3-A O-Rings

Protect Dairy Products and Consumers with 3-A O-Rings and Seals.

3A Sanitary Standards Compliant Sealing Solutions for the Food and Dairy Industry

Formed by the US food and Dairy industry, 3A Sanitary Standards Inc. defines specifications and best practice for the design, manufacture, installation and use of hygienic equipment. As with FDA, the 3-A standards are adopted on a worldwide basis.

Marco Rubber elastomers meeting the UDSA 3-A standard include 3A EPDM, 3A Markez®, Viton® allowing equipment manufacturers/users to select the most appropriate elastomer to temperature, chemical and physical performance criteria. An additional requirement some of our 3A O-Rings and materials meet is free from animal derived ingredients (ADI-free).

Popular Products

  • O-rings, Micro and Giant
  • Tri-Clamp Gaskets or Sanitary gaskets
  • PTFE encapsulated O-rings
  • X-rings and washers
  • Custom Molded

Popular Materials

  • 3A Dairy Compliance
  • ADI Free Materials
  • LIM silicone per customer specification
  • Clean Room Manufacturing and Packaging

Popular Compounds

Compound #DatasheetMaterialHardness (Shore A)ColorLow Temp °F (°C)High Temp °F (°C)FDAUSP Class VINSF61USDA 3AMetal DetectableFeatures
EPDM70Black
300
(149)
-65
(-54)
Peroxide cured EPDM, Different Durometer, KTW, WRAS standards available
EPDM70White
300
(149)
-65
(-54)
Wide range of compliance
EPDM70Black
250
(121)
-40
(-40)
Wide range of compliance
EPDM70Black
300
(149)
-65
(-54)
Formulated for Chloramine Resistance. Can be manufactured in custom shapes with minimal setup charge
NBR70Black
250
(121)
-30
(-34)
Available in many durometers and colors
NBR70White
250
(121)
-30
(-34)
Available in many durometers and colors
NBR70Black
250
(121)
-30
(-34)
KTW, WRAS and other standards available
NBR70Black
250
(121)
-30
(-34)
Metal detectable for contamination detection sensors(additional colors available)

FDA compliance per 21 CFR 177.2600 parts A-D, E&F approved compounds available upon request. **USP <87> and USP <88> approved compounds available upon request.

The information on this page is to the best of our knowledge accurate and reliable. However, Marco Rubber makes no warranty, expressed or implied, that parts manufactured from this material will perform satisfactorily in the customer's application. It's the customer's responsibility to evaluate parts prior to use.

The temperature ranges presented on this page are approximations for dry air service only and should not be used to determine design specifications or end-use temperature limits. Actual temperature range of a compound in an end-use application is highly dependent on part type, hardware configuration, applied forces, chemical media, pressure and thermal cycling effects, and other factors. The most practical way of determining an end-use temperature range is testing in the actual application conditions. Consult a Marco Engineer for more details.

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