Meter Installation

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I want to install a water meter serving a water treatment plant on the abstraction line. The pumps at the abstraction are submersible.

Recently have had issues with meter clogging in other old abstraction points. So this time round, and since this is a new facility, I want to include a strainer before the meter and a non-return after the meter of the same size as the delivery pipe.

Also would like to adopt the above-ground setup. Would this bring any effect on discharge to the plant?

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5 Answers

  1. The water can install a strainer,and the meter need installed according to the installation method of upstraight pipe section 10D and downstraight pipe section 5D.

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  2. You will likely have a pressure drop due to the strainer and the eventual clogging thereof.  An increase in pumping energy may be the result if a constant flowrate is desired.  You might consider a setup to periodically backflush the strainer.

    1 Comment

    1. Noted. Thanks for your insights. 

  3. Hi Caroline, besides the suggestions made, the other aspcect to be considered for accuracy of the flow meter is the size of the flowmeter against volumetric pumping rate, this is usually provided by the manaufacturers One more option is to have a clamp on meter on the horizongtal section of the pipe, this sometimes requires calibration particluarly for raw water from river or a source with high SS . 

  4. Hello. If clogging is a problem what is causing this? A full bore meter with no interference with the liquid may be required. An electronic magnetic flow meter could be what you need. If the discharge pipe is full bore there are several manufacturers, e.g. ABB. If the discharge is occasionally part full then there are also electro-magnetic options, e.g. ABB part full meters. Hope this helps.

    1 Comment

    1. Mostly by small fish. the abstraction is an old dam and I suspect the a strainer/foot valve at the scour pipe inside the dam( if at all was installed) is not functional. An electromagnetic meter is a bit expensive and thought could use a mechanical meter.  

  5. Caroline Cheptoo , to get a good answer, some more information is required such as: what type of water meter is intended, what would the function of strainer. Usually, the water meter is installed on discharge pipe which has a non return valve. However, a short answer would be: any additional ancillary installed on suction or discharge pipe will create a head loss and a corresponding flow reduction. Maybe an ultrasonic flow meter will help. It is installed outside the pipe and no clogging will happen.

    2 Comments

    2. Thanks, Stefan for your response. The meter is a mechanical one. So wanted to have a strainer to prevent coarse material from passing through the meter. I will explore this option.