What does the valve cover gasket do?

The gasket of the valve cover in the valve is very important. It can seal the gap between the valve cover and the valve body to prevent the flowing material from leaking out of the gap. The gasket is so important to the valve, what does it do? Now let me tell you about the five functions of valve gaskets.

1. Sealing effect: In order to tell you about the sealing effect of gaskets, let me give you an example using a gate valve. For example, the valve cover and valve body gasket of the gate valve are made of rubber or graphite. The main function of these gaskets is to seal, which is to prevent materials flowing in pipes or other places from leaking out of the gaps in the valve. When the gate valve is closed, the valve disc will press the gasket tightly, causing the gasket to deform to fill the gap between the valve cover and the valve body to achieve a sealing effect.

2. Support and fixation: The gasket of the valve cover can support the valve disc so that the valve disc can be fixed on the valve body, otherwise the valve disc will fall off the valve body. The gasket can also be fixed in position between the valve cover and the valve body without affecting the normal operation of the valve.

3. Reduce vibration and noise: When the valve is closed, the gasket can reduce the vibration caused by work, and also reduce the impact of the valve disc on the valve seat, thereby reducing the noise generated during work. The gasket is also very elastic. The elasticity of the gasket can absorb part of the pressure of the flowing material, reducing the impact of the flowing material on the valve and reducing the noise.

4. The function of preventing other substances from entering: The gasket of the valve cover can prevent external impurities and gases from entering the interior of the valve. This protects the sealing surface and internal structure of the valve from damage, and allows the valve to operate normally. Works and uses longer.

5. The function of auxiliary sealing: Some valve gaskets not only have the function of sealing but also have the function of auxiliary sealing. For example, in the valve packing, the valve gasket can prevent the leakage of the packing; in the vacuum system, the valve gasket can prevent the gas leakage.

How does the valve cover gasket seal?

1. The material used to make the gasket must have a certain degree of elasticity and resilience. When a valve's gasket is subjected to very tight pressure, its material will deform, and then the gap between the valve cover and the valve body will be filled, so that the gasket plays a sealing role. The material of the gasket must also have resilience. With resilience, it can adapt to pressure changes and temperature changes during work, ensuring the sealing performance of the gasket.

2. The structural shape of the valve gasket will also affect the sealing effect. The most common gasket shapes are round, rectangular and other irregular shapes. According to the characteristics of the flowing materials in different valve pipelines, selecting the appropriate gasket can improve the sealing performance of the valve. For example, in valves that need to withstand high pressure or high temperature, metal gaskets can be selected to increase the strength of the working machinery.

According to what I said above, the sealing effect of the valve cover gasket is mainly determined by the material and structural shape of the gasket. When selecting and using gaskets, everyone must fully consider the working conditions and requirements of the valve, and select the appropriate gasket material and shape to ensure the long-term use and sealing performance of the valve. When installing and maintaining valves, everyone must install and maintain gaskets correctly, so that the valve can work normally and be used for a long time,wafer type double check valve.

What precautions should be taken when installing gaskets?

Installing the gasket may seem simple, but it requires attention to a lot of details. Let me tell you what you need to pay attention to when installing gaskets.
I hope you can pay attention to these details when installing the gasket after reading this.
1. Make sure the inside of the valve is clean. Before installing the gasket, clean the inside of the valve to remove any dust and dirt. Doing this ensures the sealing effect and long service life of the gasket.

2. Pay attention to the quality of the gasket. Before installing the gasket, be sure to carefully check whether the gasket is in good condition and see if there is any damage or aging. If you find that there is a problem with the gasket, do not continue to install it and install it with a new one. Never use damaged gaskets to save money, otherwise losses are likely to occur.

3. Be sure to choose the appropriate gasket material. Different valves require gaskets of different materials because they flow different materials. For example, in high-temperature environments, gaskets that can withstand high temperatures must be selected; for corrosive flowing materials, corrosion-resistant gaskets must be selected. Only in this way can the gasket be guaranteed to work properly and seal effectively.

4. Pay special attention to the installation direction of the gasket. Some gaskets have front and back sides. When installing, the gaskets must be aligned and placed in the correct position. If the gasket is placed backwards, it will not function as a seal and will cause the valve to leak. Here, I would like to remind everyone that when installing the gasket, you must look at the front and back sides clearly, and do not install it backwards and cause unnecessary losses.

5. Be sure to apply sealant evenly. When installing the gasket, you can apply a little sealant on the front and back sides of the gasket. Do not apply too much. This can better fix the gasket and improve the sealing of the gasket. If too much sealant is applied, the sealing effect will be affected.

6. The bolts must be installed correctly. After installing the gasket, the bolts need to be tightened to secure the gasket. When tightening the bolts, tighten them in order and with force. Do not tighten them casually or with too much force to avoid damaging the gasket and causing poor sealing.

7. Gaskets must be inspected and maintained. After installing the gasket, check the sealing and maintenance of the valve at regular intervals to see if there is any leakage. If the valve leaks, check whether the gasket is still good and whether it is damaged. If the gasket is damaged, replace it with a new one.