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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
32ºC (90ºF)
82ºC (180ºF)
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.
DB6, 6H, 7, 8, 9,10 Capabilities
•
Maximum Working Pressure: 80 psi (5.5 bar)
•
Maximum Viscosity:
•
Maximum Temperature:
•
Solids:
Minimum Allowable Flow Rate
Do not allow the flow rate to drop below the minimum flow rate listed in the chart below.
3450 rpm
1/2 gpm (1.9 lpm)
Maximum Allowable Motor Power
Do not exceed the maximum power rating for the pump coupling. Standard coupling for the DB6, 6H & 7 is 6-pole; standard coupling for the
DB8, 9 & 10 is 8-pole.
· 6-pole coupling = 1/2 horsepower (0.37 kW)
· 8-pole coupling = 1 horsepower (0.75 kW)
· 10-pole coupling = 2 horsepower (1.50 kW)
Maximum Noise Level
69 dBA (Pump only)
Temperature
Temperature
Class
52ºC (125ºF)
T6
81ºC (174ºF)
T4
93ºC (200ºF)
T4
150 cP
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 infrequent particles. Maximum hardness
is 80 HS. Maximum concentration is 10% by weight. If solids are being pumped, it is recommended that the
pump have either ceramic or for best results, silicon carbide components. Pumping solids may lead to increased
wear.
1725 rpm
1/4 gpm (.95 lpm)
Maximum Allowable
Surface Temperature
85ºC
135ºC
135ºC
2900 rpm
1.9 lpm (1/2 gpm)
9
1450 rpm
.95 lpm (1/4 gpm)
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