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Del Williams

FDA Compliance

Compliant Steam Filtration Is Key to Food and Beverage Safety

Purified steam maintains product integrity while filter cleaning and sterilization prolongs equipment life

Published: Wednesday, August 12, 2020 - 12:02

Approximately 48 million people in the United States (one in six) get sick, 128,000 are hospitalized, and 3,000 die each year from foodborne diseases, according to the Centers for Disease Control and Prevention. Consequently, the FDA Food Safety Modernization Act (FSMA) is transforming the nation’s food safety system by shifting the focus from responding to foodborne illness to preventing it.

As part of the focus on preventing foodborne illness, 3-A Sanitary Standards, an independent, not-for-profit corporation for advancing hygienic equipment design for the food, beverage, and pharmaceutical industries, has recently updated its standards. The company, which maintains a large inventory of design criteria for equipment and processing systems developed to promote acceptance by USDA, FDA, and state regulatory authorities, no longer accepts “3-A compliant” as a legitimate claim.

To achieve certification and be authorized to display the 3-A symbol for food and beverage, steam filtration now requires additional equipment refinement, such as electropolished rather than bead-blasted surfaces, and sanitary clamps instead of threaded pipe joints. Attending to such details in equipment that produces culinary-grade steam will help ensure food-and-beverage safety as well as regulatory compliance.

Essential, compliant steam filtration

In the food and beverage industry, steam boilers are used for a vast array of processes. This includes cooking, curing, and drying; distilling certain types of beverages; sterilizing and disinfecting tools and utensils; and reducing microbiological threats. Many processing facilities also utilize boiler-generated steam to power machines that are used to prepare various foods and beverages.

When steam is used to transfer energy, it is typically generated at a central location, and the energy is distributed to various points throughout a facility. Depending on the application, and whether contact is made with the final product itself, steam will require filtration to prevent process contamination.

To comply with rigorous food-and-beverage processing safety regulations as well as enhance equipment reliability and longevity, industry professionals are using a culinary-grade steam filter. In the United States, steam used in food processing is expected to meet 3-A Sanitary Standards and 3-A Accepted Practices for Dairy and Food Processing applications. Equipment that meets the highest food-and-beverage quality standard in this regard achieves certification.

As an example, with a 3-A Culinary Steam Filter from R.P. Adams, a Buffalo, New York-based manufacturer of steam filtration products for food and beverage and other industries, the steam can make direct contact with the final product.

The purified steam is essential to maintain product integrity, and can be used in culinary and food applications such as cooking, sterilization, and packaging. The improved quality of steam used for filter sterilization also ensures a longer service life for filter and process equipment because it screens out harmful particulates and impurities to a greater degree than standard processes.

In such applications, properly sizing a steam filter system depends on a number of variables, including element micron rating, flow rate, pressure, temperature, and acceptable pressure drop across the filtration system.


For culinary steam applications, a process filtration element from R.P. Adams exceeds the 3-A requirement of 5-microns at 95-percent efficiency.

For culinary steam applications, a process-filtration element from R.P. Adams, for example, exceeds the 3-A requirement of 5-micron at 95-percent efficiency. At 2-micron retention efficiency at 95-percent efficiency, it provides superior purified steam to maintain food and beverage integrity. A number of different-rated micron sizes are also available.

The micron rating selection for applications will depend on the challenge rate, size of particles to be filtered, and the purity requirements of the downstream process using the filtered steam. If the challenge is high in terms of particle count or size, use of a stainless steel prefilter is advised. Both the stainless steel and sintered stainless-steel elements can be regenerated, and a combination of both as prefilter and after-filter will ensure the most reliable and economic installation.

A stainless-steel filter element contains no binders, adhesives, additives, or surfactants, so it will not shed such contaminants, and it is approved for food contact according to U.S. FDA CFR Title 21 and 1935/2004/EC.

Filter media made of sintered 316 L stainless steel in turn meet U.S. FDA CFR Title 21 and 1935/2004/EC requirements for food and beverage. They also provide additional corrosion resistance to expected contact with product as well as cleaning, sanitizing, or sterilization compounds or solutions.

For culinary-grade steam filtration, filter media require additional hygienic safeguards, while filter cleaning and sterilization can significantly prolong equipment service life.

In compliance with the latest requirements, equipment like the 3-A Culinary Steam Filter have no threads on any product contact surfaces, which helps to prevent potential dirt or bacterial accumulation. Instead, sanitary clamps are utilized at pipe joints. Additionally, there is a smooth, electropolish finish on all contact surfaces, so there are no nooks and crannies for bacteria to grow.

To enhance food-and-beverage industry reliability and operational uptime, such filter media are designed to withstand 75 lb PSID, which allows longer use before cleaning is necessary. The elements are also 100-percent reusable up to six times with regenerative ultrasonic cleaning and sterilization, which makes their operation more cost effective.

With growing attention on food safety in the marketplace, the use of filters achieving 3-A sanitary certification will help to ensure regulators and consumers that products produced or prepared with industrial equipment meet the most rigorous standards. The superior filtration will also substantially improve equipment reliability and lengthen service life.

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About The Author

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Del Williams

Del Williams is a technical writer based in Torrance, California. He writes about business, technology, health and educational issues, and has an M.A. in English from C.S.U. Dominguez Hills.