... Condition:1)Refrigerant side (Between the tube and shell):R22,R134a,R404a,R407c,R410a,R600a,etc. Max ... working pressure is 50 Bar.2)Water side (inside of the tube):Domestic water,tap water,antifreeze (glycol ... is a important cause of high efficiency.2)Inside the tube is screw thread,so the water ... between the gas and water.Safety:1)Whole tube inside shell has no internal joint,that means no welding ...