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泛塞封是一種U型鐵氟龍內裝特殊彈簧的高性能密封件，由適當的彈簧力加上系統流體壓力，將密封唇（面）頂出而輕輕壓住被密封的金屬面以生成非常優異的密封效果。彈簧的致動效應可以克服金屬配合面的輕微偏心以及密封唇的磨耗，而持續保有預期的密封性能。
鐵氟龍（PTFE）是一種耐化學性比全氟橡膠優異，耐熱性良好的密封材料，可應用于絕大多數的化學流體、溶劑、以及液壓油、潤滑油，其膨潤性很小故可長期發揮密封性能，利用各種特殊彈簧來克服鐵氟龍或其他高性能橡膠塑料的彈性問題，開發出可替換絕大數應用于靜態或動態（往復或旋轉運動）的密封件，使用溫度范圍可由冷媒至300℃，壓力由真空至超高壓力700kg移動速度高達20m／s，而彈簧可因應不同的使用環境，選用不銹鋼、Elgiloy Hastelloy等，故可應用于各種高溫腐蝕流體的場合。
The Variseal is a high-performance, U-shaped PTFE seal with a special built-in spring, which achieves excellent sealing through the appropriate elasticity plus the system fluid pressure to push out the sealing lip (surface) and gently press the metal surface sealed. The actuating effect of the spring can overcome the slight eccentricity of the metal mating surface and wear of the sealing lip to continuously maintain the desired sealing performance.
PTFE is a sealing material with better chemical resistance than perfluoro rubber and good heat resistance to be applicable in most chemical fluids, solvents, hydraulic fluids and lubricants, as well as very small swellability to ensure long-term sealing performance. We use various special springs to overcome the elasticity problem of PTFE or other high-performance rubber and plastics and develop seals that can replace a vast number of seals applied in static or dynamic (reciprocating or rotary) motions in temperature ranging from refrigerant temperature to 300°C and under pressure ranging from vacuum to ultra-high pressure of 700kg while moving at a speed up to 20m/s. Depending on different environments, we choose stainless steel, Elgiloy, Hastelloy, etc. for seals applied in various high-temperature corrosive fluids.
