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Spiral Wound Gaskets

One of the best all-around seals, the spiral wound gasket offers a low-cost solution that has the ability to handle temperature and pressure fluctuations. Widely used throughout refineries and chemical processing plants, spiral wound gaskets are also effective for power generation, pulp and paper, aerospace, and a variety of valve and speciality applications

A SW consists of a V-shaped metal strip spirally wound in combination with a soft, filler material. The metal strip provides outstanding recovery, while the flexible filler guarantees excellent sealing. Due to this combination of materials, the spiral wound gasket is suitable for sealing under severely fluctuating temperature and pressure conditions. Manufactured in accordance with ASME B16-20.

1-Type R
Basic construction type. Inner and outer diameters are reinforced with several plies of metal without filler to give greater stability and better compression and sealing characteristics. Suitable for tongue and groove or male and female for grooved to flat face flange assemblies.

2-Type RIR
Solid inner metal ring acts as a compression stop and fills the annular space between flange bore and the inside diameter. Designed to prevent accumulation of solids, reduce turbulent flow of process fluids and minimise erosion of flange faces. Suitable for male and female pipe flanges.

3-Type CRIR
A gasket fitted with a solid inner and outer ring which gives an additional compression limiting stop, and provides a heat and corrosion barrier, protecting gasket windings and preventing flange erosion. Suitable for use with flat face and raised face flanges and specified for high pressure/temperature service - class 900lb and above or where corrosive or toxic media are present.

4-Type CR
Use an external ring which accurately centres gasket on flange face, provides additional radial strength to prevent gasket blow-out and acts as a compression stop. A general purpose gasket suitable for general, lower pressure mainly for use with flat face and raised face flanges up to and inclusive of class 2500. Above class 600 an internal ring is recommended.

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