Transferring thick, high viscosity ingredients such as tomato puree, pulps, creams and syrups, present no problems for Pump Engineering's range of CSF air-operated piston pumps. These are available in a long version for drum emptying where the piston is below the liquid level, and in a short version for bottom discharge vessels or wall-mounted applications. Depending on the model, a CSF unit will deliver pressures of up to 20bar and flow rates of up to 100 litres/min. The pumps are constructed from AISI 304 or 316 polished stainless steel, and offer a choice of PTFE or nitrile seals.