Seal Materials

The material the seal is made from is tailored to your application requirements. We start by understanding the media, pressures, temperatures, dynamic conditions, mating surfaces, tolerancing, required lifetime and so on. Darcoid maintains an extensive database of materials optimized for specific use applications. Based on your inputs during a simple onboarding conversation, our engineers will quickly zero in on the formulations that will pass your project statement of requirements (SOR).

“Rubber” is a polymer-based compound cured (sometimes known as “vulcanized”) to form a thermoset elastomer. The base polymer formulations are grouped into over a dozen elastomer “family” types. Within those elastomer families there can be hundreds of sub-formulations developed to optimize seal performance in a variety of operating conditions and performance requirements. Engineered Elastomer family types include all common and exotic elastomer groups such as: FKM Viton^TM flouroelastomer; Hiflour^TM fluoroelastomer; EPDM EPR Ethylene Propylene, Ethylene Propylene Diene Monomer; Acrylonitrile-butadiene Nitrile BunaN, NBR; AU Polyurethane; Silicone VMQ, LSR; Fluorosilicone FVMQ; Hydrogenated Nitrile; Perflouroelastomer FFKM Kalrez^TM, Chemraz^TM Parofluor^TMUltra^TMPerlast^TM; HNBR; XNBR; Butyl IIR; and Tetrafluoroethylene-Propylene AFLAS^TM. Within each main polymer family there are many hundreds of variants specially compounded with physical properties dialed in for specific use applications such as wear resistance, anti-extrusion, low compression set, low temperature resiliency, friction reduction, explosive decompression resistance (EDR), and so on.

Materials are available in most polymer family types formulated to meet regulatory requirements and industry standards including FDA A-F, USP VI, 3A c.1, WRAS, ADI

Note re FDA:  Food and Drug Administration 
US administrative law, Code of Federal Regulations Title 21 
Regulation: responsibility for demonstration of compliance with CFR 21.177.2600 lies with the rubber manufacturer 
Paragraph A-D
List the ingredients and quantitative limits (only suitable for Dry Foods) 
Paragraph A-E
Extraction testing in water and n–hexane (suitable in Dry and Aqueous) 
Paragraph A-F
Suitable in Dry Aqueous and Fatty

And engineered thermoplastics

Where media, pressures, and dynamics drive material selection beyond elastomers we move into engineered thermoplastics and metals (PTFE Teflon^TM, PEEK, Delrin^TM  acetal resin polyoxymethylene (POM), polyimide Vespel^TM, PFA, FEP, ETFE, ECTFE, PCTFE, PVDF, etc.).

Engage with our technical team to take the guesswork out of material selection.

Aflas is a registered trademark of Asahi Glass Co., Ltd
Chemraz is a registered trademark of Greene, Tweed Technologies, Inc.
Delrin is a registered trademark of Dupont Polymers, Inc.
Kalrez is a registered trademark of Dupont Polymers, Inc.
Parofluor, Ultra are registered trademarks of Parker Hannifin Corporation
Perlast is a registered trademark of Precision Polymer Engineering Limited.
Teflon is a registered trademark of the Chemours Company
Vespel is a registered trademark of Dupont Polymers, Inc.
Viton is a registered trademark of the Chemours Company

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Seal Materials

So much more than "black rubber"

And engineered thermoplastics