Pneumatic ball valve, front-to-back pressure difference – what impact does it have on selection?
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As the title suggests, let’s discuss this. The pressure difference before and after the control valve has a significant impact; since calculations are involved, what about the shut-off valve? What effects does it have?
The greater the pressure difference, the more difficult it is to achieve cutoff, which affects the timing of cutoff
You can choose our patented ball valve, which can operate normally even under full pressure differences; the opening and closing time for sizes 2\"–40\" is 1 second to 10 seconds!
The shut-off valve has requirements regarding the cylinder, as there is a maximum pressure difference for closing/opening
Cylinder specifications matter; the operating torque for each type of cylinder falls within a certain range. A larger pressure difference requires greater switching torque, and in such cases the standard cylinders may not be sufficient.
I’ve learned from it; thanks to all the experts for their insights
Pneumatic actuators need to generate sufficient torque.
Detailed calculations are required for selecting the actuator.
First, for the valve body itself, when the pressure difference is high, a fixed ball valve is more suitable than a floating ball valve； Secondly, for the actuator, a higher pressure difference results in a greater torque required to rotate the valve core; therefore, a larger actuator is needed. This is why valves designed for high pressure differences tend to have a large head but a small body.