These are soap water pumps (Coolant Pumps).

Application:
Soapy water pumps are mainly used in machining, turning, milling and grinding industries to transfer cooling and lubricating liquids such as soapy water or oil to the cutting place or workpiece.

Main functions:

Cooling: Reducing the temperature of the cutting tool and the workpiece to prevent damage caused by high heat.
Lubrication: Reducing friction and wear between the tool and the workpiece, which helps to increase the life of the tool and improve the surface quality of the part.
Washing: Washing shavings and small particles from the workpiece and tools.

Types:

These pumps are produced in single-phase and three-phase types with different capacities and flow rates.