Not flexible during valve opening and closing
During the opening and closing of the valve, it is sometimes felt that the jam is inflexible, and the opening and closing are very laborious. Sometimes it cannot be opened and closed with the normal opening and closing force, even after a certain distance is opened and closed, it cannot continue to open and close. There are some reasons for this failure, such as the valve stem and other parts are stuck, such as the packing gland is tilted and hit the valve stem, the second is that the packing is not installed correctly or pressed too tightly, followed by the valve stem and other parts or bite Dead, and no lubricant is added where the lubricant is added. To prevent such malfunctions, first avoid paper jams, loosen the packing correctly, install the packing correctly, and apply the appropriate lubricant to the place where the lubricant is applied.
