A hydraulic cylinder moves a double effect piston. This piston divides the pump housing into two chambers. Each chamber has one inlet and one outlet connection. These connections allow entry and exit of large pieces which can be pumped without being damaged. Contact between hydraulic oil and the product is avoided as the pump's body and cylinder are separated.

The piston pump is very useful in food industry where pumping of delicate foodstuffs can be a problem. The unique design is very economic on spare parts and does not contaminate the product. Very high pressures can be achieved. The piston pump can be used in any industry where high pressure drops, high viscosity and maintaining product integrity is crucial. The use of clap valves allows pumping of whole fruit, diced fruit and vegetables.

The hydraulic cylinder is connected to a separate hydraulic power unit which gives the advantage that the pump can be located anywhere in the installation with the hydraulic power unit located remotely.

For low pressure applications a special version of the pump can be made available which works with a pneumatic piston. In this case the pump does not need a hydraulic power pack but cannot be connected directly to a compressed air system.

The piston pump is designed to operate in a wide range of applications due to the following features:

• It is able to pump products with particles (particulates) that are sensitive to shear stress (low shear rate).
• It is able to pump whole fruits and vegetables, slices and diced fruit.
• It has a hygienic design.
• It CIP cleans effectively.
• Standard design temperature: 120°C.
• It can work under vacuum.
• It can pump up to very high pressures (30 bar maximum).

Applications

• High viscosity fluids.
• Shear sensitive fluids.
• (Aseptic) food applications.
• Fluids with large particles.
• Industrial applications.

Materials

• Product wetted components: AISI 316L stainless steel.
• Non product wetted components: AISI 304 stainless steel.
• Cylinder: carbon steel anti corrosive coating.

Finishing.

• External surfaces polished.
• Internal sufaces (product wetted parts): roughness < 0,5 microns.