Germany SIEMENS seals SIEMENS model SIEMENS price

SIEMENS 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, the gland bolts are tightened, and the cartridge positioning tabs are removed, allowing the mechanical seal to operate in a parallel face condition and begin running. This not only simplifies assembly but also ensures assembly quality. Welded metal bellows mechanical seals are all made as cartridge seals, possessing 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. Once inspection is passed, 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.

SIEMENS 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 "interference fit." Therefore, after the oil seal is installed into the seal housing and onto the shaft, the pressure from the seal lip 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.

SIEMENS seal usage instructions

1) When gearbox lubricating oil volume is ≤7 liters, the additive amount per liter of lubricating oil is 20‐30ml; 2) 7‐15 liters, the additive amount is 15‐20ml per liter of lubricating oil; 3) >15 liters, the additive amount is 10ml per liter of lubricating oil; 4) Oil seals not in temporary use should be stored properly to prevent contamination with oil stains, dust, or exposure to 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, the displacement method can be used to compensate.

SIEMENS seal installation precautions

1) During installation, pay close attention to avoiding installation deviations. Tighten the gland after aligning the coupling. Bolts should be tightened evenly to prevent tilting of the gland face. Check each point with a feeler gauge; the error must not exceed 0.05 mm. Check the mating clearance (i.e., concentricity) between the gland and the outer diameter of the shaft or sleeve; it must be uniform around the circumference. Check each point with a feeler gauge; the permissible error must not exceed 0.01 mm. 2) Spring compression must be performed according to regulations; excessive or insufficient compression is not allowed. The required error is 2.00 mm. Excessive compression increases face specific pressure, accelerating face wear. Insufficient compression results in inadequate specific pressure, failing to achieve a seal. 3) After installing the rotating ring, pressing it against the spring should allow it to spring back automatically. 4) Installation position requirements: To ensure stable operation, long service life, and low leakage performance of the mechanical seal, correct installation on the machine is crucial. When installing the mechanical seal on the machine, carefully compare it with the general assembly drawing before installation to confirm that all parts are ready. At this stage, check for abnormalities such as scratches or damage on the sealing faces of the friction pair and sealing rings. Also check for scratches on the surfaces of the shaft or sleeve contacting packing, sealing rings (O rings), flanges, and other components. If any abnormalities are found, they must be replaced or repaired before use. During actual installation, do not bring more parts to the site than needed. If there are leftover parts after installation, it indicates missing components during installation; if parts are insufficient, it means unnecessary parts were assembled, thereby serving as a self-check during installation.

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