FFKM Kalrez 6221 O-Ring, Size: -018
Material: FFKM Kalrez 6221 O-Ring
Size: AS568 -018 O-Ring
Part Number: KP6221-OR-018
Color: White
Detailed Description
KP6221-OR-018 is a White, 70 Shore A, FFKM (Perfluoroelastomer) O-Ring made from Kalrez® (Dupont). It is a 75 durometer FFKM (Perfluoroelastomer). Kalrez® (Dupont) 6221 is manufactured with the following features & specifications: USP Class VI, FDA Compliant. KP6221-OR-018 is AS568 size -018 O-Ring also referred to as 1.78mm (Cross Sectional Diameter (CS)) x 18.77mm (Inside Diameter (ID)).
Material: 70 Durometer FFKM Kalrez 6221 O-Ring
Size: AS568 -018, 1.78mm CS X 18.77mm ID (0.070" CS X 0.739" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | KP6221 |
| Brand | Kalrez® (Dupont) |
| Material | FFKM (Perfluoroelastomer) |
| Color | White |
| Durometer | 70 Shore A Hardness |
| High Temperature | 260 °C / 500 °F |
| Low Temperature | -15 °C / 5 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | O-Ring |
| Size Standard | AS568 |
| Size | -018 |
| Cross Section (CS) | 1.78 mm / 0.070 in |
| Inside Diameter (ID) | 18.77 mm / 0.739 in |
| Other Specifications | |
USP <88> | |
USP <87> | |
USP Class VI | |
FDA Compliant | |
DuPont™ Kalrez® 6221 (KP6221) is a 70 Shore A white perfluoroelastomer (FFKM) specifically engineered for pharmaceutical, biotech, and food handling applications where ultra-low extractables, chemical purity, and regulatory compliance are critical. Fully compliant with FDA requirements and USP Class VI <87> and <88>, this material delivers exceptional resistance to aggressive water systems such as Water for Injection (WFI), ozonated deionized water, and repeated Steam-in-Place (SIP) cleaning cycles. With a maximum continuous service temperature of 260°C (500°F), Kalrez® 6221 maintains mechanical integrity and sealing performance during high-temperature sterilization processes where many elastomers fail. Its fully saturated perfluoroelastomer backbone provides PTFE-like chemical resistance while retaining the elasticity required for reliable O-ring and gasket sealing.
Kalrez® 6221 is commonly used for O-rings and sanitary gaskets in pharmaceutical processing equipment, sterile fluid transfer systems, clean utilities, and food production lines where contamination control is paramount. The compound exhibits extremely low to non-detectable extractables, low swell, and minimal loss of physical properties after repeated steam and water exposure, helping reduce downtime and product risk. This material is a preferred choice for critical sealing points in regulated environments requiring long service life and validation support. Canyon Components offers equivalent white, high-purity FFKM materials designed to meet similar FDA, USP Class VI, WFI, and SIP performance requirements for pharmaceutical and food processing applications.
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