Spring Seal/ spring energized seal/ Variseal is a high-performance sealing element with special spring inside U-shaped Teflon. With proper spring force and system fluid pressure, it pushes out the sealing lip (face) and gently presses the sealed metal face to generate excellent sealing effect. The actuating effect of the spring can overcome the slight eccentricity of the metal mating surface and the wear of the sealing lip, and the expected sealing performance can be maintained.

Spring energized seals are designed to be used in a wide range of applications and provide improved sealing performance where conventional seals may fail such as high/low speeds, wide temperature ranges and/or contact with corrosive media.