Where is the flange of pneumatic slow opening valve butterfly valve used for central air-conditioning? Air close type: the action direction is exactly opposite to that of air open type. When the air pressure increases, the valve acts in the closing direction. When the air pressure decreases or does not exist, the valve acts in the opening direction until it is fully opened, so it is sometimes called fail to open FO. Air opening or air closing of pneumatic butterfly valve is usually realized by different assembly methods of valve body internal structure and actuator.
、 We all know that pneumatic butterfly valves occupy a huge position and influence in people's lives. In order to make pneumatic butterfly valves play a huge advantage, we also need to pay attention to several key aspects during installation, so as to ensure the normal operation of pneumatic butterfly valves. What aspects should we pay attention to when manufacturing and installing pneumatic butterfly valves? Here are the aspects we should pay attention to when installing pneumatic butterfly valves.
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