Working Principle of Spring Energized (Tension) Seal Rings
The spring energized seal ring (Variseal) consists of a polymeric seal housing and a corrosion-resistant stainless steel spring. The seal ring installed in the groove forms outward tension under spring pressure to bond the sealing lip to the sealing groove and achieves sealing ranging from vacuum to low pressure through the permanent supply of elasticity from the spring to the sealing lip to make up for wear of the seal housing and eccentricity of coordinated parts.
The seal housing is machined from PTFE, filled PTFE, PEEK, filled PEEK, PVDF, PPS or any other high performance polymeric material, which decides that the seal rings are applicable in temperature ranging from -268°C to +427°C for sealing of almost all liquids, chemicals and gases. What’s more, the seal rings can be stored for unlimited period without aging.
There are various forms of metal springs for your options, including O-shaped springs, V-shaped springs and U-shaped springs to meet sealing requirements of different movement forms. In some occasions, O-rings made of different materials may replace metal springs as elastomers.
Application Areas of Spring Energized Seal Rings:
- Pumps, valves and compressors
- Pharmaceutical equipment, food equipment and medical equipment
- Petroleum and fine chemicals industries
- Rotary joint manufacturing industry
- Semiconductor manufacturing equipment
- Liquid chromatography
- Aerospace and aviation industries