What is a spiral wound gasket?
A spiral wound gasket is a spiral made up of a preformed metal strip and filled with a soft material that provides sealing.
- When the gasket is compressed (tightened), the soft part fills in the imperfections of the flange and the metal part provides the mechanical resistance.
- The seal is achieved through the combination of flexibility and fluidity of the “V” shape of the metal strip and the filling formed during the compression phase.
- The combination of these two types of materials makes spiral wound gaskets an ideal product for sealing fluids at high temperatures (up to 1000ºC) and in high pressure conditions. strong> (up to 250ºC)
Types of Spiral Wound Gaskets
- Type R: soft material (WITHOUT metal strips)
- Type IR: soft material + inner metal strip
- Type CG: soft material + external metallic strip
- Type CGI: inner metal strip + soft material + outer metal strip.
The outer metal strip is usually made of carbon steel and its function is to center it on the flange.
The inner ring helps to avoid internal stresses. Since it is in contact with the fluid, it must be made of the same material as the spiral strip and compatible with said fluid.
For the filling material we recommend the use of graphite, temperatures of up to 550ºC / -200ºC in most cases.
Uses of Spiral Wound Gaskets
- High temperature and pressure services
- Petrochemical Industry
- Aircraft Industry
- Aerospace Industry
- Refineries, Chemicals and Steelworks
Metal Strip Materials
- Carbon steels
- Stainless Steels 304, 304L, 309, 316L, 316Ti, 321, 347
- Aluminum
- Silver
- Copper
- Nickel 200
- Monel 400
- Inconel 600
- Incoloy 800, 825
- Hastelloy B2, C276
- Titanium
Coating Materials
- Graphite
- PTFE
- Silver
Measurements for FLANGES
- API
- BS, 1560, 3293, 4504
- DIN
- MSSS-SP44
- Taylor Forge
Manufacturing Rules
- API, 601, 605
- DIN 2690, 2691
- BS 1560, 3293, 4504
