Germany Germa seals Germa model Germa price

Germa seals refer to devices that prevent fluid leakage, formed by at least one pair of end faces perpendicular to the rotation axis maintaining contact and sliding relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism, in conjunction with auxiliary seals. When the auxiliary seal of the compensation ring is a metal bellows, it is called a bellows mechanical seal. There are mainly the following four types of components. a. Main sealing elements: rotating ring and stationary ring. b. Auxiliary sealing elements: O-rings. c. Clamping elements: springs, thrust rings. d. Drive elements: spring seats and keys or fixing screws.

Germa seal construction

The skeleton oil seal structure consists of three parts: the oil seal body, the reinforcing skeleton, and the self-tightening helical spring. The sealing body is divided into the bottom, waist, cutting edge, and sealing lip according to different parts. Typically, for a skeleton oil seal in its free state, its inner diameter is smaller than the shaft diameter, meaning it has a certain "interference fit." Therefore, after the oil seal is installed in the seal housing and on the shaft, the pressure from the oil seal cutting edge and the contraction force of the self-tightening helical spring generate 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.

Germa 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) 7‐15 liters, the additive amount is 15‐20ml per liter of lubricating oil; 3) > 15 liters, the additive amount is 10ml per liter of lubricating oil; 4) Oil seals not in temporary 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 such that it cannot seal oil, the displacement method can be used for compensation.

Germa seal precautions

1) Collect a fixed quantity of oil seals. 2) From collection to assembly, oil seals must be kept clean. 3) Before assembly, inspect the oil seals. Measure whether the dimensions of all parts of the skeleton oil seal match the shaft and housing dimensions. Before installing the skeleton oil seal, clearly compare the shaft diameter with the inner diameter of the oil seal; they must match. The internal dimensions of the housing 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 flat during transportation, which could affect its roundness due to external squeezing and impact. 4) Perform machining inspection procedures before assembly. Measure whether the dimensions of the housing and shaft parts are correct, especially the internal chamfer, which must not have a slope. The end face machining of the shaft and housing must be smooth. Chamfers must be free of damage and burrs. Clean the assembly area. There must be no burrs, sand, iron chips, 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 an r angle for the chamfered part. 5) Regarding operational technique, you can feel with your hand whether it 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 into operation. 7) Before machine installation, apply an appropriate amount of lithium-based grease containing molybdenum disulfide between the lips of the skeleton oil seal to prevent dry grinding of the lip during instantaneous shaft startup, which affects the lip's interference fit. Assemble 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 matter from adhering to the seal. Hands or tools applying lithium 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. Pressure should not be excessive, and speed should be uniform and slow. 9) Mark the machine where the skeleton oil seal is installed for tracking purposes, and pay close attention to the entire process.

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