Main technical parameters of our 4-way reversing valve It diverts the direction of the refrigerant flow under the electromagnetism of the pilot valve to supply either heating in winter or cooling in summer to the conditioned place Capacity: 4kW Power: 3/4 to 1.5hp Internal leakage: less than 1,000ml/min Maximum operation pressure differential: 2.25mPa Refrigerants: R22, R407c, R134a, and R410a Connection at high-pressure side: 8.1mm Connection at low-pressure side: 9.65mm Minimum operation pressure differential: 0.25mPa