What are the factors that affect the use of fluorine rubber seals?

Many machines will have fluorine rubber seals, so do you know what are the factors that affect the use of fluorine rubber seals? Here is a brief introduction for everyone.

Insufficient machining accuracy: There are many reasons for the insufficient machining accuracy. Some of the reasons are the insufficient machining accuracy of the fluorine rubber sealing ring itself. This reason is easy to attract people's attention and easy to find. But sometimes the machining precision of other parts of the pump is not enough. The reason for this is not easy to attract people's attention. For example: the increase precision of the pump shaft, shaft sleeve, pump body, and sealed cavity is not enough. The existence of these reasons is very unfavorable to the sealing effect of the fluorine rubber sealing ring.

Vibration is too large: Vibration of the fluorine rubber seal ring is too large, which will eventually lead to the loss of the sealing effect. However, the reason for the large vibration of the fluorine rubber seal ring is often not the reason for the fluorine rubber rod seal ring itself. Other parts of the pump are the source of vibration, such as unreasonable pump shaft design, processing reasons, insufficient bearing accuracy, and coupling. Reasons such as poor parallelism and large radial force.

The axial displacement of the pump shaft is large: the sealing surface of the fluorine rubber seal must have a certain specific pressure, so as to have a sealing effect, which requires the spring of the fluorine rubber seal to have a certain amount of compression. A thrust of the end face of the fluorine rubber seal ring rotates to generate the specific pressure required by the seal. In order to ensure this specific pressure, the fluorine rubber seal ring requires the pump shaft to not have too much displacement. The fluorine rubber rod seal ring cannot withstand the axial force during use. If there is an axial force, the fluorine rubber seal ring The impact is serious. Sometimes the axial force is not balanced due to the unreasonable design of the axial force balance mechanism of the pump, manufacturing, installation, and use. The fluorine rubber sealing ring bears an axial force, and the temperature of the sealing gland will be higher during operation. For polypropylene-based media, it will be melted at high temperatures, so the sealing effect will be lost soon after the pump is started, and the sealing will be sealed when the pump is stationary. Intermittent spray leakage occurred on the end face.

There is no auxiliary flushing system or the auxiliary flushing system setting is unreasonable: the auxiliary flushing system of the fluorine rubber rod seal is very important. The auxiliary flushing system of the fluorine rubber seal ring can effectively protect the sealing surface, and play a role in cooling, lubricating, and washing away debris. Sometimes the designer does not configure the auxiliary flushing system reasonably, and the sealing effect cannot be achieved; sometimes although the designer designs the auxiliary system, but due to impurities in the flushing fluid, the flow and pressure of the flushing fluid are not enough, and the design of the flushing port position is unreasonable, etc. , Also can not achieve the sealing effect.

What I have introduced above are the factors that affect the use of fluorine rubber seals. I hope it can be helpful to you. If there is anything you don’t know, you can directly communicate with our customer service. We will serve you wholeheartedly, thank you Watching.

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