Germany FIMI seals FIMI model FIMI price

FIMI seals utilize the "container" concept from transportation to create cartridge seals. The rotating and stationary parts of this seal are pre-assembled into a single unit before installation. After passing inspection and pressure testing, the unit is mounted on the shaft within the stuffing box, fixed to the shaft with set screws, and the gland bolts are tightened. Once the cartridge positioning tabs are removed, the mechanical seal is in a parallel face operating state and ready for service. This approach not only simplifies assembly but also ensures assembly quality. Welded metal bellows mechanical seals are all designed as cartridge seals, offering the aforementioned advantages. Cartridge seals are also a type of cartridge mechanical seal. In this seal, the stationary ring, rotating ring, sleeve, gland, and auxiliary seals are all assembled together on a single sleeve before installation, facilitating inspection of assembly quality. After passing inspection, simply tighten the seal cover and secure the screws. This pre-assembled, inspected, and tested seal component makes it easy to ensure installation and assembly quality.

FIMI 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 further 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 lip edge and the contraction force of the self-tightening helical spring exert a certain radial clamping 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.

FIMI 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 shaft diameter wear forms 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, the displacement method can be used for compensation.

FIMI 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 seal installation process, avoid sharp edges. Installing bore seals into integral grooves requires 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 assembly oil to both the seal groove and the seal surface. Install the seals gradually in sequence. Avoid sharp edges during installation, align the seal properly, and avoid twisting or skewing. If using a split groove, tighten the gland last.

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