... is used in huge manchines as evaporator Shell and tube heat exchanger for heat pump 1Shell and tube heat exchangercoaxial heat exchanger is ... for heat pumpWork Condition:1)Refrigerant side (Between the tube and shell):R22,R134a,R404a,R407c,R410a,R600a,etc. Max working pressure ... 4)The water pipe is on the lowest position ,and easy for drainage in cold season,avoid freeze. Shell and tube heat exchanger