... water boiler heating system and urban transportation, iswr type temperature t ≤ 120 °C.For the delivery of solid particles, corrosive, ... synthetic fibers, using a temperature of -20 °C ~ +120 °C. For delivery of gasoline, kerosene, diesel and other ... flammable, explosive liquid, is transported medium temperature of -20 ~ +120 °C. Features smooth running: the absolute shaft concentricity and excellent ...