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2022

Selection of pneumatic high temperature ball valve

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Selection of pneumatic high temperature ball valve
Introduction to working conditions: A customer bought a pneumatic ball valve to pass steam. The steam temperature is about 180 °C, and sometimes the temperature can reach more than 200 °C. After a search, we learned that the customer bought a Q641F stainless steel pneumatic ball valve. The valve body and the ball rest are made of stainless steel 304. The customer asked if the stainless steel can not withstand high temperature? Stainless steel can withstand high temperature, but this configuration cannot withstand high temperature, the critical temperature is 180 ° C, that is to say, only working within the temperature range of 180 ° C can prolong the service life of the ball valve.
Solution: The valve seat of ordinary pneumatic ball valve is PTFE, the temperature resistance is up to 150℃, and the limit temperature is 180℃, but it cannot work at 180℃ for a long time. The valve seat of the pneumatic high temperature ball valve is made of high temperature resistant material PPL (PPL is para-polyphenylene, also known as polyphenylene, which can be used continuously at 260 °C, with a maximum operating temperature of 290-300 °C, extremely low friction coefficient, good High wear resistance and excellent chemical stability), so users should pay attention when purchasing pneumatic ball valves. When the temperature is greater than or equal to 180 °C, the high temperature resistant pneumatic ball valve is the first choice. The model is: Q641PPL-16P/C!