Natural gas pipeline valve types are different, so the respective faults also have some differences. For example, the use of turbine, worm gear mesh transmission so as to operate the ball valve in the use of the process of failure generally including serious wear or broken gear caused by the site is often unable to mesh; Improper operation will make the safety pin on the worm break during use; Whether the bearing on the worm or the turbine is damaged, the normal work of the valve will be blocked; When the grease fills with water, it may become contaminated, which may cause valve failure.

The bolts connecting the wheel box and the valve body may be loosened and broken. In the case of missing power supply or wrong connection of lead, the electric head is likely to fail. The common fault of gas-liquid linkage ball valve is that the speed limit valve of pipeline is always closed due to the blockage of gas and oil lines. The pressure of the air source is too small to support the normal operation of the valve; Some hydraulic cylinders or rotating parts seal damage caused by leakage.

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