The Colmono range of grout pumps have been market leaders for many years and are available either as dedicated pumps as detailed below, or in combination with a colloidal mixer (see Colloidal Grout Mixer / Pump Units).
The pump is shown schematically in the diagram. Mixed grout is stored in the cylindrical tank and is kept agitated by paddles on the drive shaft. The same drive shaft also turns the rotor of the progressive cavity pump fitted below the tank. The control lever operates two valves permitting either recirculation or pumping to be achieved.