Which one has better sealing? butterfly valves or gate valves?
Gate valves and
butterfly valves are very commonly used valve models. The two kinds of valves all can be used to cut off the medium flow in the pipeline. However, there is a gap between butterfly valves and gate valves in terms of sealing performance. In this article, we, Landee Valve will lead you to understand together, which one is better for the sealing performance of the butterfly valve and the gate valve?
The sealing performance of the gate valve is better than that of the butterfly valve. The gate valve can only be fully opened or fully closed, which can completely block the flow of media after closing. The butterfly valve is allowed to have a certain amount of leakage.
To be specific, the flow resistance of the gate valve is small and the sealing performance is good. Because the flow direction of the gate valve plate and the medium is vertical. If the switch of gate valves in the valve plate is not in place, the erosion of the medium on the valve plate will make the valve plate tremble, which is easy to cause seal damage to gate valves. Therefore, it is used for the cut-off of the pipe that requires strict sealing and does not need to be opened and closed frequently. It is not suitable for regulating the medium parameters of the pipeline.
Because the speed of opening and closing is slow, it is not suitable for emergency cutting occasions. The gate valve can be used in a wide range of working conditions, such as high temperature, low temperature, high pressure and low pressure.
The butterfly valve has not only a cut-off effect but also the function of adjustment. The butterfly valve can be opened and closed quickly. It can be opened and closed frequently which is especially suitable for the occasion that needs fast opening or cutting off. Compared with the gate valve, the butterfly valve is small in size, light in weight and cheap in price. In some conditions with limited installation space, you can choose the double-clip butterfly valve to save more space.
Therefore, it can be made into a butterfly valve with a large caliber and more than DN300. It can be used to transport containing small particles of the unclean medium pipeline. However, the butterfly valve uses a small range of pressure and temperature. The sealing performance of the butterfly valve is not as good as that of the gate valve. The price of butterfly valves with the same caliber is much lower than that of the gate valve.
In many working conditions, butterfly valves gradually replace other types of valves. It becomes the first choice for many users. The main difference between the gate valve and the butterfly valve is that the former has no regulating function and the latter has a regulated function.
From the above, which has better sealing? Butterfly valves or gate valves? Gate valves are better, of course. However, when we choose the valve, we still need to adapt to local conditions, specific conditions and specific analysis, and choose the right valve.
