DY560S double face mechanical seals can be discovered in many kind of pumps,such as,submersible pumps,sewage pumps,muddy pumps,waste water pumps and in the fluids with solid grains or participles or sands. please keep the temperature,the pressure and the shaft speed as follows:-20~100ºC, and ≤0.5Mpa and ≤ 8 m/Sec