At the end of June 2019, Xianyang gas was urgently requested for assistance. The user's imported electric axial flow valve was stuck and could not work normally, which seriously affected downstream gas customers and affected the gas transmission safety of the station. After receiving the user's request for assistance, Ningxia Aikefu was in Completed NPS12 in 48 hours CL600 axial flow valve factory assembly and commissioning, long-distance transportation to the customer site, on-site installation and commissioning and other work. The above picture is in the on-site commissioning at 4 am, and the customer's gas transmission is normal at 6 am.