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 Performance Elastomers 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.

Fast Delivery

In addition to improving its offering, DuPont Performance Elastomers has substantially reduced delivery lead time. Most Kalrez® QS spliced O-rings have a manufacture time of just five working days not including packaging and shipping. UltraPure compounds for reduced contamination requirements need an extra five days. For faster service, even same-day shipment, take of advantage of Expedited Purchase Orders. Delivery commitments are determined at the time your order is made with DuPont Performance Elastomers.

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.