Check the valve stem seals role models

 

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Role model of role models role models check check the valve stem seals valve stem seals check the valve stem seals

Check the valve stem seals role models commonly used in the pump is a rubber O-ring. Its shape is very simple, and thus easy to manufacture, low cost, regardless of the overall size of the O-ring, the cross-sectional dimensions are very small, only a few millimeters, light weight, less consumption of materials, simple to use, install, easy to dismount , the use of a very wide range, the more prominent advantages in that the O-ring has a good sealing ability. The static sealing working pressure up to 100MPa more dynamic seal up to 30Mpa Suitable temperature -60 ~ 200 ℃, to meet the requirements of a variety of media to use. Therefore be more widely used in the design of the pump.
Import O-ring is installed in the trench, and is between the sealing surface, a certain amount of compression, resulting rebound to give a smooth surface and a groove bottom surface is sealed to the initial compressive stress. Thus sealing. When the fluid pressure to be sealed increases, the the imports the deformation of the O-ring also increases, which is passed to the sealing surface pressure is also increased, and also increases the sealing effect. This is imported O-ring having a good sealing ability reasons.

Import O-ring sealed and reliable, but if you do not pay attention to the conditions of use will leak, usually have the following situation:

1, mounted imports O-ring groove dimensions of tolerance, especially in the depth dimension is too large, insufficient amount of compressive deformation affect the sealing ability imports O-rings installed. The general import O-ring installed compression deformation amount should be between 18% to 22%, a large cross-sectional dimension less compression relative deformation and compression, while the smaller section size is large relative deformation.

2 the imported O-ring nominal size and the actual installation dimensions differ too much, the formation of the O-ring in the situation of the cross-sectional size reduced after stretching, resulting in compressive deformation amount insufficient leak.

3, import O-ring in the installation, the import of the sealing surface is not smooth chamfered or rounded and the scratch imported O-ring and leak.

Import O-ring material not expire for sealing medium and erosion. 5 import O-ring too long aging deterioration, decreased elasticity and failure, equipment overhaul generally O-ring replacement.

In addition, import the hardness of the O-ring, the groove and the sealing surface roughness also affects the sealing effect of the O-ring seal

Commonly used in the pump is a rubber O-ring. Its shape is very simple, and thus easy to manufacture, low cost, regardless of the overall size of the O-ring, the cross-sectional dimensions are very small, only a few millimeters, light weight, less consumption of materials, simple to use, install, easy to dismount , the use of a very wide range, the more prominent advantages in that the O-ring has a good sealing ability. The static sealing working pressure up to 100MPa more dynamic seal up to 30Mpa Suitable temperature -60 ~ 200 ℃, to meet the requirements of a variety of media to use. Therefore be more widely used in the design of the pump.
O-ring seal is installed in the trench, and is between the sealing surface, a certain amount of compression, resulting rebound to give a smooth surface and a groove bottom surface is sealed to the initial compressive stress. Thus sealing. When the fluid pressure to be sealed increases, the deformation of the O-ring also increases, which is passed to the sealing surface pressure is also increased, and also increases the sealing effect. That is, the O-ring seal having good sealing ability.

O-ring sealed and reliable, but if you do not pay attention to the conditions of use will leak, usually have the following situation:

1 fitted the O-ring groove dimension tolerance, particularly in the depth dimension is too large, so that after the installation of the O-ring compression deformation amount insufficient to affect the sealing capability. After the installation of the general O-ring compression deformation amount should be between 18% to 22%, a large cross-sectional dimension less compression relative deformation and compression, while the smaller section size is large relative deformation.

2, an O-ring seal of the nominal size and the actual installation dimensions differ too much, the working of the O-ring is formed in the cross-sectional size reduced after stretching conditions, resulting in compressive deformation amount insufficient leak.

 

 

 
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