Water Well Journal
Issue link: http://read.dmtmag.com/i/728580
Table 3. Specific Speed Ranges Typical type of specific Nominal Flow range Head at BEP (1) speed range pump (N S ) speed (RPM) at BEP (in GPM) (in feet) Centrifugal-end-suction 1200/1800 20–100 50–100 300–1000 (Low capacity, low head) Centrifugal-end-suction 1200/1800 100–1000 50–100 600–3000 (Moderate capacity, low head) Centrifugal-end suction 1200/1800 >1000 50–100 1300–4000 (High capacity, low head) Centrifugal-end-suction 1800/3600 100–1000 100–300 250–3000 (Moderate capacity, moderate head) Centrifugal-end-suction 3600 20–100 >300 200–500 (Low capacity, high head) Centrifugal-end-suction 3600 100–1000 >300 500–1800 (Moderate capacity, high head) Centrifugal-end-suction 3600 >1000 >300 1000–3000 (High capacity, high head) Vertical Turbine Pump 6-inch-diameter bowl 1800 50–250 10–17/stage 2000–5000 8-inch-diameter bowl 1800 100–600 20–30/stage 1800–5000 10-inch-diameter bowl 1800 150–1500 25–50/stage 2000–6500 11/12-inch-diameter bowl 1800 350–2000 40–60/stage 2500–5000 13/14-inch-diameter bowl 1800 600–2800 60–100/stage 1500–4500 15/16-inch-diameter bowl 1800 1000–4000 80–120/stage 1500–4500 18/20-inch-diameter bowl 1200/1800 3000–8000 80–140/stage 1600–6000 Submersible Pump 4/5-inch-diameter pump 3600 5–250 10–30/stage 500–6000 6/7-inch-diameter pump 3600 30–750 20–70/stage 1000–6000 8-inch-diameter pump 3600 150–1200 60–100/stage 2000–5000 9/10-inch-diameter pump 3600 300–1500 120–200/stage 1600–4000 11/12-inch-diameter pump 3600 600–2500 150–250/stage 1800–4500 (1) Head is based on feet per stage at BEP where applicable. ENGINEERING from page 51 52 October 2016 WWJ waterwelljournal.com