... ;life:15 year3.frame:aluminum alloy,thickness:2.0mm4.water tank:color steel plate thickness:0.5mm outertank,and inner ... pressure:6 bar5.workstation:circulation pump RS-15/6wilo,controller,expansion tank(italy)6.the insulating layer uses polyurethane bulk bubble and ... has a good effect of temperature preservation Model: tank capacity: 150L,200L,250L,300L,400L,500L,600L,700L,800L ...