October 2021

Valves, Pumps and Turbomachinery

Redundant control pilot valve system adds reliability in downstream operation

In downstream processing facilities, such as refineries and chemical plants, downtime is a significant source of lost revenue.

Boltniew, G., Emerson

In downstream processing facilities, such as refineries and chemical plants, downtime is a significant source of lost revenue. At best, this downtime could last a few minutes, due to routine maintenance or a spurious trip of a process valve. At worst, an equipment failure can drag unplanned shutdowns into entire days. Losses of $1 MM/d are not unheard of at this end of the spectrum, and, depending on the issue, the failure can be catastrophic. Critical process valves, like the emergency shutdown (ESD) valve, must function on demand to keep people and equipment safe. However, the ESD valve does not shut down process flow on its own; it must be activated by a solenoid pilot valve and actuator

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