Most people have a hard time distinguishing between mechanical seals and hydraulic seals and think they are the same thing.

Definition of mechanical seals:

The mechanical seal is one of the precise and complex mechanical basic components, and it is the key component of all kinds of pumps, reaction synthesis kettle, turbine compressor, submersible motor and other equipment. Its sealing performance and service life depend on many factors, such as selection, precision of the machine, correct installation and use, etc.

Definition of hydraulic seals:

The hydraulic seal has pressure requirements, which require the joint surface to have a certain degree of finish. The sealing components are mostly made of rubber, and the sealing effect is achieved through the local deformation of the seals.

Mechanical seals and hydraulic seals classification:

Model of mechanical seals: assembled seal series, light mechanical seal series, heavy mechanical seal series, etc.

Hydraulic seals: lip seals, V-ring, U-ring, Y-ring, YX ring and hydraulic cylinder commonly used combined seals are mainly Lei-ring, Grey ring and Ste seal.

In the purchase of maintenance seals, most users will buy according to the size and color of the sample, which will only increase the difficulty of procurement, and may not be able to select the right product. The following procedures are recommended to improve the accuracy of seal procurement;

A: Direction of motion -- first determine the direction of motion of the position of the seal, such as reciprocating, rotating, spiraling or fixing.

B: : Sealing key point - such as determining the active point is in the inner diameter of the tie rod seal or the active point is in the outer diameter of the piston seal, etc.

C: Temperature grade -- check the operating instructions of the original machine or evaluate the working temperature according to the actual working environment to determine the required materials.

D: size - most users will be used according to the samples of choose and buy, but the seal in use after a period of time, will be affected by factors such as temperature, pressure and wear greatly its original size, according to the sample selection can only be as a reference, a better approach is to measure metal seal position groove size, higher accuracy.

E: Pressure grade -- refer to the relevant data from the instructions of the original machine, or infer the working pressure grade by observing the hardness and structure of the original seal.