Feed Control

The unit feed valve is a challenging valve which can cause swings in the amount of conversion through the hydrocracker unit. If the swings are wide enough, this will actually limit unit throughput and lead to increased coke laydown on the catalyst, potentially shortening reactor life. 

Feed valves are usually set up as flow-control loops and are configured to fail open so that a valve failure will protect the furnace’s radiant section tubes. If a radiant tube loses or has insufficient flow it can become so hot that it melts and ruptures, causing fuel to dump directly into the furnace firebox.

Poor valve control provides inconsistent feed rates and can lead to difficulties controlling the outlet temperature of the furnaces, or allow layers of the coke to build on the inside of the radiant tubes. This shortens the furnace cycle time between decoking procedures, which causes increased and unplanned unit shut downs.

Achieve unrivaled valve control using Spartan’s steel body Fisher V300 or Fisher ET/EWT globe valves with ENVIRO-SEAL packing. Gain increased throughput, reduce unplanned shut downs and increase your reactor life. 

Fisher
Fisher Large ET control valves are used for either throttling or on-off control of a wide variety of liquids and gasses.
Fisher
Fisher EZ valves (figure 1) are used for throttling or on-off control of a wide variety of liquids and gases. The single-port, globe-style body design offers quick-change trim and a post-guided, unbalanced valve plug. The EZ valve is used in chemical or hydrocarbon processing applications or wherever control of non-lubricating, viscous, or other hard-to-handle fluids is required.
Fisher HP Series control valves are single-port, high-pressure, globe- or angle-style valves with metal seats, cage guides, and push-down-to-close valve plug action. These valves are designed for high-pressure applications in process control industries such as power generation, hydrocarbon production, chemical processing, and refining.
The FIELDVUE DVC6200 is a digital valve controller capable of operating using 4-20 mA, HART, Fieldbus, or Profibus communication protocols. The basis of its operation is the conversion of a control signal into a pneumatic output controlling valve position.
Rosemount DP Flow products provide higher accuracy over a wider flow turndown than traditional DP technology. With years of industry knowledge and experience, Rosemount offers a wide selection of products for flow applications which increase process efficiency and safety at the best total installed value.
Vee-Ball™ V300 is a flanged valve for throttling or on-off operation for many different applications in the process industries. The V300 is available in NPS 1 through 16, CL300 (DN 25 through 100, PN 15/40). Trim components are interchangeable between Design V150, V200 and V300.