... following types: 1, D Type: D Series pumps for distribution does not contain solid particles, the temperature below 80 in water or ... drainage purposes. 2, DF-type: DF Series pumps for distribution does not contain solid particles, the temperature is -20 ~ 105 corrosive liquids ... . 3, DY Model: DY series of pump used for delivery does not contain solid particles, the temperature is -20 ~ 105 , viscosity ...