1. Injection Pvc moulds 2.Seamless titanium tube 3. Compact design 4. R22, R410a,R407c,R134a Heat pump heat exchangers are made of top quality titanium pipes using advance PVC plastics, with corrosion environmental protection.They are suited to the use by swimming pool, seafood markets, and electroplating, chemical and medical industries.Outward can be made of 3 kinds of material: PVC-U ,PP-R, ...