The outer centering ring of Spiral Wound Gaskets has the following advantages:
The best position between the bolts
Protect spiral wound components
Additional safety to prevent gaskets from bursting
Acts as a compression limiter to prevent overload and excessive compression of spiral wound elements
It can prevent the radial flow of soft packing such as PTFE.
For these reasons, it is best to use spiral wound gaskets with external centering rings. The outer ring is marked with nominal size, pressure rating, standard, and material.
The inner ring of Spiral Wound Gaskets has the following advantages:
Prevent radial flow of soft packing (such as PTFE + graphite)
Reduce turbulence and minimize flow resistance
When Spiral Wound Gaskets of Metal Jacketed Gaskets Manufacturers withstand high temperatures, they act as heat shields.
It is especially recommended to use the inner ring and outer ring for spiral wound gaskets over 600 pounds, but it is especially recommended for high temperature and high-pressure conditions to optimize the operational reliability of spiral wound sealing elements. The inner ring is essential for the PTFE-filled spiral.
The material used for the inner ring and winding metal is usually the same as the flanged metal. This prevents the problems of corrosion and poor expansion. The outer centering ring is usually made of anti-corrosion-treated carbon steel. However, the ring can also be made of the same metal as the flange to prevent corrosion problems.
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