... domestic solar water heater system11.Ideal for commercial solar water heating applications.Heat pipe solar collector work principle 1.The ... pressure,4Mpa,welding pressure 4MpaDust Ring GasketSilicon Rubber Vacuum Tubetri-element tube,High boron and silicon content 3.3,Structure, ... Loading Quantity(set)20102787763574022116916613613040HQ278213209172171Price(USD) Solar collector project floor heating