Spiral Wound Gaskets – Norton Gaskets Private Limited

Spiral Wound Gaskets are special semi-metallic gaskets of great resilience; therefore they are very suitable for applications featuring heavy operating conditions. SWG 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. SWG can be reinforced by an outer centering ring and/or inner retaining ring, The outer centering 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 and acts as a Heat and Corrosion barrier eliminating turbulence between the gasket Inner diameter and the flange bore so avoiding erosion of the flange faces.

ADVANTAGES

Sealing under heavy operating conditions,
Strong stress compensation,
Stable and Reliable sealing performance even under frequent pressure fluctuation conditions,
Solid construction provides stability
Seal ability even when the sealing surfaces are slightly corroded or bent,
Easy installation meters

SWG Standard Styles

Basic Type

Basic construction type, inner and outer diameters are reinforced with several piles of metal without filter to give greater stability and better compression characteristics – Suitable for tongue and groove, male and female or grooved to flat face flange assemblies.

Inner Ring Type

Solid inner metal ring acts as a compression stopper. To prevent accumulation of solids, reduce turbulent flow of process fluids and minimize erosion, damages of gasket between flange bore and the inside diameter, the annular space is filled up by solid inner metal ring – Suitable for male and female pipe flanges.

Outer Ring Type

Solid outer ring accurately locates the gasket on the flange face to give the additional radial strength to prevent the gasket blowout and acts as a compression limiter. In case of installing the outer ring, it is very easy to install the gasket to flange face because the end of outer ring will touch at bolts – Suitable for use with flat face and raised face flanges. For class 900 and above an internal ring is recommended.

Inner and Outer Ring Type

A inner ring and outer ring type gasket will give an additional compression limiting stopper for gasket inner and outer side. It will prevent the corrosion on flange face at annular space. – Suitable for use with flat face and raised face flanges and specified for high pressure / temperature service – Class 90o and above or where corrosive or toxic media are present.

DIMENSIONS:

Standard Sizes: Acc. To ASME/ANSI, DIN, BS, JIS & Non-Standard sizes upon request, Manufacturing Thicknesses: 3.2 mm; 4,5 mm; 6,5 mm and 7,2 mm

MATERIALS

Standard Filler: Flexible Graphite, PTFE, Non-Asbestos, Ceramic etc.. Standard Metals: SS316L, SS316, SS3o4, SS3o4L, SS321, SS347, Monel, Inconel, Incoloy, Titanium etc.

Spiral wound gaskets have proven to be the most reliable sealing element for use in difficult, critical and arduous duties Spiral wound gaskets are used in refinery, Petrochemical, Chemical, steam lines and process industries, where they have many advantages over older types of gaskets.

These gaskets are manufactured to international specifications such as BS, API, ASME, JIS and DIN standards. We also manufacture to as per customer’s specifications.