German C Otto Gehrckens seals C Otto Gehrckens models C Otto Gehrckens prices

C Otto Gehrckens seals are sealing devices installed to prevent leakage between the pump shaft and the housing. Common types of shaft seals include packing seals, mechanical seals, and power seals. The shaft seal of a reciprocating pump is usually a packing seal. When transporting media where leakage is not permitted, a diaphragm reciprocating pump can be used. The shaft seals of rotary pumps (including vane pumps, rotor pumps, etc.) mainly include packing seals, mechanical seals, and power seals. The shaft seal of a reciprocating pump is usually a packing seal. When transporting media where leakage is not permitted, a diaphragm reciprocating pump can be used. The shaft seals of rotary pumps (including vane pumps, rotor pumps, etc.) mainly include packing seals, mechanical seals, and power seals.

C Otto Gehrckens seal classification

Seals can be divided into two major categories: static seals and dynamic seals. Static seals mainly include three types: gasket seals, sealant seals, and direct contact seals. According to working pressure, static seals can be further classified into medium- and low-pressure static seals and high-pressure static seals. Medium- and low-pressure static seals commonly use softer and wider gasket materials, while high-pressure static seals utilize harder metal gaskets with very narrow contact widths. Dynamic seals can be categorized into two basic types: rotary seals and reciprocating seals. Additionally, depending on whether the sealing element contacts the moving parts, they can be classified as contact seals or non-contact seals; based on the position of the seal and its contact area, they can also be divided into circumferential seals and face seals, with face seals also known as mechanical seals. Centrifugal seals and spiral seals in dynamic sealing rely on the power imparted to the medium during machine operation to achieve sealing, hence they are sometimes referred to as power seals.

C Otto Gehrckens seal usage guidelines

1) Select suitable seal materials and hydraulic oil, ensuring compatibility with operating temperatures and oil. 2) High geometric positional accuracy (concentricity) of parts sliding relative to the seal, good material quality (such as hard chrome plating), and fine surface roughness can extend service life. (1) For oil seals used on the shaft journals of hydraulic pumps and motors, the roughness of the sliding surface is required to be within Ra of 0.25m, and the surface must be hard chrome plated. In specific applications, the radial spring force of the oil seal lip needs to be appropriately adjusted to ensure proper tightness. During installation, an installation sleeve or thin shim should be used to protect the sealing ring to prevent the lip from rolling or twisting, which could cause the spring to slip out. (2) The inner surface of hydraulic cylinder barrels is commonly processed by roller burnishing, which not only improves surface roughness but also induces cold work hardening, helping to extend the service life of sealing rings. In addition, operating pressure, sliding surface length, and type significantly affect service life. Therefore, "scheduled inspection" intervals should be determined based on these conditions. (3) Requires good lubrication of the sealing surface and prevention of contaminant ingress. Using oil fluids that meet specified cleanliness grades and correct installation methods are also necessary conditions. Seal storage: 1). The recommended storage room temperature for seals is below 30℃ to avoid high-temperature aging; 2). Seals must be stored in sealed packaging to avoid contact with moisture or dust in the air; 3). Seals must be kept away from strong light exposure to avoid erosion by ozone in the air or premature aging. The performance factors affecting various seals differ; for example, factors affecting mechanical seals (packing seals, etc.) include temperature, medium, wear, and pressure endured.

C Otto Gehrckens seal maintenance

1) Control of shaft seal pressure: High shaft seal pressure can easily cause steam leakage from the shaft seal, leading to water ingress into the oil and deterioration of turbine oil quality. Excessively high shaft seal pressure will trigger the action of the equalizing box safety valve, wasting working fluid and damaging equipment. Too low shaft seal pressure may cause a drop in unit vacuum, allowing cold air to enter the shaft seal or even the cylinder, causing cooling of the shaft seal section or inside the cylinder, seriously threatening equipment safety. 2) Impact of abnormal shaft seal temperature on the unit: When the shaft seal temperature is too high, especially before unit startup, excessive heat causes intense heating at the shaft end steam seal and rotor steam seal sections, resulting in local stress concentration and certain deformation. This may change the clearance between the rotor and the cylinder, increase steam leakage from the shaft seal, increase differential expansion, and potentially cause serious rubbing between stationary and rotating parts. When the shaft seal temperature is too low, the shaft end steam seal and rotor steam seal sections are cooled, similarly causing local stress concentration, changing the clearance between the cylinder and the rotor, increasing steam leakage at the shaft end, and decreasing differential expansion. Low shaft seal temperature may also result in water carryover in the shaft seal supply steam, causing water hammer in the shaft seal supply pipeline. In severe cases, this can lead to water ingress into the turbine.

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