Fractionator Bottoms Flow Control

Fractionator bottom to reactor flow control loop uses a control valve to recycle some of the bottoms slurry back to the reactor for further processing. The potential for the creation of a great deal of erosion in the control valve exists due to entrained catalyst. 

A fisher V500 eccentric plug valve is installed in many applications, but a Fisher 461 severe service angle control valve, supplied by Spartan, is the most rugged solution. Both the Fisher V500 and the Fisher 461 are available with special upgraded trim offerings suitable for erosive catalytic bottoms, heavy ends and erosive catalyst flows. Steel, SST or chrome moly bodies which are designed specifically for harsh conditions will increase your technology’s life and Rosemount DP transmitters assist in measuring flow with several different primary elements. 

he Fisher V500 eccentric plug rotary control valve controls erosive, coking and other hard-t-handle fluids, providing either throttling or on-off operation.
The Fisher 461 Sweep-Flo valve, is a self-cleaning, increased outlet, angle valve that features a venturi-type throat, which is useful where high pressure drops, slurries or flashing might exist. It is typically used in the hydrocarbon, power and chemical industries.
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.