Benefits of Using Spiral Wound Gasket
Most major manufacturing sectors, including the automotive, aerospace, electronics, appliance, and military industries, employ gaskets in their production methods. A gasket is a sealing device made of deformable material usually designed in the form of a ring or sheet. Gaskets create a pressure-tight seam between multiple stationary components, relying on a compression seal to prevent unwanted gas or liquid emissions. These seals are often intended to be resistant to pressure, temperature fluctuations, and in some cases, electrical or electromagnetic forces. Since it uses compression, a gasket is typically more malleable than the components it joins and is able to conform to the shape of the harder surfaces between which it is placed. Gaskets are available in a large number of specifications, making proper gasket selection an important step in many manufacturing processes. They can be formed from a wide range of materials, such as metals, rubbers, plastics, corks, foams, and composite substances. They also come in numerous designs, including jacketed, double-jacketed, spiral wound, and Kammprofile varieties. Finding the right combination of material and design depends on the gasket’s specific uses and the cost parameters of the project.
The spiral wound gaskets are on one the most popular gaskets that are used for critical applications and at high operating pressure.
Manufactured using soft gasket filler and a metal strip, these gaskets can withstand temperature as high as 550 °C and also high pressure. The filler is ensures perfect and dependable sealing and the metal strip is beneficial for quick and easy recovery.
These gaskets are designed in a way that can easily balance the change in pressure and temperature during the sealing process. Moreover, they guarantee excellent and secure sealing.
Spiral Wound Gasket: The Outer Ring and The Inner Ring
Inner and outer rings are particularly recommended for use on spiral wound gaskets exceeding class 600lbs, but specifically recommended for high temperatures and pressures to optimise the operational reliability of the spiral wound sealing element. Inner rings are mandatory for PTFE filled spirals.
The spiral wound gasket outer centering ring provides the following benefits:
Optimum location between the bolts
Protection of the spiral wound element
Additional security against gasket blow-out
Acts as compression limiter preventing overloading and over compression of the spiral wound element
Prevents radial-flow of soft fillers, 1such as PTFE.
For these reasons it is preferable to use spiral wound gaskets with outer centering rings. The outer ring is marked with nominal size, pressure class, standard and materials.
The spiral gasket inner ring provides the following benefits:
Prevents radial-flow of soft fillers, such as PTFE + Graphite
Reduces turbulence-minimising flow resistance
Acts as a heat shield when the spiral wound gasket is subjected to high temperatures.
Materials used for spiral wound gaskets
The metallic strips that are commonly used in the manufacturing of these gaskets are SS316, SS304, SS316Ti, SS316L and SS321. For the rings in the centre, carbon steel is more often used.
For fillers the most commonly used materials are PTFE, graphite, mica and ceramic paper.
Where you can find Spiral Wound Gaskets?
There are several spiral wound gasket supplier, ring joint gasket supplier and other types in all metal grades and construction as well as insulation kits that you can find in the market, here in Dubai you can buy gaskets from a reputable company like Gerab, which is known for providing superior quality products.
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