In sealing elements, propane o-ringsare widely used. The sealing effect of an propane o-rings depends not only on its material, process, and process but also on its installation process. In the assembly of propane o-rings, if improper operation, it will cause O-ring damage, and then lead to leakage, serious will also cause personal injury, mechanical parts damage, economic loss, and so on. Therefore, the installation quality of propane o-rings has an important influence on its sealing performance and service life.

How to install the propane o-rings correctly?

Precautions before installation:

1. Check the condition of the O-ring, and there should be no flash, burr, impurity, and other defects and scratches. The inner diameter should be deburred and the cross-section diameter should be uniform;

2. Check whether the O-ring groove and the surface of the installed O-ring are smooth and clean. If not, please clean it strictly;

3. Check whether the lead-in angle is machined according to the drawing and whether the sharp edge is chamfered or rounded. In order to prevent the O-ring from being cut or scratched by sharp edges such as sharp corners and threads during installation, a lead-in angle of 15 ° to 30 ° should be reserved at the shaft end and hole end of the installation. When the O-ring needs to pass through the external thread, the special thin-walled metal guide sleeve should be used to cover the external thread; if the O-ring needs to pass through the orifice, the orifice should be inverted into the corresponding bevel shape to prevent the O-ring from being scratched. The bevel angle of the groove is generally a = 120 ° to 140 ° C;

4. Check whether the seals and parts have been coated with grease or lubricant (in order to ensure the medium compatibility of the elastomer, it is recommended to use the sealed liquid for lubrication). Pay attention not to use grease containing solid additives such as molybdenum dioxide, because the solid lubricants of molybdenum disulfide, graphite and copper powder lubricating grease have certain particles, easy to wear O-rings, and all of them contain a very high content of solid additives such as molybdenum dioxide Extreme pressure additive, high content of S element, easy to corrode rubber.

What should be paid attention to in installation?

1. During installation, the hardness of the O-ring should be considered, and the O-ring should not be stretched excessively to prevent distortion and discount;

2. Do not use sharp tools during installation to avoid scratching and abrasion of O-ring surface;

3. When installing, try to use auxiliary tools to install O-ring and ensure correct positioning;

4. For the O-ring bonded with sealing strip, it is not allowed to stretch at the joint to avoid breaking the O-ring;

5. When the O-ring needs to pass through the screw, spline, keyway, etc., the installation mandrel must be used. The mandrel can be made of soft and smooth metal or plastic without burr or sharp edge;

6. When installing the hold-down screws, the screws should be tightened symmetrically instead of in sequence.

The above is about how to correctly install the O-ring basic precautions, hope that through the above sharing can bring you help.