Parker Prädifa XXL-size seals and moulded parts

26 October, 2017

XXL seals machined from thermoplastic materials

Polymer materials like PTFE and PEEK are suitable for machining such as turning or milling. This makes it possible to economically manufacture both larger and smaller volumes because no additional tooling costs for molds are incurred.

Parker Prädifa has been producing complex machined polymer seals with diameters of up to 3 m for decades. In light of a growing demand for increasingly large seals, Parker Prädifa has continually developed the manufacturing technology of machining further and is now able to offer diameters of up to 4.5 m at the highest level of quality. The production of even larger diameters is currently in the pipeline.

Metal seals for harsh application conditions

The most important manufacturing technologies used to produce metal seals from stainless steel or nickel alloys are rolling, forming, CNC machining, welding, heat treatment and coating/plating. In its more than 60-year history of producing metal seals, Parker has continually tackled the challenge of manufacturing increasingly large metal seals. Currently, spring-energised C-rings with a diameter of up to 7.6 m can be produced for which special forming machines and patented welding techniques were developed. They are supported by optimised special heat treatment and electroplating processes that make it possible to manufacture high-quality products even in such large dimensions. Additionally, Parker offers non-rotationally symmetric metal seals. These E-, O- and C-seals can be produced in lengths of up to 2.3 m on machines specifically developed for this purpose.

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