Each valve has a DC project are six kinds of running

Each valve has a DC project are six kinds of running, were grounded, outage, standby, lockout, unlock and load boost. Control system through the inverter, circuit breakers, isolating switches and other equipment in the order control, to achieve conversion  Stainless steel needle valve . This article describes the state transitions valve control command transmission and processing circuits in the control system,  High pressure ball valve  the valve during commissioning works from a locked state to the standby state transition operation failed failed instance, the analysis of the control loop design flaws and made solution. This method has been successfully applied to engineering and Nuozadu DC DC project.