| Common process variables to be sensed and controlled are temperature, pressure, flow and level. Control Systems are supplied as part of the skid assembly or remote from the system. Only external line, load and sensor connections are necessary as the panel is completely wired and ready to install. Besides temperature, Big Chief can also design and supply Control Panels for other control processes using PLC’s and other components. UL and cUL Listing can be provided. The panel generally consists of a NEMA 4X or NEMA XII enclosure for floor, skid or wall mounting. Components are determined by specification, and can consist of the following:
Process Control – Control results are virtually perfect using Big Chief ETR Controls with Smarter Logic. A wide range of sizes and features provide the ideal control for any process. The ETR can accept input from all thermocouples, RTD’s, and many devices with a current or voltage signal. Certain models have a NEMA 4X rating for applications requiring wash down or for corrosive atmospheres. For controls with a serial communications port, Big Chief-Link Communications Software allows multiple controls to be networked and remotely programmed from a host computer. Big Chief controls and panels can also be linked with other industrial software or Distributed Control Systems. The ETR-3 FM Approved limit control provides protection to the heat source and the process.
Other Panel Components:
 Properly sized SCR power or stepper controls, solid state relays
 or other load switching devices
Motor starters for pumps
Panel annunciators
Primary and secondary fusing, circuit breakers, terminal
blocks, transformers
Fan, filter or heat sink
Panel lights, switches, buttons or indicators |
With more than fifty years of process electric heat and control experience, Big Chief can design and manufacture a complete skid mounted or packaged Process Heat and Control System for many applications in many industries. Versatility, along with very accurate process control capabilities has the popularity of electrically heated systems increasing versus larger combustion fired systems. Efficiency is superior in that the total immersion of the heat source converts all electric energy into heat energy. Big Chief Systems and Assemblies can be considered wherever large volumes are being heated or when a process requires a significant temperature rise. A combination of multiple heaters and staging controls can heat extreme quantities or volumes. State-of-the-art control system components provide extreme accuracy. Processes to be heated are not limited to liquids, but can include gasses and vapors. Process heating application requirements can be met by Big Chief with a code-stamped vessel or a skid mounted assembly consisting of heaters, vessels, pumps or blowers, meters, piping, pressure or temperature sensors and all instrumentation. In-house manufacturing of ASME coded pressure vessels and UL and cUL Listed Control Panels and other certifications including CE can be provided. Advanced design, manufacturing and testing equipment add to Big Chief’s extensive capabilities to meet varied process applications. From just a couple of kilowatts to megawatts of power, Big Chief can supply everything from concept through manufacturing to delivery to start-up with single source responsibility. Some typical applications for our Process Heat and Control Systems…
Before manufacturing, we will provide required drawings with a bill of materials, general arrangement, skid and vessel drawings with code calculations, electrical and panel schematics, component data sheets and tests to be performed. Any other application or design calculations will also be supplied. An Operation Manual is included upon delivery of the system.