What is the correct sequence for pumping down a valve group to service the strainer?

To effectively service the strainer, it is crucial to follow a proper sequence to ensure the system maintains safety and integrity while performing maintenance. The correct sequence includes first closing the left isolation valve, which prevents flow into the valve group from that side, thereby isolating the area for maintenance. Next, manually opening the solenoid allows the system to commence pumping down the valve group, effectively removing fluid from the strainer area and creating a safer environment for service work.

After sufficient time for the group to pump down, which ensures that pressure and fluid are adequately removed, the last step is to close the right isolation valve. This final action secures the system by completely isolating the valve group and ensuring there are no unintended flows or pressures present during the service of the strainer.

The importance of the order in which the isolations and the solenoid are manipulated cannot be overstated, as it reduces the risk of accidental fluid release and pressure surges that could pose safety risks or equipment damage. This structured process adheres to standard operating procedures, enhancing both safety and operational efficiency during maintenance activities.