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Hydraulic test bench with CJC Fine Filter unit for oil contamination control.

Hydraulic Test Bench Filtration for a Global Pump Manufacturer

A global pump manufacturer faced contamination levels between NAS 8 and 13, exceeding acceptable precision testing limits. After three filtration systems failed to meet the required NAS 6 cleanliness standard, CJC® Fine Filter units delivered the oil cleanliness needed to support precision gear pump testing.

Case study written by:

Dennis Vestergaard

Application Snapshot

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Industry:

Industry - Hydraulic Manufacturer

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Country:

India

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Oil type:

250L - 700L Hydraulic Oil

Executive Summary

The global pump manufacturer operating several hydraulic test benches experienced contamination levels between NAS 8 and 13 (equal to ISO 19/17/14 and 24/20/17 according to ISO 4406), preventing the achievement of the cleanliness standards required for precision testing. Three alternative filtration systems had previously been evaluated but failed to meet the target of NAS level 6 (ISO 17/15/12) or below.


The objective was to reduce contamination levels and establish good oil cleanliness for reliable testing. CJC® Fine Filter units were installed and integrated into the existing test bench setup. By utilizing advanced depth filtration technology, the units significantly reduced contamination and supported precision testing requirements. As a result, hydraulic test bench quality outcomes were enhanced, and the customer plans to expand the use of CJC filtration technology across additional test benches.

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Improved oil cleanliness

Reduced contamination levels from NAS 8-13 (ISO 19/17/14 to 24/20/17) to the required cleanliness for precision testing at NAS 6 (ISO 17/15/12) or below.

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Reduced wear and component stress

Cleaner hydraulic oil helps minimize particle-related wear on test equipment and hydraulic components.

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Reliable test results

Ensured stable oil cleanliness conditions, supporting accurate and repeatable hydraulic pump performance testing.

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Easy integration

Designed for easy installation and compatibility with existing hydraulic test bench systems.

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Client brief

A leading global pump manufacturer required consistently clean hydraulic oil for gear pump testing. Existing filtration solutions were unable to maintain the cleanliness levels necessary for precision testing, creating challenges for quality assurance and operational efficiency.

Contaminated hydraulic oil with solid particles

Challenge

Faced contamination levels between NAS 8 and 13 (equal to ISO 19/17/14 and 24/20/17), exceeding acceptable precision testing limits. Tried three other filtration systems which failed to meet NAS cleanliness standards required for testing at NAS level 6 (ISO 17/15/12) or below.

CJC Fine Filter installed on test bench

Solution

CJC Fine Filter units utilize advanced depth filtration to achieve low oil contamination levels. The filter units were designed to integrate smoothly with existing test bench setups, ensuring compatibility and efficiency. The filters demonstrated superior performance by significantly reducing contamination and supporting precision testing.

Hydraulic oil samples before and after filtration

Customer Benefits Summary:

  • CJC filtration units significantly reduced oil contamination and enhanced hydraulic gear pumps quality outcome at the site.


  • The filter units were designed to integrate smoothly with existing test bench setups, ensuring compatibility and efficiency.


  • The Global Pump Manufacturer plans to expand the use of CJC filtration technology across additional test benches due to proven effectiveness.

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