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Can butterfly valve be used for hot water

Posted by Bundor valve
Can butterfly valves be used for hot water? Bundor valve has been introduced to you in previous articles, butterfly valve is suitable for fresh water, sewage, sea water, salt water, Steam, natural gas, food, medicine, oil and various acid and alkali and other pipelines.
Whether the butterfly valve can be used in hot water pipelines, in fact, the key lies in the material of the seat sealing surface that is in direct contact with the hot water in the butterfly valve body. The hot water we usually say is generally water above 70 ℃. Under this temperature condition, there is no problem at all if a hard-sealed butterfly valve is used.

But if it is a soft-sealed butterfly valve, can the rubber-sealed valve seat be used for hot water?
If you search for the answer on the Internet, you should see that many people do not recommend the use of soft-sealed butterfly valves in hot water, because the rubber seat of the soft-sealed butterfly valve will accelerate aging and shorten the service life of the valve if it is exposed to hot water for a long time. , affecting the sealing performance of the valve.
There is no problem with this statement. The theoretical temperature resistance range of rubber materials is -20~150 °C, but because the quality of rubber produced by various manufacturers is uneven, in actual use, this temperature resistance range will be greatly reduced. The environment, of course, will accelerate the aging.
However, the soft-sealed butterfly valve is not completely unsuitable for hot water pipelines. It can be made of high-temperature resistant rubber material, which will have a much better effect and a longer service life, but the cost is also higher.
Valves such as hard-sealed butterfly valves, ball valves, gate valves, globe valves, etc. can be used instead.