1. Equipment matching

knoll screw pumpIn the event of a failure in the middle of the night, maintenance personnel will do all they can to keep the equipment running, including using other parts than the original parts. Changes of this nature are very common. Although changes are made on a daily basis, they are not always documented and best paperwork practices are not always followed. The distributor must rely on the user's information to provide the right product. If accurate records are not kept, the likelihood of receiving the wrong product increases. For these reasons, keeping accurate records is crucial.

Many pumps are on their second or third application. They may come from a closed factory or a stopped process that finds its way to the bone field for use in another application at a later date. Pumps are used mainly because they are convenient; They are paid for and readily available. However, before reusing the pump in this way, users should question whether it is really the right product for that particular application. Misused pumps often require extensive replacement parts and associated labor, time, and cost, and can lead to downtime.

To avoid this trap, users should know if requirements have changed since the initial installation. They can check items such as viscosity, pH factor, temperature, delivered product, available net positive suction head (NPSH), supply type, discharge pressure requirements, and pipeline changes.

2, the efficiency of the pumping system is affected by the design layout of the pipeline

The answers to the following questions and subsequent corrective actions will help ensure maximum efficiency of the equipment.

● Does the pipeline diagram allow for optimal efficiency?

● Is the speed within the recommended range?

● Is the number of Ls (elbows), Ts, Ys and other accessories minimized?

● Are valves properly applied and kept to a minimum?

● Are the correct fittings used (e.g., eccentric and concentric reducers)?

● Is the pipeline in good condition? The accumulation of corrosion and wear results in higher flow resistance.

● Is the installation distance of accessories, valves, etc. not less than the minimum distance required for the screw pump?

● Is the pump optimally positioned to minimize running and all twists and turns?

● Are valves used to control flow rather than sizing the pump according to the operating point?

3, the pump must be in the best condition to obtain maximum efficiency

Many factors can affect the efficiency of a screw pump, such as unbalanced impeller, incorrect impeller size, misaligned coupling, incorrect parts or lubrication, and worn parts, which may include bearings, housings, wear rings, impeller, and rotors. One of the best ways to avoid problems is to catch them early through regular preventive maintenance.

4, in the new conditions of the appropriate size of the motor is essential

Can I replace another motor in case of motor failure? Is the motor losing efficiency? This is another example of the importance of using the right equipment. Too much or too little horsepower leads to inefficiency.

5. Monitoring pumps and systems is critical to long-term success

Inlet and outlet pressure gauges are inexpensive and provide a good indication of the operation of the system. The user should set the required NPSH on the inlet pressure gauge and the required discharge pressure on the outlet pressure gauge. Vibration analysis is another important tool for tracking pump operation and efficiency.

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