... , 10-15 days for a 40ft container11. OEM,ODM offered.12. To serve Europe, America, Africa clients better, at work in Europe ... water flows in vacuum tube, it can avoid frost cracking or scaling which influence heat efficiency.3. Each individual tube can work ... Closed-loop systems require a expansion vessel, an expansion vessel has a vessel in which air is locked inside a bladder or diaphragm. It screws ...