Food & Beverage Processing O-Ring Guide
FDA-compliant EPDM and silicone seals for CIP/SIP, pasteurization, and hygienic clamp fittings in breweries, dairies, and beverage plants.
Food and beverage processing demands seals that resist hot water, steam, acids, caustics, and peracetic acid—without imparting taste or odor. Regulatory compliance (FDA 21 CFR 177.2600, EU 1935/2004) and cleanability are non-negotiable. This guide covers material selection for tri-clamp fittings, pump housings, valve seats, and dispensing equipment. We explain why peroxide-cured EPDM outperforms sulfur-cured grades in CIP cycling, how to select the right hardness for tri-clamp seals, and best practices for traceability in food-contact applications.
Application Requirements
Recommended Materials
Peroxide-Cured EPDM
Brewery, dairy, and beverage CIP systems
Temp: -50°C to +150°C
Best overall choice for hot water, steam, and CIP chemicals. Passes taste-and-odor panels.
Platinum-Cured VMQ
High-temp baking ovens, coffee machines
Temp: -60°C to +230°C
Excellent for intermittent high heat. Must be formulated for food contact.
White FKM
Flavor-intensive applications, citrus oils
Temp: -20°C to +200°C
Resists aromatic flavor oils and aggressive cleaning agents. High-visibility white color.
Design Tips
- 1.Specify peroxide-cured EPDM rather than sulfur-cured for all CIP/SIP applications to avoid accelerator residue and taste contamination.
- 2.Use 70 Shore A for tri-clamp seals to ensure sufficient conformability against stainless steel flanges without over-compression.
- 3.Select white or blue-colored compounds for visual detection during HACCP and foreign-body inspection programs.
- 4.Document lot numbers and certificates for every batch of food-contact seals to support supplier audits.
Common Sizes
| Size | Typical Use |
|---|---|
| 1/2" – 4" tri-clamp (custom) | Hygienic clamp fittings in dairies and breweries |
| AS568-110 to -125 | Pump and valve seals in food processing equipment |
| ISO 3601 10×2.4 to 50×3.1 | Metric beverage dispensing and filler nozzles |
Frequently Asked Questions
Is EPDM safe for food contact?
Yes, peroxide-cured FDA EPDM is widely used in food and beverage equipment. It resists steam, hot water, and common CIP chemicals without imparting taste or odor.
What is the best O-ring material for brewery equipment?
Peroxide-cured FDA EPDM is the standard for brewery CIP systems. It withstands hot caustic and acid cycles and passes independent taste-and-odor testing.
Can silicone O-rings be used in food processing?
Yes, platinum-cured VMQ that meets FDA 21 CFR 177.2600 is excellent for high-temperature food applications such as baking ovens and coffee machines.
Food-grade seal quote
We supply FDA and EU-compliant EPDM and silicone O-rings for food and beverage processing. Certificates included.