The SchuF Fetterolf Group has been awarded a significant new Delayed Coking contract by a Canada-based oil and gas company. The new Delayed Coking Unit (DCU) will be built in Montreal and will increase capacity of the refinery by 25,000bpd. The contract includes multiple 30in (30in / DN750) isolation valves with integral draining functionality (ASME 300# to 600# with A217 C12 as the material of construction) and 5 purge/flush ports. The isolation valves play a critical role in the coking process and must operate in severe conditions with temperatures reaching 930F and with abrasive coke particles in the flow. The new valve design called the SchuF IsoPlug was chosen for the project due to a number of factors including the unique “3 line Coking Defence System (3 CDS)”. 3 CDS is a package of features which eliminates the possible build up of coke particles in the valve. The first line of defence is flushing during plug lifting and turning, followed by draining to an integrated drain valve. The final element is the possibility to retract the bottom plate of the valve in order to hydro blast the seat area. This can be done without taking the plug out of the valve or the valve out of the line and is possible during alternative drum cycles.