German Elektror seals Elektror models Elektror prices

Elektror seals are a customary term for general seals, simply referring to lubricating oil seals. They are mechanical components used to seal grease (oil is the most common liquid substance in transmission systems, and also refers to general liquid substances), isolating the parts requiring lubrication in the transmission components from the output parts to prevent lubricating oil leakage. Seals used for static sealing and dynamic sealing (generally reciprocating motion) are called oil seals. The representative form of oil seals is the TC oil seal, which is a double-lip oil seal with a self-tightening spring fully covered by rubber. The term oil seal generally refers to this type of tc cased oil seal.

Elektror seal types

1) Compression seals: Compression seals, especially O rings, have been widely used in seals. Other types such as X, T, D, square, and triangular shapes are suitable for different applications. The direction of improvement is to make their sealing performance stable and reliable, improve their pressure resistance, and reduce friction. They can also be combined with low-friction plastics such as PTFE and nylon slide rings and support rings to form combination seals, improving pressure resistance and reducing friction. Some manufacturers' products are permitted to reach speeds of 7.5m/s and sealing pressures of 5.6MPa. 2) Reciprocating lip seals: Reciprocating lip seals, also known as lip gaskets or cup seals, are widely used for dynamic sealing in hydraulic system reciprocating cylinders. The pressure-bearing surface of this seal is lip-shaped, with a very small interference fit during installation, allowing the lip edge to fully contact the sealing surface to create a seal. When the cylinder operates, as the pressure increases, the contact force and contact area increase, thereby improving the sealing performance. During the cylinder return stroke, the pressure decreases, and the contact area and friction are lower than during the working stroke, creating a breathing effect that lubricates the lip. There are many types of reciprocating dynamic seals, commonly including J, L, U, V, and Y types. There are also various combination and composite seals, such as bellows, bud-shaped, and multi-lip seals. Extrusion must be prevented under high pressure by selecting materials with sufficient tear strength, hardness, and modulus, or by using support rings for protection, or by using reinforced elastomers. Seals used under high pressure, high speed, or high temperature often use composite combination seals. Their common feature is having two lips in contact with the cylinder wall. A groove is provided in the middle of the sealing area to store media, improving lubrication, reducing lip wear, and ensuring reliable sealing. Lip seals used in pneumatic systems are required to operate in an unlubricated state, with contact pressure; some integrate dust wipers with the seal structure. 3) Rotary shaft lip seals: There are no fewer than 200 varieties of similar structures, such as hydrodynamic type, inner-cased skeleton, assembled type, outer-exposed skeleton, bonded PTFE AF type, dual-modulus return flow type, etc. The advantage of the outer-exposed skeleton assembled type is accurate positioning, high concentricity, and good heat dissipation conditions. It is stable under pressure and vibration, resulting in a longer service life while saving rubber material. The dual-modulus return flow type applies wave seal theory, achieving a return flow effect by adding a low-modulus, easily deformable material at the sealing contact area, which also reduces product design and mold processing costs. Joints between rigid waterproof layers and gable walls, parapet walls, and protruding roof structures should be properly treated (with flexible sealing).

Elektror seal influencing factors

Hydraulic seals play a crucial role in the integrity of hydraulic and pneumatic systems. If the seals of a hydraulic or pneumatic component are not up to standard, the component itself is not considered a good product. Many factors affect seals. First, pressure is an important factor affecting seal quality; the level of pressure and the duration of pressure cycle changes significantly impact seal damage (such as extrusion). The higher the pressure, the greater the impact of other factors on seal performance, such as temperature, speed, seal material, the gap between the piston and cylinder barrel, and the gap between the piston and cylinder head. Another factor is temperature and friction. It is difficult to describe the maximum and minimum operating temperatures for a seal material because this is the result of a combination of factors. The operating temperatures for pistons and piston rods differ, so they must be selected accordingly. Another factor is the surface roughness of the seal product; surface characteristics, pressure, media, temperature, seal material, seal type, and motion speed all influence seals. Finally, surface treatment is critical. Experience shows that the surface characteristics of cylinder pistons and piston rods have a significant impact on seal life. Surface characteristics are commonly defined by the RA value, where RA is the arithmetic mean of the absolute values of the surface profile deviations from the centerline. However, these values do not fully represent the impact of surface conditions on seals, because even with the same roughness, different surface shape characteristics can lead to varying degrees of seal wear.

Elektror seal installation precautions

1) Pay close attention during installation to avoid installation deviations. Tighten the gland after aligning the coupling. Bolts should be tightened evenly to prevent tilting of the gland face. Check each point with a feeler gauge; the error should not exceed 0.05 mm. Check the mating clearance (i.e., concentricity) between the gland and the outer diameter of the shaft or shaft sleeve; it should be uniform around the circumference. Check each point with a feeler gauge; the allowable error should not exceed 0.01 mm. 2) The spring compression amount must be performed according to regulations. Excessive or insufficient compression is not allowed; the required error is 2.00 mm. Excessive compression increases the specific face pressure, accelerating face wear. Insufficient compression results in inadequate specific pressure, failing to achieve a seal. 3) After installing the rotating ring, it should automatically spring back when pressed against the spring. 4) Installation position requirements: To ensure stable operation, long life, and low leakage performance of the mechanical seal, it is very important to install it correctly on the machine. When installing the mechanical seal on the machine, compare it carefully with the general assembly drawing before installation to confirm that all parts are ready. At this time, pay attention to any abnormalities such as scratches or defects on the sealing faces of the friction pair and sealing rings. Also check for scratches on the surfaces of the shaft or shaft sleeve, flanges, and other components that come into contact with packing and sealing rings (O rings). If any abnormalities are found, they must be replaced or repaired before use. During actual installation, do not bring more parts than necessary to the site. Thus, if there are remaining parts after installation, it indicates that some parts were missed during installation; if parts are insufficient, it means that parts were assembled in unnecessary places, serving as a self-check during installation.

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