... type9X-UR-HCL: Cooling/heat meter, low temperature type9X-UR-WH: Watermeter, high temperature type9X-UR-WL: Watermeter, low temperature ... Theoretically, the higher the water temperature is, the lower the dynamic viscosity is, and the less pressure loss is, vice versa.Note ... , the higher the water temperature is, the lower the dynamic viscosity is, and the less pressure loss is, vice versa.Heat ...