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弹簧蓄能（张力）密封圈工作原理
弹簧蓄能密封圈（泛塞封）是由聚合材料密封壳和耐腐蚀的不锈钢金属弹簧组成。密封圈安装在沟槽内，弹簧受压，形成向外的张力，促使密封唇紧贴密封沟槽，由于弹簧给密封唇提供弹力，能弥补密封壳磨损和配合零件的偏心，由此形成从真空到低压范围内的密封。另外系统压力会辅助弹簧蓄能，压力越大，密封唇与沟槽贴合的越充分，由此形成高压密封。
密封壳是由PTFE、填充PTFE、PEEK、填充PEEK、PVDF、PPS或其它高性能的聚合材料经机械加工制成，材料决定了弹簧蓄能密封圈适用于从-268℃到+427℃温度范围内，密封几乎所有的液体、化学制品和气体。并且可以无限贮存，不存在老化问题。
金属弹簧有多种形式可供选择，有O型弹簧，V型弹簧，U型弹簧，满足不同运动形式的密封要求。在有些场合可由不同材质的O形圈替代金属弹簧做为弹性体使用。
弹簧蓄能密封圈的应用领域：
——泵、阀、压缩机
——制药设备、食品设备、医疗仪器
——石油、精细化工工业
——回转接头制造业
——半导体制造设备
——液相色谱仪
——航天、航空工业

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