Pipe heat exchangers for swimming pool heat pump Inner tube is titanium tube, it could be used in sea water ... hole diameter, theroll diameter can put various compressors7) Specialized for heat pump8) Applications: condenser, evaporator, water-source heat pump ... is corrosion resistant, such as stainless steel, nickel alloy, titanium ortitanium alloy, the coaxial heat exchanger can be applied on marine ...