Multi-function Vacuum Tube Solar Collector Pressure Solar Collector / Solar water heater collector Collector Parameter ModelLigthingHeat pipeSupply hot20/40" container(m2)diameterlengthNo.water(L/D)LQ-VT-47/181.8Ø47mm1500mm18120155/378LQ 47/202.120135140/340LQ 47/242.624170121/296LQ 47/303.153021093/226LQ58/182.57Ø58mm1800mm1815090/220LQ 58/202.882017586/212LQ 58/243.42420075/183LQ58/304.23026062/151Features are as following: 1) Heat pipe ports provide simple plug in installation while still ensuring tight contact with the heat pipes of optimal heat transfer. Thermal heat conduction grease is applied to the heat pipes condenser prior to insertion to further enhance heat transfer. Given the high temperature that the manifold is exposed to, The expansion of the heat pipe condenser and “setting” of the heat conduction paste results in the heat pipe being firmly held in place. This ensures excellent heat transfer for the life of the solar collector, As the heat pipe is extremely reliable and durable ,There is no need to ever remove or replace the heat pipe ,Ever if change a solar tube. 2)The twin header pipes are molded to match the shape of the heat pipe ports in order to maximize contact area. In addition ,The heat pipe ports are brazed to the twin header pipes providing a direct metallic connection 3)The “Contoured ” header pipe design produces turbulent water flow enhancing heat transfer 4)Available in rear port or end port inlet/outlet configuration Case