The importance of balancing valve commissioning2020-02-28
Flow balance and user room temperature monitoring system2020-03-03
In order to ensure the long-term and reliable operation of the valve, the operation of the ball valve needs to pay attention to the following points:
1. Close the ball valve and maintain the pipeline and valve in full water to ensure that the pipeline is full of water and will not be corroded by oxidation;
2. Normally closed ball valves should also be used to open and close the valve during heating operation. The opening and closing operation of the ball valve can prevent the small impurities from adhering around the seat and the surface of the ball, and it can also achieve that the torque does not increase when the ball valve is operated. Flexibility and checked whether the shutdown function is reliable;
3. Large-diameter ball valve worm gear drive, should check the drive device, keep bolts fastened, lubricate internal transmission gears, and pay attention to add when the lubricating oil of the worm gear transmission is low;
4. The large-diameter ball valve has a bypass design. When the system is in operation, the large-diameter ball valve needs to be opened; the bypass valve should be opened first, and then the large-diameter ball valve should be opened. The advantages of this operation:
①. It can reduce the pressure difference between the front and back of the large-diameter ball valve, and reduce the operating torque of the large-diameter ball valve.
② High pipeline pressure and fast flow rate will cause impurities flowing in the medium to damage the sealing surface of the valve ball and valve seat for a long time.
5. When the system is in operation, the large-diameter ball valve needs to be closed; the bypass valve should be opened before closing the large-diameter ball valve. Because the large-diameter ball valve takes longer to operate than the bypass valve, wait until the large-diameter ball valve is fully closed in place. The bypass valve is closed. The operation of this method can make the large-diameter ball valve in the process of closing, the valve is avoided and reduced at a small opening, and the impurities in the flowing medium will damage the sealing components at high flow rates.