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Gasket seals for hydraulic cylinders

Update:2017-01-18

Hydraulic cylinders have different technical requirements, gaskets seals must meet the technical requirements of the cylinder.

Cylinder pressure above 25MPa, speed 0-0.5 m / s, oil temperature 80 ℃, to meet the above conditions, the gaskets seals must meet the following technical requirements.

(1) Gaskets seals hardness selected 92 degrees to 97 degrees, the higher the cylinder pressure, the greater the hardness of selected seals.

(2) Gaskets seals line lip speed must meet the 0.5 m / s.

(3) Gaskets seals temperature must meet -30 ℃ ~ 110 ℃ temperature. Because the seal lip contact surface temperature is higher than the hydraulic oil temperature, so the seal selection must be high temperature 110 ℃; and in some places the temperature is around -30 ℃, so the choice of seals is low temperature -30 ℃.

(4) To select a special seal, such as shaft position, can only use shaft-specific seals. Piston positon can only use piston-specific seals, and can not use shaft and piston rod seals. Because the root width of the dual-purpose seal is less than the width of the root of the special seal.

(5) Seals to be added the gaskets.

Why should use the Gaskets seals? How about the hardness of Gaskets seals?

As the cylinder pressure of 25MPa or more, the height of the seal element determines the size of the root deformation of the seal, which is the size of the extrusion gap, because the gasket also has hardness, but also deformation, with gaskets equal to reduce the deformation of the seal, So that the seal at high pressure, the root of the piston rod or cylinder wall to reduce the possibility of friction with the inner wall, thereby reducing the root of the seal was squeezed out of the chance of damage. Gasket hardness and pressure relationship is, the greater the pressure, the greater the hardness.

If the cylinder pressure below 25MPa, speed 0.5 m / s, oil temperature 80 ℃ to meet the above conditions, the seals need to meet the following requirements:

(1) Gaskets seals hardness selected 85 degrees to 92 degrees, because the lower the hardness, the better the elasticity of the seal.

(2) speed and temperature requirements and 25MPa above the same pressure requirements.

(3) Seal selection, you can use special, dual-use, and other forms of seals.

DSH Seals offer various materials of Gaskets seals, if you have any inquires, customized or standard Gaskets seals, we can meet your needs.

Thanks for your time.