Germany TAPFLO seals TAPFLO model TAPFLO price

TAPFLO 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 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. Cartridge 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 easier to ensure installation and assembly quality.

TAPFLO seal principle

An oil film controlled by the oil seal lip exists between the oil seal and the shaft, providing fluid lubrication characteristics. Under the action of liquid surface tension, the stiffness of the oil film causes it to form a meniscus at the interface with air, preventing leakage of the working medium and thereby achieving sealing of the rotating shaft. The sealing capability of an oil seal depends on the thickness of the oil film on the sealing surface. If the film is too thick, the oil seal will leak; if too thin, dry friction may occur, causing wear on the oil seal and shaft. If there is no oil film between the sealing lip and the shaft, overheating and wear are likely. Therefore, during installation, some oil must be applied to the sealing ring, and the skeleton oil seal must be kept perpendicular to the shaft axis. If not perpendicular, the sealing lip will wipe the lubricating oil off the shaft, leading to excessive wear of the sealing lip. During operation, slight seepage of lubricant from the housing is ideal to maintain an oil film at the sealing surface.

TAPFLO seal function

The primary function of a skeleton oil seal is to isolate lubricated components from output components in transmission systems, preventing lubricating oil leakage. It is typically used on rotating shafts and is a type of rotating shaft lip seal. The skeleton acts like rebar in concrete components, providing reinforcement and allowing the oil seal to maintain its shape and tension. Based on the skeleton type, they can be classified as inner skeleton oil seals, outer skeleton oil seals, and exposed inner/outer skeleton oil seals. Skeleton oil seals are made from high-quality nitrile rubber and steel plates, offering stable quality and long service life. They are widely used in automobiles and motorcycles on crankshafts, camshafts, differentials, shock absorbers, engines, axles, front and rear wheels, and other parts. 1) Prevent sand, dust, water vapor, etc., from entering bearings from the outside; 2) Restrict lubricating oil leakage from bearings. Requirements for oil seals include dimensions (inner diameter, outer diameter, and thickness) that comply with specifications; appropriate elasticity to properly grip the shaft for sealing; heat resistance, wear resistance, high strength, media resistance (to oil, water, etc.), and long service life.

TAPFLO seal failure causes

Mechanical seal failures are generally identified only after phenomena such as abnormal leakage, abnormal wear, or abnormal torque occur. The causes of failure can be broadly categorized into four aspects: 1) Incorrect design or selection of the mechanical seal; 2) Poor quality of the mechanical seal; 3) The machine using or installing the mechanical seal does not meet precision requirements; 4) Incorrect machine operation.

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