... tubes in one cycle Vertical expanding machine is special equipment for expanding heat exchange tubes and the cooling fins of the finned ... solder for the welding junction. Gneral Expander Main technical ModeYZL-vertical expanderspecificationdiameter,mm7,7.94,9.52thickness,mm12.7,19.05 ... oil ISOVG22-32Note: The technical parameter according to the contract Vertical Expander Machine