Custom O-rings and Shapes

Customized cross-section and diameter dimensions are available for shipment in just five working days. We make them to your order using our patented O-ring splicing technology.

Custom shapes are designed and molded to your specific requirements. Typical custom shapes include valve seats, diaphragms, gaskets, packer seals, T-seals, column fittings and more.

Custom parts and components with unusual geometries can be designed and molded in Kalrez® perfluoroelastomer parts to meet the needs of specific sealing applications. Examples include special profiles and rectangular-shaped seals for slit valves and windows: metal-bonded parts, profiled quartz tube seals, diaphragms, lip seals, hollow O-rings, tubing and other specialized configurations.

Kalrez® QS Spliced O-rings: The Quick-sealing Solution with Long-term Performance

Now, a patented splicing method created by DuPont enables quick production of O-rings that conform to most industry specifications or to your custom requirements. This exciting technology reduces the manufacturing time for spliced O-rings as well as the cost hurdles associated with custom O-rings. Whether your intended use is prototyping or large-scale commercialization, spliced O-rings deliver a quick-sealing solution with the well known performance of Kalrez® parts.

A Range of Sizes and Compounds to Meet Your Needs

You're no longer bound by industry standard sizes when you need the performance of Kalrez® parts. Kalrez® QS spliced O-rings can be produced in a broad range of customized cross-section and diameter dimensions to meet your specific needs. Cross sections are available within a range of .070" to .500" (1.78 mm to 12.7 mm), with any inside diameter not less than 6.000" (152.40mm). Spliced O-rings are currently available in several compounds, including Kalrez® 4079.

Outstanding Performance

Kalrez® is well known for its outstanding chemical resistance and thermal stability. Kalrez® QS O-rings demonstrate the chemical resistance of the base compound used for Kalrez® parts with thermal performance up to 260°C (500°F). For compounds with higher thermal capabilities, applications involving temperatures greater than 260°C (500°F) may be restricted to static seal designs. It is necessary that you understand your service requirements before selecting Kalrez® QS parts.

How to Specify Your Part

You can specify Kalrez® QS two ways; industry-standard reference or explicit inside diameter with cross-section dimensions. Kalrez® QS spliced O-rings can be produced according to several industry standards: SAE AS 568, ISO 3601, JIS B2401, or comparable O-ring standard.

Dimensional tolerances for Kalrez® QS are provided in the table below. Surface quality complies with MIL-STD-413C when applying the parting line requirements to the splice area. For other dimensional and surface specifications, contact your authorized Kalrez® distributor.