Finish Thompson DB22 SERIES - Manual (Page 6)

6
Maximum Specific Gravity for Non-Overloading Applications
3450 rpm (60 Hz)
Closed Impeller
Diameter
Maximum
Specific Gravity
7.25” (184.2 mm) 1.0
7” (177.8 mm) 1.1
6.5” (165.1 mm) 1.5
6” (152.4 mm) 1.8
5.5” (139.7 mm) 1.8
5” (127.0 mm) 1.8
4.5” (114.0 mm) 1.8
2900 rpm (50 Hz)
Closed Impeller
Diameter
Maximum
Specific Gravity
184.2 mm (7.25”) 1.35
177.8 mm (7”) 1.6
165.1 mm (6.5”) 1.8
152.4 mm (6”) 1.8
139.7 mm (5.5”) 1.8
127.0 mm (5”) 1.8
3450 rpm (60 Hz)
Open Impeller
Diameter
Maximum
Specific Gravity
6” (152.4 mm) 1.5
5.5” (139.7 mm) 1.8
5” (127.0 mm) 1.8
4.5” (114.0 mm) 1.8
2900 rpm (50 Hz)
Open Impeller
Diameter
Maximum Specific
Gravity
181.0 mm (7.13”) 1.35
177.8 mm (7”) 1.5
165.1 mm (6.5”) 1.75
152.4 mm (6”) 1.8
139.7 mm (5.5”) 1.8
Maximum Working Pressure: 90psi (6.2 bar)
Maximum Temperature: Polypropylene -180º F (82º C); PVDF – 220º F (104º C)
NOTE: Maximum temperature is application dependent. Consult a chemical resistance guide
or the chemical manufacturer for chemical compatibility and temperature limits.
Solids: Maximum particle size is 100 microns for slurries and 1/64” (.4 mm) for occasional solids.
Maximum hardness is 80 HS. Maximum concentration is 10% by weight.
NOTE: If solids are being pumped, it is recommended that the pump have silicon carbide components for best results.
Pumping solids may lead to increased wear.
Minimum Allowable Flow Rate - Do not allow the flow rate to drop below 10 gallons per minute (2.3 m3/hr).
Maximum Noise Level: 80 dBA
Maximum Allowable Motor Power
Do not exceed 7.5 kW (10 horsepower) for 50 Hz, 2900 rpm applications. For 60 Hz, 3450 rpm applications, the pump is capable of
starting a 15 horsepower motor but is limited to a maximum of 13 horsepower (9.7 kW) while running. Use the information in the
chart below to determine the maximum specific gravity capabilities by impeller trim for non-overloading applications. The use of a
power monitor is strongly recommended for 60 Hz applications above 10 horsepower (7.5 kW).
DB22 Capabilities