medium ...