Germany albis seals albis models albis prices

albis 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 made as cartridge seals, offering the aforementioned advantages. Cassette 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 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.

albis seal classification

Oil seals are generally divided into single-piece and assembled types. Assembled types allow free combination of the cage and lip material, typically used for special oil seals. Based on sealing function, characteristics, structural type, operating state, and sealing mechanism, oil seals can be categorized into various forms and names. However, by convention, rotary shaft lip seals are referred to as oil seals, while static seals and dynamic seals (generally reciprocating motion) are called seals. The representative form of an oil seal is the TC oil seal, which is a rubber-covered double-lip oil seal with a garter spring. The term "oil seal" commonly refers to this type of tc caged oil seal.

albis seal materials

Common materials for oil seals include: Nitrile rubber, Fluorocarbon rubber, Silicone rubber, Acrylate rubber, Polyurethane, Polytetrafluoroethylene, etc. 1) Nitrile rubber (NBR): It has good heat and wear resistance, and is resistant to various lubricating oils, greases, and oil-gas mixtures. The applicable temperature range is -30 to 120 degrees Celsius. However, it cannot be used in phosphate ester hydraulic fluids or gear oils containing extreme pressure additives. It performs stably in gasoline and mineral oils with low aniline points. 2) Polyacrylate rubber (ACM): Superior oil and heat resistance, wear resistance, ozone resistance, and UV radiation resistance. It is especially resistant to lubricating oils, gear oils, motor oils, engine oils, and petroleum-based hydraulic fluids containing extreme pressure agents. Suitable for operation in the range of -30 to 150 degrees Celsius. 3) Fluorocarbon rubber: Resistant to aging, heat, and oil. Suitable for almost all lubricating oils, fuel oils, and gasoline. It does not harden easily in oils containing extreme pressure additives. However, it has poor cold resistance and high-temperature wear resistance, and significant permanent compression set. Suitable for temperatures from -20 to 250 degrees Celsius. 4) Silicone rubber: Outstanding high and low-temperature resistance. Can be used long-term at 150 degrees Celsius without performance change; can be used continuously at 200 for 10000h. Maintains its unique elasticity, ozone resistance, and weather resistance in the working temperature range of -70 to 260 degrees Celsius. 5) Polytetrafluoroethylene: Outstanding chemical stability, thermal stability, friction reduction, and self-lubrication. Its decomposition temperature is above 400. Therefore, it can operate normally in the temperature range of -200 to 300 degrees Celsius. Except for free fluorine and alkali metals, it has excellent corrosion resistance to chemicals, solvents, hydroxides, and acids. Nitrile rubber and fluorocarbon rubber are widely used oil seal materials. The former is low-cost, but the latter offers significant improvements in temperature resistance and sealing, though at a higher cost. It still retains some negative commonalities of ordinary rubber materials, such as poor wear resistance, short service life, and high sensitivity to shaft eccentricity, making leakage relatively common. PTFE oil seals are high-tech products and represent the future direction of oil seal development [2]. When selecting oil seal materials, one must consider the material's compatibility with the working medium, adaptability to the working temperature range, and the lip's ability to follow the rotating shaft at high speeds. Generally, the lip temperature of an oil seal during operation is 20 to 50℃ higher than the working medium temperature, which should be noted when selecting materials. The operating range of an oil seal depends on the material: Nitrile rubber (NBR) is -40 to 120℃, Acrylic rubber (ACM) is -30 to 180℃, and Fluorocarbon rubber (FPM) is -25 to 300℃.

albis seal installation technical requirements

Mechanical seals are high-precision mechanical components, and correct installation and operation significantly impact their service life. We generally follow the standards specified by the Ministry of Petrochemical Industry. The technical requirements for the pump installing the mechanical seal and the mating parts are as follows: 1) Shaft bending: Maximum not greater than 0.05 mm; 2) Rotor runout: Near the shaft sleeve at the rotating ring seal location, not greater than 0.06 mm; 3) Axial shaft movement must not exceed ±0.5 mm. If a shaft sleeve is present, the sleeve must not be loose; 4) Coupling alignment error: For gear couplings, not greater than 0.08 to 0.10 mm (P2008C); for elastic couplings, not greater than 0.05 to 0.06 mm; (Customary practice: axial runout<0.05, radial runout<0.10) 5) Concentricity tolerance of the gland (stationary ring seat) and the seal mating rabbet relative to the shaft centerline is 0.05 mm. Perpendicularity tolerance of the surface contacting the gasket relative to the centerline is 0.03 to 0.05 mm. If requirements are not met, the seal chamber must be machined; 6) The end of the shaft sleeve where the rotating ring seal is installed, and the end of the gland (or housing) where the stationary ring seal is installed, should be chamfered and smoothed. 7) Be careful when installing or removing mechanical seals. Do not use hammers or flat chisels to avoid damaging seal components. If scale prevents removal, clean thoroughly before disassembly. 8) If mechanical seals are used on both ends of the pump, coordinate during assembly and disassembly to avoid neglecting one side. 9) For mechanical seals that have been in operation, if gland loosening causes seal movement, the stationary and rotating ring components must be replaced. Do not simply retighten and continue use. Loosening changes the original running track of the friction pair, easily compromising the sealing of the contact surfaces.

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