Monthly Archives: August 2016

//August

Choosing Pump Accessories (#7 of 8)

This is the seventh of eight articles in the series Sizing & Selecting the Right Chemical Metering Pump.

Most if not all of the metering pumps AquFlow sells is used as a part of a larger system to inject controlled amounts of chemicals into a process. That means that the other components in the system need to work well with the pump. These components that we often refer to as accessories, perform very important roles in ensuring the whole system works efficiently. AquFlow has done qualification testing to select the most suitable accessories that complement the pump perfectly. There are many accessories that can be used. Below is a list of the most commonly used accessories.

Suction Side Accessories:
1.) Calibration Column – This is a draw down tube which is used to calibrate the pump. It is mounted on the suction side of the pump   with a Tee and isolation valve. When the pump has started working, it is critical to see if the pump is set at the precise rate of flow       required by the process. This is done by shutting down the main suction line coming from the tank and drawing chemical only from     the calibration column. Additionally the draw down from this column also tells you about the effectiveness of check valves. If the       check valve is not sealing properly you will see a drop in the level and a slight bounce back. A good check valve will not show any   bounce back in the column after it drops.

2.) Strainer – All metering pumps are sensitive to particles caught in the check valve which may cause leak. It is usually       recommended to filter out such particles using […]