Mobile Hydraulics

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FG Hydraulic filters in concrete pumps

A concrete pump is used for conveying concrete.  These pumps are used  during the construction of buildings, bridges or barrages.  Concrete with a particle size up to 63 millimeter can be pumped. Concrete pumps are normally double piston pumps, which are operated hydraulically by oil pumps with electric and diesel engines.  The conveying pistons are connected hydraulically by drive cylinders and  operate in a push-pull arrangement.

One of Filtration Group Industrial’s customers is a manufacturer of concrete pumps. In addition, machines for conveying, distributing, preparing, temporarily storing and processing concrete, mortar and thick materials are produced.

Challenge

Concrete pumps work with high delivery pressures up to 130 bar at a flow rate up to 200 m³/h. The concrete pumps are operated hydraulically. For a trouble-free operation of the hydraulic system, the used oil must be free from particles in order to ensure a continuous and reliable operation of equipment. The FG filter components have therefore to achieve a defined cleanliness class for the hydraulic oil as well as defined dirt holding capacity (ß-value).

Technical data

  • High-pressure filter up to 400 bar and integrated cold-start valve up to 20 bar
  • Suction return-line filter in special customer design with various connections
  • Air breathers with integrated filling device for hydraulic tanks
  • Standard low pressure filters for inline filtration up to 25 bar

Solution statement

  • Filtration Group offers components for the protection of the working hydraulic
  • Filter concept to avoid that unfiltered oil goes into the system during cold start to prevent contamination and damage of sensitive components
  • Special housing design to fulfill extended lifetime and reliability requirements and space limitations
  • Implementation of an oil filling system with integrated air breather to ensure clean oil during tank filling process

Customer value

  • Highly efficient filter technology and expanded dirt holding capacity ensures continuous and reliable operation of equipment
  • Integrated bypass valve prevents contamination during cold start conditions of machines
  • Cost savings through integration of separate filters into one system
  • Optimized utilization of available space in machines
  • Continuous and reliable operation of the concrete pumps by extended life time of the filter elements

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