Vertical three-screw pump adopts double seal mechanical seal and framework oil seal, no leakage.

立式三螺杆泵采用机械密封加骨架油封双重密封方式，无泄露。

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Mechanical seal: seal face, gasket and shaft seal, etc parts must be undamaged, otherwise will result in over leakage, sure to change parts with wear and tear or damage.

机械密封：密封面、密封垫及轴封等元件必须完好，否则将导致过度泄漏，对有磨损或损伤的元件必须更换。

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Mechanical seal repair process more complicated, after assembly to ensure no leakage of the mechanical seal, mechanical seal technology essential check size.

机械密封检修工艺较为复杂，要保证组装后的机械密封无漏泄，机械密封技术尺寸的校核必不可少。

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All that was needed to make a mechanical energy-storage system was a good enough rotational seal, so the flywheel could spin freely inside a vacuum chamber with no air resistance.

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