Germany E+L seals E+L model E+L price

E+L seals are a type of friction seal or stuffing box used to prevent liquid leakage between the shaft and bearing of compressors or other fluid handling equipment. They are also sealing devices installed to prevent leakage at the pump shaft and housing. Common types of shaft seals include packing seals, mechanical seals, and hydrodynamic seals. The shaft seal of a reciprocating pump is typically 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 consist of packing seals, mechanical seals, and hydrodynamic seals.

E+L seal construction

The skeleton oil seal structure consists of three parts: the seal body, the reinforcing skeleton, and the self-tightening helical spring. The seal body is divided into sections such as the bottom, waist, cutting edge, and sealing lip depending on the location. Typically, in its free state, the inner diameter of a skeleton oil seal is smaller than the shaft diameter, meaning it has a certain amount of "interference fit." Therefore, after the oil seal is installed into the seal housing and onto the shaft, the pressure from the seal's cutting edge and the contraction force of the self-tightening helical spring exert a certain radial tightening force on the shaft. After a period of operation, this pressure will rapidly decrease or even disappear; thus, the spring can compensate for the oil seal's self-tightening force at any time.

E+L seal usage instructions

1) When the gearbox lubricating oil volume is ≤ 7 liters, the additive amount per liter of lubricating oil is 20‐30ml; 2) When 7‐15 liters, the additive amount is 15‐20ml per liter of lubricating oil; 3) When >15 liters, the additive amount is 10ml per liter of lubricating oil; 4) Oil seals that are not temporarily in use should be stored properly to prevent contamination with oil stains, dust, or exposure to sunlight. 5) When the shaft diameter wears into a "V" shaped groove, causing the contact pressure between the new oil seal lip and the shaft to drop so that it no longer seals effectively, the displacement method can be used for compensation.

E+L seal precautions

1) Collect a fixed quantity of oil seals. 2) From collection to assembly, the oil seals must be kept clean. 3) Before assembly, inspect the oil seals. Measure whether the dimensions of each part of the skeleton oil seal match the shaft and cavity dimensions. Before installing the skeleton oil seal, clearly compare the shaft diameter with the inner diameter of the oil seal to ensure they match. The internal dimensions of the cavity must suit the outer diameter width of the oil seal. Check whether the lip of the skeleton oil seal is damaged or deformed, and whether the spring has fallen off or rusted. Prevent the oil seal from being placed unevenly during transport, which could subject it to external squeezing and impact, thereby destroying its roundness. 4) Perform machining inspection procedures before assembly. Measure whether the dimensions of the cavity and shaft parts are correct, especially the internal chamfer, which must not have a slope. The end face machining of the shaft and cavity must be smooth. The chamfer must not have damage or burrs. Clean the assembly area. There must be no burrs, sand, iron filings, or other debris at the shaft insertion point (chamfer), as these can cause irregular damage to the oil seal lip. It is recommended to use a r angle for the chamfer. 5) Regarding operational technique, you can use your hand to feel whether the surface is smooth and truly round. 6) Do not tear open the packaging paper of the skeleton oil seal too early before installation to prevent debris from adhering to the seal surface and entering the working environment. 7) Before machine installation, apply an appropriate amount of lithium-based grease containing molybdenum disulfide between the lips of the skeleton oil seal. This prevents dry grinding against the lip during instantaneous shaft startup, which affects the lip's interference fit, and assembly should be completed as soon as possible. If the seal housing with the installed oil seal is not immediately mounted, it is recommended to cover it with a cloth to prevent foreign objects from adhering to the seal. Hands or tools applying the lithium-based grease must be clean. 8) Skeleton oil seals must be installed flat, without tilting. It is recommended to use hydraulic equipment or sleeve tools for installation. The pressure should not be too high, and the speed should be uniform and slow. 9) Mark the machine on which the skeleton oil seal is installed for tracking purposes, and pay close attention to the entire process.

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