Spiral wound seals - types and advantages

Spiral wound seals are made of various sealing materials in different variants with or without metal auxiliary rings. These seals are particularly suitable for flange joints with variable pressures and temperatures and can withstand temperatures up to 1000 °C depending on the material used.

The inner ring protects the seal material from overheating, impurities from the medium and also reduces turbulence of the medium in the pipe. The outer ring centres the seal in the flange and prevents damage during tightening.

Benefits

1. High blowout resistance (up to 320 bar).
2. Can be used over a wide pressure and temperature range.
3. Easy to install due to its design.
4. SWG-IOR eliminates installation errors.
5. Easy removal during disassembly due to non-stick surface.
6. No damage to the flange surface.

Product Variants

Basic types according to DIN, BS, API and ANSI standards. See the material data sheet for an overview of available dimensions.

1. POWERgasket SWG - ringless gasket.
2. POWERgasket SWG-IR - seal with inner ring.
3. POWERgasket SWG-OR - seal with outer ring.
4. POWERgasket SWG-IOR - seal with inner and outer ring.

Sealing materials

• The spiral part of the seal is made by simultaneously winding the steel strip and the sealing material. The sealing material is usually expanded graphite, PTFE, ceramic or mica.
• Ceramic or mica is designed for extremely high temperatures and should be combined with graphite to obtain better joint tightness.

Ring materials