The main material of this heat exchanger – copper because it has a very high thermal conductivity, ductility and corrosion resistance. Corrugated inner surface increases the thermal efficiency of the tube.
Ribbed heat exchangers are used primarily for heating drinking water or for heating of large tanks with water. They are used for different kinds of boilers and solar collectors (safety requirements to the heating system with flow to 110°C).
Spiral heat exchanger consists of seamless copper tube with integral ribs (GEWA-D) and solder fittings. Tested under pressure 28 bar.

Series | Heat exchanger area, m2 | Weight, kg | Dimensions, mm | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
a | b | c | d | e | f | D | Df1 | Df2 | Df3 | fl | |||
VPA WT-15 | 3,2 | 18 | 580 | 90 | 40 | 1" | 10 | 12 | 194 | 280 | 245 | 14 | 71 |
VPA WT-20 | 4,4 | 23 | 585 | 120 | 40 | 1¼" | 25 | 12 | 194 | 280 | 245 | 14 | 91 |
VPA WT-30 | 5,4 | 25 | 725 | 115 | 40 | 1¼" | 25 | 12 | 194 | 280 | 245 | 14 | 91 |