Yonglida QSJ-II frequency modulated sand grinding and dispersing machine is a dual-function paint testing equipment with two functions of sand grinding and dispersing. It uses the high-speed rotating dispersing impeller to generate shear force to evenly disperse solid materials. in liquid. The QSJ-II frequency modulated sand grinding and dispersing machine has a motor power of 2200W and a maximum speed of 2200-2400 rpm.

| model | QSJ-III | QSJ-II | |
| electric motor | 750W 220V 50Hz | 550W 220V 50Hz | 2200W 220V 50Hz |
| Speed âârange | 0~6000r/min | 0~7500r/min | Up to 2200~2400r/min |
| Diameter of impeller | Φ50mm | Φ50mm | - |
| Dispersion barrel volume | 2L | 1.2L | - |
| Lifting stroke | 200mm | 200mm | - |