Greene Tweed Offers Manufacturing Solutions for Large-Diameter O-Ring Seals

Extensis® and horseshoe molding solutions for elastomeric seals required for large equipment

Lansdale PA - Greene Tweed, a leading global manufacturer of high-performance sealing solutions and engineered components, announces its manufacturing solutions for large-diameter o-ring seals.

These seals are produced using either the Extensis® molded o-ring or horseshoe molding methods. Both techniques are ideal for manufacturing elastomeric seals that exceed the size limitations of conventional compression molding presses.

The Extensis® method provides a superior joint by bonding partially cured extrudate segments with a proprietary curing agent that is compositionally similar to the base material. The o-ring is then post-cured, de-flashed, and buffed as required, similar to the traditional compression molding process. The Extensis® method can be used for o-rings with a minimum inner diameter limit of 42 inches; there is no limit to the maximum inner diameter.

Greene Tweed's horseshoe molding process, used in high-pressure, vacuum, dynamic, or other extreme applications, is ideal for critical equipment where asset integrity is paramount, such as compressors used in the oil & gas industry. The horseshoe molding process is consistent with that of typical compression molded o-rings and produces a truly homogenous joint with the highest performance. The process can be used for o-ring seals with a 28-inch minimum inner diameter limit, and no limit to the maximum inner diameter.

Greene Tweed performs extensive dimensional and visual inspection for large o-rings using standard measurement tools, best-in-class optical non-contact measurement systems and ISO 3601-3 criteria. Upon customer request, additional quality assurance criteria can be accommodated, such as 100-percent inspection or ISO 10423 destructive testing for high magnification crack verification.

For more information about capabilities and elastomer compounds available, see
About Greene Tweed

Combining more than 150 years of technical expertise and commercial knowledge in a variety of markets, Greene Tweed collaborates with customers to develop engineered solutions that meet challenging performance requirements and reduce total cost of ownership. Greene Tweed products are sold and distributed worldwide. For additional information, call +, or visit our website at

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