A professional who controls rotary-leaf filters and such auxiliary equipment as centrifuges, pumps, compressors, heat exchangers, and conveyors, to remove process catalyst from polyethylene products. Respnsibilities include:

• Starts pumps, centrifuges, and compressors.
• Observes gauges and chart recorders; turns valves; and sets automatic control instruments to regulate temperatures, pressures, flow-rates, and liquid levels within plant specifications, and to transfer materials between units to ensure efficient removal of catalyst.
• Directs other workers engaged in tending pumps, compressors, and centrifuges and in making manual adjustments to equipment to maintain required process conditions.
• Moves manual and automatic controls to switch filters into and out of service for replacement of diatomaceous-earth coating.
• Records instrument readings and laboratory test results in operating log.
• Inspects equipment for malfunctions, wear, and leaks, reporting need for repairs to maintenance personnel.