What is the first step in removing a General Twin Seal plug valve operator?

The first step in removing a General Twin Seal plug valve operator involves closing the main valve. Closing the valve ensures that the system is securely isolated and that there is no flow of fluid through the valve while maintenance is performed. This is crucial for safety and for preventing any accidental leaks or pressure surges that could occur if the valve is still open.

By securely shutting the valve, maintenance personnel can work on the operator safely without the risk of hydraulic or pneumatic energy releasing unexpectedly. Ensuring the main valve is closed also helps to minimize the potential for any contamination or damage to the components involved in the operation and maintenance process.

In this context, draining the line and opening the main valve as initial steps could potentially introduce risks, such as exposure to dangerous fluids or pressure, making those options less appropriate. The mention of the worm gear likely pertains to the mechanics of the valve operation but is not relevant as the first step in the removal process.