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Spiral wound gaskets are special semi-metallic gaskets of great resilience, therefore they are very suitable for applications featuring heavy operating conditions. Spiral wound gaskets are manufactured by spirally winding a V-shaped metal strip and a strip of non-metallic filler material. The metal strip holds the filler, providing the gasket with mechanical resistance and resilience. Spiral wound gaskets can be reinforced by an outer and/or inner retaining ring. The outer centring ring controls the compression and holds the gasket centrally within the bolt circle. The inner retaining ring increases the axial rigidity and resilience of the gasket. Spiral wound gaskets should always be in contact with the flange and should not protrude into the pipe or project from the flange. Spiral wound gaskets can be used for sealing flange joints, manhole and handhold covers, tube covers, boilers, heat exchangers, pressure vessels, pumps, compressors and valves; in industries such as petrochemical, pharmaceutical, shipbuilding, and food processing, in power industries and nuclear power stations. They are ideal for steam, oil, liquids, gases, acids, alkalines, various organic media and solvents.
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The spiral joints are designed especially to withstand strong pressures and to ensure of important levels of sealing and safety. In order to limit crushing to tightening, they can integrate an interior metal ring for the safety of rolling up and an outside for safety and centering of the joint.
The Group Eynard Robin:
- of exclusiveness distributes spiral joints KLINGER: particularly adapted to seal strong pressures in liquid and gas
- manufactures spiral joints EYRFLEX: available in the dimensions standardized IN or ASME, or conceived on plan for the constructed boilers apparatuses or special supports
These products adapt to many operating conditions:
- various possible material combinations (stainless steels, Monel metal, Nickel, Inconel...)
- resistance to temperatures from -200 to +1000 °C
- use with pressures of vacuum up to 430 bar
- all dimensions up to 4 m in diameter and 2,5 to 6,4 mm thickness
They are approved safety fire (API 6FB).
The standard spiral joints claim more tightening than a cut out flexible joint and cannot thus be gone up on weak supports. On the other hand, for these weak supports, of spiral joints LD were developed.
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