# Separating, Filtering, Clarifying, Precipitating, and Still Machine Setters, Operators, and Tenders > Set up, operate, or tend continuous flow or vat-type equipment; filter presses; shaker screens; centrifuges; condenser tubes; precipitating, fermenting, or evaporating tanks; scrubbing towers; or batch stills. These machines extract, sort, or separate liquids, gases, or solids from other materials to recover a refined product. Includes dairy processing equipment operators. - Code: 51-9012.00 (O*NET-SOC; SOC 2018 51-9012) - Family: [Production](https://foundation.org.ai/occupations#family-51), one of its 114 occupations - Tasks: 20 tasks (14 core and 6 supplemental) - Page: https://foundation.org.ai/occupations/51-9012.00 - JSON: https://foundation.org.ai/data/tasks/51-9012.00.json ## What the work is made of 1. Dump, pour, or load specified amounts of refined or unrefined materials into equipment or containers for further processing or storage. Core task · Task 12366 · Rated by 87 people who do the job, July 2015 2. Operate machines to process materials in compliance with applicable safety, energy, or environmental regulations. Core task · Task 19918 · Rated by 73 people who do the job, July 2015 3. Monitor material flow or instruments, such as temperature or pressure gauges, indicators, or meters, to ensure optimal processing conditions. Core task · Task 12357 · Rated by 87 people who do the job, July 2015 4. Turn valves or move controls to admit, drain, separate, filter, clarify, mix, or transfer materials. Core task · Task 20824 · Rated by 86 people who do the job, July 2015 5. Set up or adjust machine controls to regulate conditions such as material flow, temperature, or pressure. Core task · Task 12356 · Rated by 87 people who do the job, July 2015 6. Examine samples to verify qualities such as clarity, cleanliness, consistency, dryness, or texture. Core task · Task 20825 · Rated by 87 people who do the job, July 2015 7. Start agitators, shakers, conveyors, pumps, or centrifuge machines. Core task · Task 20826 · Rated by 86 people who do the job, July 2015 8. Inspect machines or equipment for hazards, operating efficiency, malfunctions, wear, or leaks. Core task · Task 12365 · Rated by 86 people who do the job, July 2015 9. Collect samples of materials or products for laboratory analysis. Core task · Task 12360 · Rated by 85 people who do the job, July 2015 10. Communicate processing instructions to other workers. Core task · Task 12368 · Rated by 87 people who do the job, July 2015 11. Turn valves to pump sterilizing solutions or rinse water through pipes or equipment or to spray vats with atomizers. Core task · Task 12372 · Rated by 86 people who do the job, July 2015 12. Maintain logs of instrument readings, test results, or shift production for entry in computer databases. Core task · Task 20827 · Rated by 87 people who do the job, July 2015 13. Remove clogs, defects, or impurities from machines, tanks, conveyors, screens, or other processing equipment. Core task · Task 12369 · Rated by 86 people who do the job, July 2015 14. Clean or sterilize tanks, screens, inflow pipes, production areas, or equipment, using hoses, brushes, scrapers, or chemical solutions. Core task · Task 12364 · Rated by 86 people who do the job, July 2015 15. Measure or weigh materials to be refined, mixed, transferred, stored, or otherwise processed. Supplemental task · Task 12363 · Rated by 86 people who do the job, July 2015 16. Test samples to determine viscosity, acidity, specific gravity, or degree of concentration, using test equipment such as viscometers, pH meters, or hydrometers. Supplemental task · Task 12362 · Rated by 86 people who do the job, July 2015 17. Install, maintain, or repair hoses, pumps, filters, or screens to maintain processing equipment, using hand tools. Supplemental task · Task 12371 · Rated by 86 people who do the job, July 2015 18. Connect pipes between vats and processing equipment. Supplemental task · Task 12367 · Rated by 86 people who do the job, July 2015 19. Assemble fittings, valves, bowls, plates, disks, impeller shafts, or other parts to prepare equipment for operation. Supplemental task · Task 20828 · Rated by 86 people who do the job, July 2015 20. Remove full containers from discharge outlets and replace them with empty containers. 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