Classification and difference between hydraulic seals and mechanical seals

Classification and difference between hydraulic seals and mechanical seals Classification of mechanical seals and hydraulic seals Mechanical seal models: cartridge seal series, light mechanical seal series, heavy mechanical seal series, etc. The most commonly used combined seals for hydraulic cylinders are the bud ring, the Gree ring and the step seal. When purchasing seals for maintenance, most users will buy according to the size and color of the sample, which will only increase the difficulty of purchasing, and may not be able to select the right product. The following procedures are recommended to improve the accuracy of purchasing seals:

1. Movement direction - first determine the movement direction of the location of the seal, such as reciprocating, rotating, spiral or fixed.
2. Sealing focus - such as determining the active point is the tie rod seal on the inner diameter or the active point is the piston seal on the outer diameter, etc.

3. Temperature grade - check the operating temperature from the original machine operating instructions or evaluate the working temperature according to the actual working environment to determine the required materials. A description of temperature ratings can be found in the Production User Notes below.

4. Size - Most users will choose the old samples that have been used, but the original size of the seal will be greatly affected by factors such as temperature, pressure and wear after being used for a period of time. As a reference, a better method is to measure the size of the metal groove where the seal is located, which will be more accurate.

5. Pressure level - check the relevant data from the original mechanical operating instructions, or infer the working pressure level by observing the hardness and structure of the original seal. For the description of the pressure level, please refer to the following precautions for production users. Mechanical seals are one of the basic mechanical components with precise and complex structures, and are key components of various pumps, reaction synthesis kettles, turbo compressors, submersible motors and other equipment. Its sealing performance and service life depend on many factors, such as model selection, machine accuracy, correct installation and use, etc. Hydraulic seals have pressure requirements and require a certain degree of smoothness on the joint surface. The sealing elements are mostly made of rubber, and the sealing effect is achieved through the local deformation of the seals.