SIT Optimizes Footprint & Improves Efficiency with Retrofit Design for Refinery Hydraulic Control Unit (HCU)

June 17, 2019

When a customer was looking for an updated solution to operate their coke drum unheading system, Supreme Integrated Technology, Inc. stepped up to the challenge. The goals of the project were to:


  • Optimize footprint of the console
  • Enhance safety of operation
  • Improve efficiency of system


The unit was designed and built to customer specifications. Providing external hydraulic, pneumatic and electrical supply to the console allows top drum unheading without operators positioned on the cutting deck.  This safety consideration protects operators from potential coke drum eruptions and top head blow-outs.


Components include:


  • 11 Station Panel Mounted Proportional Valve Assembly
  • Master Enabling Valve with Spring Return Lever
  • Class 1 Div 2 Electrical Control Panel
  • 7 Class 1 Div 2 Solenoid Operated Directional Valves
  • Custom Hydraulic Manifold
  • 3 Station Flow Divider
  • High Pressure Filter Assembly
  • 4 Panel Mounted Pressure Gauges with Overlays
  • 2 Independent Fluid Circuits: Hydraulic & Pneumatic (Nitrogen)
  • All Stainless Steel Console
  • Removeable Panels for Easy Maintenance Access
  • Transparent Lexan Safety Shield


SIT improved the design by using an integrated manifold instead of individual valve bodies to minimize tubing, potential leak points as well as reducing cost.  Engineers started with a consultation of the existing schematic, followed by assistance with drawings and BOM for a new design.  They provided important on-time delivery and factory accepted testing (FAT) that could be witnessed by the customer remotely or on location at SIT’s state-of-the-art manufacturing facility in Houston.