... a large capacity, it is the best heavy oil pump. Double jacket model has the function of heat preservation, clients ... to control the temperature. It is an ideal heavy oil pump. Working Principle:Three Screw (One main, two driven screws ... position:HorizontalCasing/Inner parts material:Cast iron, Stainless Steel/Cast iron, Stainless steel, BronzeShaft seal type:Mechanical sealFree passage:00 mmMaximum ...