The Engineered Materials Group of Parker Hannifin presented its extensive range of large-size seals at the 2017 Hanover Fair. Thanks to new manufacturing technologies, Parker Prädifa is now able to offer machined seals made of high-performance polymer materials in diameters up to 4,5 metres, metallic C-Ring in diameters up to 7,6 metres and precision elastomer O-rings in practically any desired diameter.
In a wide range of industries, in addition to average-size and miniaturised equipment, large-scale systems are used that require components and sealing systems matching the size of the equipment. While average sealing systems rarely have diameters larger than 100 mm, diameters of several metres are not uncommon in some sectors. Examples include manufacturing plant and equipment, buildings and pipelines, tunnel construction and mining, energy, high-tech medicine, aerospace and many others.
The production of large seals for challenging applications is not simply a matter of scaling up know-how of traditional seal design and machining. The reason is that XXL sizes not only pose particular handling challenges in the manufacturing process, but do so even earlier, in the design and testing stages.
As a specialist in engineered materials, engineering design and process technology Parker Prädifa offers an extensive portfolio of large-size seals and melded parts made of polymers such as NBR, EPDM, FKM, PTFE and PEEK, as well as metal. Available options include precision O-rings manufactured by vulcanisation in a closed mold using compression or injection molding; XXL seals machined from thermoplastic materials; and metal seals for harsh application conditions.
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