German idg dichtungstechnik seals, idg dichtungstechnik models, idg dichtungstechnik prices

idg dichtungstechnik seals can be divided into two main categories: static seals and dynamic seals. Static seals mainly include gasket seals, sealant seals, and direct contact seals. Based on working pressure, static seals can be further divided into medium-to-low pressure static seals and high-pressure static seals. Medium-to-low pressure static seals commonly use gasket seals made of softer materials with wider widths, while high-pressure static seals use metal gaskets made of harder materials with very narrow contact widths. Dynamic seals can be divided into two basic types: rotary seals and reciprocating seals. Depending on whether the seal contacts the components moving relative to it, they can be classified as contact seals and non-contact seals; based on the seal and contact position, they can be divided into circumferential seals and face seals, with face seals also known as mechanical seals. Centrifugal seals and spiral seals in dynamic sealing achieve sealing by imparting kinetic energy to the medium during machine operation, hence they are sometimes referred to as hydrodynamic seals.

idg dichtungstechnik seal classification

Oil seals are generally divided into single-piece types and assembled types. The assembled type allows free combination of the cage and lip material, and is generally used for special oil seals. Oil seals can be categorized into various forms and names based on their sealing function, characteristics, structural type, operating state, and sealing mechanism. However, conventionally, rotary shaft lip seals are referred to as oil seals, while seals used for static sealing and dynamic sealing (generally reciprocating motion) are called seals. The representative form of an oil seal is the TC oil seal, which is a double-lip oil seal with a self-tightening spring fully encapsulated in rubber. Generally, when referring to oil seals, this type of tc cased oil seal is implied.

idg dichtungstechnik seal materials

Common materials for oil seals include: Nitrile rubber, Fluoroelastomer, 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): It has 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. It is suitable for operation in the temperature range of -30 to 150 degrees Celsius. 3) Fluoroelastomer: It offers aging resistance, heat resistance, and oil resistance, and is 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 exhibits significant permanent compression set. It is suitable for temperatures from -20 to 250 degrees Celsius. 4) Silicone rubber: It has outstanding high and low-temperature resistance. It can be used super-long term at 150 degrees Celsius without performance change; it can be used continuously at 200 for 10000h. It maintains its unique elasticity, ozone resistance, and weather resistance within the working temperature range of -70 to 260 degrees Celsius. 5) Polytetrafluoroethylene: It has outstanding chemical stability, thermal stability, friction reduction, and self-lubrication properties, with a decomposition temperature above 400. Therefore, it can operate normally within 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 fluoroelastomer are widely used oil seal materials. The former is low-cost, but the latter offers significant improvements in 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, so leakage phenomena remain 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 used: Nitrile rubber (NBR) is -40 to 120℃, Acrylate rubber (ACM) is -30 to 180℃, and Fluoroelastomer (FPM) is -25 to 300℃.

idg dichtungstechnik seal installation and shutdown

1) Before starting, keep the seal chamber filled with liquid. When transporting solidifying media, use steam to heat the seal chamber to melt the medium. Manual rotation must be performed before startup to prevent sudden startup from causing the soft ring to shatter. 2) For mechanical seals utilizing an external seal oil system, start the seal oil system first. Stop the seal oil system last after shutdown. 3) After stopping a hot oil pump, do not immediately stop the cooling water for the seal oil chamber and face seal. Wait until the oil temperature at the face seal drops below 80 degrees before stopping the cooling water to avoid damaging the seal parts.

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