Germany berger s2b seals berger s2b model berger s2b price

berger s2b 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 inspection and pressure testing, the unit is mounted on the shaft within the seal chamber, fixed to the shaft with set screws, and the gland bolts are tightened. Once the cartridge positioning tabs are removed, the mechanical seal operates with parallel faces and is 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. Cassette seals are also a type of cartridge mechanical seal. In this design, 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.

berger s2b 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. 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's 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 rapidly decreases or even disappears; thus, the spring can continuously compensate for the oil seal's self-tightening force.

berger s2b seal usage guidelines

1) When the gearbox lubricating oil volume is ≤ 7 liters, the additive amount per liter of lubricating oil is 20‐30ml; 2) When the volume is 7‐15 liters, the additive amount is 15‐20ml per liter of lubricating oil; 3) When the volume is > 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 by oil, dust, or exposure to direct sunlight. 5) When shaft wear creates a "V" shaped groove, causing the contact pressure between the new oil seal lip and the shaft to drop and fail to seal oil, a displacement method can be used to compensate.

berger s2b seal specifications and applications

1) Standard single-lip type: Generally used for sealing mineral oil, water, and other media on high- and low-speed rotating shafts and in reciprocating motion. Standard oil seals are used in environments with little dust and impurities, resistant to media pressure< 0.05MPa, maximum linear speed 15m/s, reciprocating speed< 0.1m/s. 2) Standard double-lip type: In addition to the usage characteristics of the aforementioned S type oil seals, it also provides dust protection. Standard oil seals with a dust lip can prevent dust ingress, resistant to media pressure< 0.05MPa, linear speed ≤ 15m/s. 3) Spring-less type: Single-lip internal skeleton rubber oil seal without a spring. Generally suitable for low-speed conditions where the sealing medium is lubricating grease. Linear speed ≤ 6m/s. 4) External skeleton single-lip type: Single-lip external skeleton rubber oil seal with a spring. It has a thin waist, good followability, and good rigidity. Standard oil seals are used in environments with little dust and impurities, resistant to media pressure< 0.05MPa. For cases where the rotational axis linear speed is ≤ 15m/s. 5) External skeleton double-lip type: Double-lip external skeleton rubber oil seal with a secondary lip. It has a thin waist, good followability, high rigidity, and good concentricity. Standard oil seals with a dust lip can prevent dust ingress, resistant to media pressure< 0.05MPa. Rotational speed ≤ 15m/s. 6) Assembled single-lip type: An external skeleton oil seal formed by assembling inner and outer skeletons with rolled edges. It features high installation precision, fast heat dissipation, and heavy-load characteristics. Suitable for heavy-load conditions under high temperature and high speed, media pressure ≤ 0.05MPa, maximum linear speed ≤ 15m/s. 7) Unidirectional return flow type (right-hand, left-hand): Angled ribs are manufactured on the air side of the lip. Using fluid dynamics principles, it generates a unidirectional pumping action with a return flow effect. Related to the shaft's rotation direction, the return flow effect results in lower radial force compared to standard oil seals, reducing wear and heat generation, and extending service life. Suitable for media pressure< 0.05MPa, rotational speed ≤ 20m/s. 8) Pressure-resistant type: Short lip and short, thick waist, providing pressure resistance. Working pressure ≤ 3MPa. Suitable for applications with media pressure ≤ 3MPa, applicable as shaft end oil seals for high-pressure pumps. Generally, the PV value is ≤ 8. Rotational axis linear speed ≤ 15m/s.

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