Highly efficient self priming Positive Displacement Sliding Vane Pumps for low to medium viscosity lubricating and non-lubricating liquids. Designed and precision built to optimise all the advantages of the Sliding Vane principle. Automatic compensation for vane wear assures the pump will maintain its superior priming characteristics and line stripping ability over a long service life. Smooth output flow ensure quiet operation within the NPSH range. The pumps can be direct-coupled to synchronous speed motors.