German intertechnik elze seals, intertechnik elze models, intertechnik elze prices

intertechnik elze seals are materials or components that prevent leakage of fluids or solid particles from adjacent mating surfaces and prevent external contaminants such as dust and moisture from entering machinery. The recommended storage temperature for seals is below 30°C to avoid high-temperature aging. Seals are classified into static seals and dynamic seals. Their main function is to prevent leakage of fluids or solid particles from adjacent mating surfaces and to prevent external contaminants such as dust and moisture from entering machinery. Static sealing refers to tightly sealed chambers and containers; stamps used for sealing letters and wills.

intertechnik elze seal classification

Oil seals are generally divided into single-piece types 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 condition, and sealing mechanism, oil seals can be categorized into various forms with different names. However, conventionally, rotary shaft lip seals are referred to as oil seals, while static seals and dynamic seals (generally for reciprocating motion) are called sealing elements. The representative form of an oil seal is the TC oil seal, which is a double-lip oil seal fully encapsulated in rubber with a self-tightening spring. The term 'oil seal' commonly refers to this type of tc caged oil seal.

intertechnik elze seal materials

Common materials for oil seals include: Nitrile rubber, Fluorocarbon rubber, Silicone rubber, Acrylate rubber, Polyurethane, Polytetrafluoroethylene, etc. 1) Nitrile rubber (NBR): It offers good heat and wear resistance, and resistance to various lubricating oils, greases, and oil-gas mixtures. Applicable temperature range: -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 low-aniline-point mineral oils. 2) Acrylate rubber (ACM): Superior oil and heat resistance, wear resistance, ozone resistance, and UV radiation resistance. Especially resistant to lubricating oils, gear oils, motor oils, engine oils, and petroleum-based hydraulic fluids containing extreme pressure agents. Suitable for operating temperatures from -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 (PTFE): Outstanding chemical stability, thermal stability, friction reduction, and self-lubrication. Its decomposition temperature is above 400 degrees Celsius. 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 significantly improved temperature resistance and sealing performance, though at a higher cost. It still retains some common disadvantages 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, compatibility with the working medium, adaptability to the operating temperature range, and the lip's ability to follow the rotating shaft at high speeds must be considered. Generally, the lip temperature of an oil seal during operation is 20 to 50°C higher than the working medium temperature, which should be noted during material selection. The operating range of an oil seal depends on the material: Nitrile rubber (NBR) is -40 to 120°C, Acrylate rubber (ACM) is -30 to 180°C, and Fluorocarbon rubber (FPM) is -25 to 300°C.

intertechnik elze 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 and the mating parts of the mechanical seal are as follows: 1) Shaft runout: Maximum not greater than 0.05 mm; 2) Rotor wobble: Near the shaft sleeve at the dynamic ring seal, not greater than 0.06 mm; 3) Axial shaft movement must not exceed ±0.5 mm. If a shaft sleeve is present, it 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; (conventional practice: face runout<0.05, radial runout<0.10) 5) Concentricity tolerance of the gland (static ring seat) and the sealing spigot relative to the shaft centerline: 0.05 mm. Perpendicularity tolerance of the surface contacting the gasket relative to the centerline: 0.03 to 0.05 mm. If requirements are not met, the seal chamber must be machined; 6) The ends of the shaft sleeve where the dynamic ring seal is installed, and the ends of the gland (or housing) where the static 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 integrity of the contact surfaces.

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