First, the definition of mechanical seals and hydraulic seals:
Mechanical seals belong to the precision, the structure of the more complex mechanical foundation elements, is a variety of pumps, reaction synthesis kettle, turbine compressor, submersible motors and other key components of the equipment. Its sealing performance and service life depends on many factors, such as selection, machine precision, correct installation and use.
Hydraulic seals have pressure requirements, requires a certain degree of smoothness of the bonding surface, sealing elements are mostly rubber, through the local deformation of the seal to achieve the effect of closure.
Second, mechanical seals and hydraulic seals classification
Mechanical seals: assembled seal series, light mechanical seal series, heavy mechanical seal series, etc.
Hydraulic seals: lip seals, V-shaped seals, U-shaped seals, Y-shaped seals, YX-shaped seals and hydraulic cylinders commonly used combination of seals are mainly lei shaped ring, Glei circle and Stefan.
Third, the choice of seals
In the purchase of maintenance seals, most users will be according to the size and color of the sample to buy, which will only increase the difficulty of procurement, and may not be able to choose the right product. It is recommended to use the following procedures to improve the accuracy of the purchase of seals:
1. Direction of motion – first decide where the seal is located in the direction of motion, such as reciprocating, rotating, spiral or fixed.
2. Seal focus – e.g. decide whether the point of movement is in the inner diameter of the tie rod seal or the point of movement is in the outer diameter of the piston seal.
3. Temperature ratings – determine the materials to be used by consulting the original machine instructions or evaluating the operating temperature in the actual working environment. Refer to the Manufacturer’s Notes below for a description of temperature ratings.
4. Size – most users will be used according to the old samples to buy, but seals in use for some time, will be the temperature, pressure and wear and other factors significantly affect the original size, according to the sample selection can only be used as a reference, a better way is to measure the seal location of the metal groove size, the accuracy will be higher.
5. Pressure level – from the original mechanical instructions to consult the relevant data, or by observing the original seals of the softness and hardness and structure of the inference of the working pressure level.
Post time: Aug-14-2023
