Food Beverage Processing Seals: FDA & 3A Guide

The Challenge: CIP/SIP Cleaning Environments

Food processing seals must survive not only the product they seal, but the aggressive cleaning and sterilization processes that follow. This is where many seals fail — not because of the product, but because of the cleaning.

Cleaning Methods and Their Impact

Method	Description	Seal Material Challenge
CIP (Clean-in-Place)	Clean chemicals circulated through equipment without disassembly	Strong acids, alkalis, high-temp
SIP (Sterilize-in-Place)	Steam sterilization at 121-140°C	High-temp steam, thermal cycling
COP (Clean-out-of-Place)	Parts removed and cleaned in tank	Strong chemicals, high pressure spray
Hot water sanitization	85-95°C water rinse	EPDM or food grade silicone products suitable

Regulatory Framework

FDA-grade silicone kitchenware 21 CFR 177.2600: US standard for rubber articles intended for repeated food contact
EU Regulation 1935/2004: Framework regulation for food contact materials in Europe
EU 10/2011: Specific migration limits (SML) for plastic food contact materials
3A Sanitary Standard 18-03: Sanitary standards for gaskets and seals in dairy/food processing
NSF 51: Food equipment materials — widely required in North America

Material Selection for Food Processing

Material	Temperature	CIP/SIP	Animal Fat	Certifications
EPDM (FDA)	−45 to +150°C	Excellent	Good	FDA, 3A, NSF 51
Silicone (FDA/LFGB)	−60 to +230°C	Good	Fair	FDA, LFGB, NSF 51
NBR (FDA food grade)	−35 to +120°C	Fair	Good	FDA
PTFE (virgin)	−200 to +260°C	Excellent	Excellent	FDA, EU 1935/2004
FKM (Viton® GF-S)	−26 to +205°C	Good	Excellent	FDA

Application Examples by Food Sector

Dairy: Milk pasteurizer plate heat exchanger seals — EPDM or silicone; HTST pasteurizer gaskets
Beverage: Carbonator seals (NBR or EPDM), soft drink flow meter seals (PTFE), beer brewing fermenter seals (silicone)
Meat processing:分割 saw seals (silicone for hot water wash), vacuum packager seal strips (EPDM)
Pharmaceutical: Bioreactor seals (silicone, USP Class VI), lyophilizer door seals (silicone), formulation vessel agitator seals (PTFE)

3A Sanitary Standards for Seals

3A Sanitary Standard 18-03 specifies design requirements for gaskets used in dairy and food processing:

No dead spaces where bacteria can harbor
Smooth, crevice-free sealing surfaces
Self-draining design (no pooling of product or cleaning fluid)
Compressible material that maintains seal under thermal cycling
Compatible with all CIP/SIP chemicals

Design Tips for Food Processing Seals

Specify clamped gasket designs (vs. press-fit) — allows thermal expansion without over-compression
Use full-face gaskets on flanges — distributes load evenly, prevents edge crushing
Add instrumented seal test ports for periodic integrity verification
Select blue or white color materials — makes foreign material contamination visually detectable

Anlintech supplies FDA-compliant seals for food and beverage processing equipment. Our materials include FDA EPDM, food-grade silicone, and virgin PTFE — all with third-party test reports. Request a quotation for food processing seals.

Food & Beverage Processing Seals: FDA, 3A Sanitary & EU Regulation 1935/2004