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Hanovia seals are devices that prevent fluid leakage, consisting of at least one pair of end faces perpendicular to the axis of rotation. These faces remain in contact and slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism, along with the assistance of auxiliary seals. Mechanical seals where the elastic loading mechanism and auxiliary seal are metal bellows are referred to as metal bellows seals. In light-duty seals, rubber bellows are sometimes used as auxiliary seals; since the elastic force of rubber bellows is limited, springs are generally required to supplement the loading force. Mechanical seals are commonly abbreviated as "mech seals".

Hanovia seal construction

The skeleton oil seal structure consists of three parts: the seal body, the reinforcing skeleton, and the self-tightening helical spring. The seal body is divided into sections such as the bottom, waist, cutting edge, and sealing lip depending on the location. Typically, in its free state, the inner diameter of a skeleton oil seal is smaller than the shaft diameter, meaning it has a certain amount of "interference fit." Therefore, after the oil seal is installed in the seal housing and on the shaft, the pressure from the seal's cutting edge and the contraction force of the self-tightening helical spring exert a certain radial tightening force on the shaft. After a period of operation, this pressure will rapidly decrease or even disappear; thus, the spring can compensate for the oil seal's self-tightening force at any time.

Hanovia seal usage instructions

1) When the gearbox lubricating oil volume is ≤ 7 liters, the additive amount per liter of lubricating oil is 20‐30ml; 2) When 7‐15 liters, the additive amount is 15‐20ml per liter of lubricating oil; 3) When >15 liters, the additive amount is 10ml per liter of lubricating oil; 4) Oil seals not in immediate use should be stored properly to prevent contamination with oil, dust, or exposure to direct sunlight. 5) When the shaft diameter wears into a "V" shaped groove, causing the contact pressure between the new oil seal lip and the shaft to drop so that it can no longer seal oil effectively, a shift method can be used to compensate.

Hanovia seal precautions

1) Before designing grooves, please carefully read the product descriptions for each series to distinguish whether the product uses an integral groove or a split groove. During the installation of seals, avoid sharp edges. Installing bore seals into integral grooves requires the use of installation tools. Designers must consider parameters such as groove dimensional accuracy, surface roughness, and extrusion gap. For details, please refer to the product usage instructions, diagrams, and dimension tables. 2) Before installing seals, ensure there are no impurities or cracks in the seal groove. Apply operating oil to both the seal groove and the seal surface. Install the seals gradually in sequence. Avoid sharp edges during installation, align the seals correctly, and avoid twisting or skewing. If using a split groove, tighten the pressure cover last.

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