Germany MAAGTECHNIC seals MAAGTECHNIC models MAAGTECHNIC prices

MAAGTECHNIC 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 easy to ensure installation and assembly quality.

MAAGTECHNIC seal features

1) No need to measure the seal working length during installation; 2) The shaft can be adjusted at any time; 3) No leakage occurs at startup because the seal has been pre-tested; 4) During installation, only the seal cover bolts need to be fitted and tightened, making assembly quality easy to ensure; 5) Protects the sealing faces from contamination by debris or damage due to operational errors before installation or startup; 6) Can be readjusted after thermal expansion of the machinery; 7) Self-centering through fit; 8) Seals can be easily removed for cleaning and inspection without disassembling the pump or equipment. The API682 standard recommends the use of cartridge mechanical seals for all mechanical seals.

MAAGTECHNIC seal startup preparation

1) Conduct a comprehensive inspection to ensure the mechanical seal, auxiliary devices, and piping are fully installed and comply with technical requirements. 2) Perform a static pressure test before starting the mechanical seal to check for leaks. If significant leakage is observed, identify the cause and eliminate it. If the issue persists, disassemble, inspect, and reinstall. The static test pressure is generally 2~3 kg/cm². 3) Rotate the pump manually in the direction of rotation to check for smooth and uniform movement. If rotation is difficult or stuck, check for incorrect assembly dimensions or improper installation.

MAAGTECHNIC seal precautions

1) Obtain the specified quantity of oil seals. 2) Keep the oil seals clean from receipt through assembly. 3) Before assembly, inspect the oil seals. Measure all dimensions of the skeleton oil seal to ensure they match the shaft and housing dimensions. Before installing the skeleton oil seal, clearly verify that the shaft diameter matches the inner diameter of the oil seal. The internal dimensions of the housing must suit the outer diameter width of the oil seal. Check the lip of the skeleton oil seal for damage or deformation, and ensure the spring has not fallen off or rusted. Prevent the oil seal from being stored flat during transport, which can subject it to external squeezing and impact, compromising its roundness. 4) Perform machining inspections before assembly. Verify that all housing and shaft dimensions are correct, especially the internal chamfer, which must not have a slope. The shaft and housing end faces must be machined smoothly. Chamfers must be free of damage and burrs. Clean the assembly area. Ensure there are no burrs, sand, iron chips, or other debris at the shaft insertion point (chamfer), as these can cause irregular damage to the oil seal lip. It is recommended to use an r angle for the chamfer. 5) Use manual touch to check for smoothness and true roundness. 6) Do not remove the packaging paper from the skeleton oil seal too early before installation to prevent debris from adhering to the seal surface and entering service. 7) Before installation, apply an appropriate amount of lithium-based grease with molybdenum disulfide between the lips of the skeleton oil seal to prevent dry grinding of the lip during momentary shaft startup, which affects the lip interference fit. Assemble promptly. If the oil seal housing with the installed seal is not immediately mounted, cover it with a cloth to prevent foreign matter from adhering to the seal. Hands or tools applying the lithium grease must be clean. 8) Install the skeleton oil seal flat; do not tilt it. It is recommended to use hydraulic equipment or a sleeve tool for installation. Do not apply excessive pressure; maintain uniform and slow speed. 9) Mark the machine where the skeleton oil seal is installed for tracking purposes, and carefully monitor the entire process.

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