Spiral Wound Gaskets are composed of a metallic continuous strip with a special shaped profile, coupled with a continuous filling strip (Asbestos, PTFE, Graphite etc.) evenly wound in concentric spiral under constant stress. The Spiral Wound Gaskets are reinforced on the inner and outer diameter by winding of several electrically welded metal.

The main property of Spiral Wound Gasket, owing to elastic action of the special metallic strip profile, is that of offering a perfect sealing under fluctuating pressure and temperature conditions & maintaining tight elastic recovering. This elasticity can be modified by a proper selection of components. A proper selection of materials (both metal and fillers) allows the spiral gasket to accommodate the most varied operating conditions.

Spiral Gaskets are made as per ASME B16.20 to suit ASME B16.5 flanges and as per "A" Series and "B" Series to suit ASME B16.47 flanges. We also make spiral as per DIN 2632-2638, IS Standards, etc.

The material of construction of Spiral Wound Gaskets are as per annexure :

NOMINAL

3.2mm

4.5mm

ANNEXURE

Filler Material	Recommended Maximum Temperature
PTFE	2600C
CAF	4400C

Winding Material	Recommended Maximum Temperature
304 Stainless Steel	650°C
304L Stainless Steel	650°C
316 / 316L Stainless Steel	650°C
316Ti Stainless Steel 347 Stainless Steel 321 Stainless Steel	650°C
347 Stainless Steel	650°C
321 Stainless Steel	650°C

Notes :
  1.Inner Rings are required for all PTFE filled gasket.
  2.Gaskets OD Tolerance for NB 15 to NB 200 ±0.762.
  3.Gaskets ID Tolerance for NB 15 to NB 200 ±0.406mm, NB 250 to NB 600 ±0.762mm.
  4.Center ring OD Tolerance is ±0.762mm.
  5.Inner ring thickness 2.97mm to 3.33mm.
  6.Inner ring inside diameter tolerance is for NB 32 to NB 80 ±0.762mm, NB 100 to NB 600 +1.524mm.

Note: As the company's products are used for a multiplicity of purposes and as the company has no control over the method of their application or use, the company excludes all conditions or warranties, expressed or implied by statue or otherwise, as to their products and / or their fitness for any particular purpose. Any technical co-operation between the company and the customer is given for the customer's assistance only and without liability on the part of the company.

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Spiral wound metallic gaskets

ANNEXURE

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