... 1 for chemical liquid, oil, light, or heavy 2. for polyurethane, PU liquid 3. for ink chemical fluid transfer pump,high viscosity ... transfer pump for chemical liquid, oil, heavy visocosity liquid, PU liquid,paintin paint, oil, PU spraying etc, widely used in paint, oil ... , PU spraying, thermal insulating layer making etc* ratio: 2: 1, 3: ...