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Temperature Classification
The surface temperature of the DB Series pumps depends upon the temperature of the fluid that is being pumped. The following chart lists
different fluid temperatures and the corresponding pump surface temperature.
Fluid
Maximum Surface
Temperature
29ºC (85ºF)
77ºC (170ºF)
104ºC (220ºF)
Cleaning
The pump must be cleaned on a regular basis to avoid dust build up greater than 5 mm.
Motor Rotation Test
Pump must be full of liquid with no trapped air in the suction and discharge lines before the rotation of the motor is checked. Do not
operate pump until it is full of liquid.
Start up
The pump must be filled from a flooded suction tank (gravity) or primed with liquid from an outside source. Open the inlet (suction) and dis
charge valves completely and allow the pump to fill with liquid. Close the discharge valve. Turn the pump on and slowly open the discharge
valve. Adjust the flow rate and pressure by regulating the discharge valve. Do not attempt to adjust the flow with the suction valve.
Maintenance
The recommended maintenance schedule depends upon the nature of the fluid being pumped and the specific application. If the pump is
used on a clean fluid, it is recommended that the pump be removed from service and examined after six months of operation or after
2,000 hours of operation. If the pump is used on fluids with solids, high temperatures or other items that could cause accelerated wear,
then this initial examination should be sooner.
After the initial examination of the internal components and wear items are measured, a specific maintenance schedule can be determined.
For best results, it is recommended that the pump be removed from service annually for examination.
DB22 Capabilities
Maximum Working Pressure: 90psi (6.2 bar)
Maximum Temperature:
Solids:
Minimum Allowable Flow Rate: Do not allow the flow rate to drop below the minimum rate listed in the chart below.
3450 rpm (60 Hz)
1725 rpm (60 Hz)
10 gpm / 2.3 m
/hr
5 gpm / 1.1 m
3
Maximum Noise Level: 80 dBA (pump only)
Temperature
Temperature
Class
55ºC (131ºF)
T6
76ºC (168ºF)
T5
84ºC (183ºF)
T4
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.
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.
2900 rpm (50 Hz)
/hr
10 gpm / 2.3 m
3
Maximum Allowable
Surface Temperature
85ºC
100ºC
135ºC
1450 rpm (50 Hz)
/hr
5 gpm / 1.1 m
/hr
3
3
9
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