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Hose pumps SP 04

Range of application:

Hose pumps are suitable for delivering fluid and gaseous media, either for simple conveyance or for precise proportioning. The use of different hose materials allows for the delivery of different chemicals, abrasive materials, corrosive or sterile media. Hose pumps are used in laboratories, in analytical and medical systems, in biotechnology, in the food industry, as well as other industrial areas. Three models are available:

  • Integrated pumps
  • exterior pumps
  • laboratory pumps

Mode of operation:

Hose pumps operate without any valves or seals. They belong to the category of positive displacement pumps. The transported media is forced through a hose, which can be quickly exchanged and is therefore very economical. While transporting the medium, the hose is pinched together by spring-loaded compression rollers. Thus, the rotating movement pushes the medium from the suction side to the discharge side of the hose. Beyond every roller, the hose opens up again and thereby creates a vacuum. This in turn causes the medium to be drawn in.

The flow rate depends on the speed of the pump's rotor, the inner diameter of the hose, the elasticity of the hose, as well as the viscosity of the transported medium. The extent of the vacuum depends on the inside diameter, the wall thickness, and the elasticity of the hose. The pressure depends on the elasticity of the hose and the contact pressure of the compression rollers.

The pump rotor is equipped with two compression rollers and four guide rolls. The compression rollers are located opposite to each other, thereby sealing the hose, regardless of the pump rotor's orientation. The guide rolls ensure the hose will remain in a track, which is favourable for the compression rollers. Changing the hose is very easy and does not require any tools. Just loosen the knurled nut and remove it, including the screw, by pulling up. Remove the pump housing by pulling it downward and remove the hose sideways from its guide. Insert the replacement hose by following the same sequence in reversed order.



 SP 04 E
 SP 04 EG
 SP 04 G
 SP 04 L
 SP 04 AE
 SP 04 AG