John Fowler understands customer's filtration requirements and accordingly designs the filters. They are manufactured with utmost care and expertise so that the final requirements are fully met. The range of industrial filters supplied by John Fowler includes panel filters and HEPA filters for heating ventilation and air conditioning application, compressed air filters, gas filters etc. and also liquid filtration products such as hydraulic filters, coalescers and separators for aviation fuel, water filters.

Panel filters are of two types- pre filters and fine filters. These filters are tested as per relevant national / international standards. All HEPA filters are tested as per DOP test procedure using particle counter and certified individually for DOP efficiency of 99.97% down to 0.3 micron. John Fowler makes MIL standard HEPA filters also for more stringent applications.


John Fowler supplies hydraulic filters with flow rate ranging from 10 lpm to 450 lpm as per customers' requirement. These filters are tested generally as per
ISO 16889 standard or as per customer specification for performance.

After extended R&D trials, John Fowler has developed coalescers and separators used for filtration of aviation fuel for removal of particulates and free water from aviation turbine fuel. These filters are tested in the laboratory as per standard API 1581 - 5th Edition.