... temperature,antifreeze,vacuum insulation. 2.Copper heat pipe,Start up quickly,transfers heat quickly, low start-up temperature,low ... conductivity coefficient is small, so it can provide effective heat preservation 5.The outer tank is color steel plate,and ... anti-corrosion function. 6.Gravity assisted heat pipe, unilateral heat transfer,high efficiency,low heat loss. 7. work under pressure,withstand ...