Difficulty in opening and closing the valve
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Why is it difficult to operate the valve under backpressure? I hope experienced colleagues can provide some guidance
I'm sorry. The torque of the actuator was selected to be too low.
Can the back pressure be reduced a bit? If it’s difficult to turn it on and off, could it have little to do with back pressure?
The back pressure of a valve plays a certain role: the greater the pressure difference between the two ends, the higher the back pressure and the more difficult it is to open the valve, especially for larger valves. That’s why some pipelines are equipped with bypass valves to balance the pressure first
You can refer to this post by Haichuan: What does back pressure of a valve mean? ? http://bbs.hcbbs.com/thread-677326-1-1.html (Source: Haichuan Chemical Industry Forum)
It’s mainly due to the pressure difference between the front and back; it has nothing to do with absolute pressure, right?