Parker Hannifin

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242 Neck Rd.
Haverhill , MA 01835


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Reducing Contamination Risks of Compressed Air in Food Plants: Benchmarking Good Manufacturing Practices

Lee Scott, Parker Hannifin Corp.

A GMP Template for Food Plants Using Risk-based Systems:

  • HACCP Procedures
  • GFSI - SQF Code

The objective of this technical paper is to benchmark published Good Manufacturing Practices as they relate to compressed air use in a food processing facility in both a HACCP and/or Global Food Safety Initiative (SQF or BRC) environment.

Any modern food manufacturing facility employs the use of compressed air extensively in the plant. As common as this is, the potential hazards associated with this powerful utility are not obvious and apparent. Food hygiene legislation to protect the consumer places the duty of care on the food manufacturer. For this reason, many companies often devise their own internal air quality standards based upon what they think or have been told is ‘best practice.’ This is no wonder, as the published collections of Good Manufacturing Practices (GMP) that relate to compressed air are nebulous and difficult to wade through. Understandably this has led to a significant difference in the quality of compressed air used throughout the indust ...


Analysis of Coalescing Efficiency in Replacement Filter Elements

Allan Fish Product Manager – Filtration, Parker Hannifin Corp.


High efficiency coalescing filters are often specified when there is a need to protect sensitive equipment that is operated by compressed air. A high efficiency coalescing filter can tame the effects of oil, water, and particulates that are present in virtually all compressed air supply lines. A high quality coalescing filter element will typically have a rated filtration efficiency of somewhere 95% and 99.999+%. The required level of filtration efficiency is dependent upon the quality of the compressed air in the supply line, and the sensitivity of the equipment or process that is connected to the line. For example, when compressed air is used to propel paint to the surface of an automobile body, it is imperative that the compressed air be as pure as possible in order to avoid defects in the painted surface. Therefore, coalescing filters with very high efficiencies are often specified for critical applications.

Replacement Element Performance Comparison

Recently, a customer asked about the use of “non-branded” replacement filter elements, purchased from a retailer over the internet, to replace a coalescing fi ...


Compressed Air: An Overlooked Source of Contamination in the Food Industry

Allan Fish, Parker Hannifin Corporation and Peter Froehlich, Peak Media

Compressed air is used in a broad range of applications in the food processing industry such as mixing of ingredients, cutting, sparging, drying of product, transporting/propelling product through processing systems and packaging of final product. In many of these applications, compressed air is in direct contact or indirect contact with food product and the impurities in the compressed air may contaminate the food product which can result in change of color and taste, reduced shelf life, in addition to exposure to bacteria and other microorganisms can result in product recalls.

Compressed air, which is generated on site by pulling in ambient air and compressing it, contains water vapor, particulate matter (atmospheric air typically contains 140-150 million dirt particles/m3)1 oil vapor and droplets and microorganisms such as bacteria, viruses, fungi and spores (atmospheric air can contain up to 100 million microorganisms/m3)2 In addition, compressed air will also contain liquid oil, oil aerosols and oil vapor which leak in through worn seals, orifices and o-rings within the compressor. Since the compression process raises the t ...


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