DB22_IOM_Manual

Section III - Start-up and Operation

Start-up and Operation

1. This pump must be filled from a flooded suction tank (gravity) or primed with liquid from an outside source. The DB22 is not self-priming.

2. Open the inlet (suction) and discharge valves completely and allow the pump to fill with liquid.

3. Close the discharge valve.

4. Turn the pump on. 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.

Shutdown

1. Use the following procedure to shutdown the pump.

2. Slowly close the discharge valve.

3. Turn off the motor.

4. Close the suction valve.

Section IV - Maintenance

Recommended maintenance schedule

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.

Flush Systems

CAUTION: Some fluids react with water; use compatible flushing fluid.

1. Turn off the pump.

2. Completely close the suction and discharge valves

3. Connect flushing fluid supply to flush inlet valve.

4. Connect flushing fluid drain to flush drain valve.

5. Open flushing inlet and outlet valves. Flush system until the pump is clean.

Optional Drain Installation

1. Remove the impeller housing (item 1) from the pump assembly.

2. Clamp the impeller housing to a drill press table.

3. Using a 7/16” drill and the molded boss as a guide, drill completely through the molded boss into the interior of the impeller housing.

CAUTION: Do not tap too deep or the impeller housing may be damaged.

4. Using a ¼” NPT tap, tap the hole in the molded boss to the appropriate depth.

5. Install the drain plug or valve, being careful not to overtighten.

Disassembly

WARNING: Rotating Parts. This pump has components that rotate while in operation. Follow local safety standards for locking out the motor from the power supply during maintenance or service.

WARNING: Chemical Hazard. This pump is used for transferring many types of potentially dangerous chemicals. Always wear protective clothing, eye protection and follow standard safety procedures when handling corrosive or personally harmful materials. Proper procedures should be followed for draining and decontaminating the pump before disassembly and inspection of the pump. There may be small quantities of chemicals present during inspection.

WARNING: Magnetic force hazard. This pump should only be disassembled and assembled using the recommended procedures. The magnetic attraction is powerful enough to rapidly pull the motor end and the wet end together. Do not place fingers between the mating surfaces of the motor and wet ends to avoid injuries. Keep the drive magnet and impeller assembly away from metal chips or particles.

Stop the pump, lock out the motor starter, close all the valves that are connected to the pump, and drain/decontaminate the pump.

WARNING: The pump must be thoroughly flushed of any hazardous materials and all internal pressure relieved prior to opening the pump. Allow the pump to reach ambient temperatures prior to performing maintenance.

1. Secure the pump/motor to the bench with the adapter foot hanging over the edge. Remove (4) 1/2” socket head cap screws, lock washers and flat washers (items 14, 15, 16) securing the pump to the motor. Use 3/8” Allen wrench or

3/8” hex socket on universal joint.

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