Abstract: The structure, operating principle, daily care, and troubleshooting during the operation of gas-oil (GOV) used in Shannxi-Beijing gas transmission pipeline are introduced. This kind of valve imported from SHAFER has many advantages, such as simple operation, sensible response, and fast on/off. The GOV with RTU can realize the remote transfer of signal, monitor the GOVs in the control center, which provides the reliability and safety of the pipeline operation.