FDA-Grade Silicone O-Rings for Pharmaceutical and Food Equipment

Skytech Ultrafab Silicon O-Rings are precision-moulded circular sealing elements manufactured from FDA 21 CFR-compliant platinum-cured silicone rubber for static and dynamic sealing in pharmaceutical process equipment, food and beverage machinery, autoclaves, and chemical process connections. Available in all standard AS568 and metric sizes and in 40–80 Shore A hardness grades, Skytech silicone O-rings provide consistent sealing performance across repeated steam sterilisation, CIP cleaning, and process temperature cycles — outperforming EPDM and nitrile in pharmaceutical and high-temperature food service.

What Is a Silicone O-Ring?

An O-Ring is a torus-shaped (donut-shaped) elastomeric seal that sits in a machined groove and is compressed when the joint is assembled, creating a pressure-tight seal between two mating surfaces. Silicone O-rings are selected over other elastomer O-rings when the application requires: FDA-compliant food or pharmaceutical contact material, service temperatures above 120°C, repeated steam sterilisation cycles, or flexibility at sub-zero temperatures. Silicone has a broader temperature range than EPDM, nitrile, or neoprene and better biocompatibility for direct product contact.

Features and Benefits

• Platinum-Cured FDA Silicone: Platinum catalyst system eliminates peroxide residues present in standard-cured silicone — dramatically lower extractables and no peroxide odour or taste transfer to pharmaceutical and food contact products
• All Standard Sizes: Full range of AS568 imperial sizes (002–460) and ISO metric sizes (from 1 mm ID × 1 mm section) available — covers all standard O-ring groove designs in process equipment
• Multiple Hardness Grades: 40, 50, 60, and 70 Shore A hardness available — correct hardness specified for each groove and sealing load to achieve optimum compression and sealing performance
• Steam and Autoclave Rated: Withstands repeated 134°C / 2 bar autoclave sterilisation cycles without significant compression set — maintains sealing force through the full planned replacement interval
• Wide Chemical Compatibility: Compatible with dilute acids, alkalis, alcohols, and standard CIP/SIP cleaning agents used in pharmaceutical and food equipment — resists common sanitisers without swelling or surface degradation
• Colour-Coded Grades: Translucent (standard), red, and blue silicone available — colour coding assists grade identification and traceability in facilities using multiple O-ring materials

Technical Specifications

Applications

• Pharmaceutical Process Equipment: Sealing pump heads, valve seats, sight glass fittings, and flange connections on pharmaceutical process vessels and transfer systems — FDA material required for product-contact sealing
• Autoclave and Steriliser Connections: Sealing autoclave door interlocks, steam supply connections, and jacket flanges — steam-rated silicone withstands repeated sterilisation cycles without gasket change between each
• Food and Beverage Equipment: Pump, valve, and fitting O-rings in food processing and beverage production equipment — FDA platinum-cured silicone ensures no taste or odour transfer to the processed product
• Biopharmaceutical Equipment: Bioreactor, chromatography column, and UF/NF membrane housing O-rings — platinum-cured silicone meets the extractable and leachable requirements of biopharmaceutical manufacturing
• Chemical Process Connections: General process flange and fitting O-ring service where silicone chemical resistance and temperature range exceed the capability of EPDM or nitrile alternatives

Why Choose Skytech Ultrafab for Silicon O Ring?

• Platinum-Cure Advantage: Platinum-cured silicone provides lower extractables, better compression set, and longer service life than peroxide-cured O-rings — the correct specification for pharmaceutical and food direct-contact sealing
• Complete Size Range from Stock: AS568 and ISO metric sizes maintained in stock across all standard hardness grades — same-week delivery for most pharmaceutical and food equipment O-ring replacement requirements
• GMP Documentation: FDA 21 CFR certificates, platinum-cure confirmation, and hardness test data supplied for pharmaceutical equipment qualification files and change control documentation
• Bulk Quantity Pricing: Volume pricing for large O-ring seal kits covering complete process plant equipment — significant per-piece discount for consolidated facility-wide O-ring supply orders
• Technical Specification Support: Correct hardness, size, and material specified for each sealing application — ensuring optimum compression, sealing performance, and compliance in every pharmaceutical and food use case