April 2013

Bonus Report: Refining Developments

Improve coker efficiency with reliable valve automation

The case history discusses conditions occurring in delayed coker operations at two refineries in Louisiana, the impacts on valve performance, and a solution that offers extended life, better reliability and other benefits.

Deters, B., Calabrian Corp.; Wolkart, R., Emerson Process Management

A refinery’s delayed coker unit (Fig. 1) operates under what are perhaps the harshest conditions of any process in the plant. Equipment with moving parts, notably valves and the actuators that operate them (Fig. 2), are especially vulnerable to these severities. The following case history discusses conditions occurring in delayed coker operations at two refineries in Louisiana, US; the impacts on valve performance; and a solution that provides extended life, increased reliability and other benefits at the facilities.     Fig. 1. Multiple valves and actuators control   the coking/decoking process.      Fig. 2. Actuators are compact an

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