OZ Seals has released a seal with double-acting crown backing and up to five sealing edges.
According to the company, the Oz Sipring seal’s multiple edges allow for better sealing and smoother operation than conventional seals. The design is said to allow the seal to hold more lubrication in the valleys of the seal profile to reduce friction.
The backing crown allows for more effective sealing with less friction and no “pump effect”. The “pump effect” is the action of compression of a seal such that an oil ring is left on the rod on expansion, causing drips.
The seals are made of a polymer which is said to resist cracking under repeated flexing. They also have high load bearing capability in tension, compression and shear.
Single action seals with double-acting crown backing are said to be better able to withstand a wide range of operating temperatures. The seals can withstand temperatures from negative 50 to 120 degrees Celsius, and do not exhibit stick slip under low pressure.
The seals are available in five configurations and are said to have applications in a range of critical hydraulic rod and piston sealing applications. They come in sizes up to 2m in diameter.
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