Flow meter FlowVis Dn40 (50 mm glued) with non-return valve
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Flowmeter FlowVis Dn50 (63 mm glued) with non-return valve
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Flowmeter FlowVis Dn80 (90 mm glued) with non-return valve
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Flowmeter FlowVis Dn100 (110 mm glued) with non-return valve
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Flow meter TOP 1 1/2", range 4.6 to 13.5 m3/h
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TOP 2" flow meter, range 9.5 to 31 m3/h
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Flow meter TOP 2 1/2", range 18.5 to 57 m3/h
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Flow meter TOP 3", range 23 to 72 m3/h
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TOP 4" flowmeter, range 35 to 124 m3/h
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TOP 6" TOP flowmeter, range 69 to 215 m3/h
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TOP 8" flowmeter, range 140 to 400 m3/h
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SIDE 1 1/2" flowmeter, range 4,6 to 22 m3/h
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SIDE 2" flowmeter, range 9,5 to 31 m3/h
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SIDE 2 1/2" flowmeter, range 18,5 to 57 m3/h
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SIDE 3" flowmeter, range 23 to 72 m3/h
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SIDE 4" flowmeter, range 35 to 124 m3/h
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SIDE 6" flowmeter, 69 to 215 m3/h range
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SIDE 8" flowmeter, range 140 to 400 m3/h
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Questions and answers
what type of flowmeter is best suited for my pool?
Rotameter type flowmeters
- Installations with variable speed pumps.
- Community or public pools where flow control is required.
- Systems where a continuous visual reference of the flow is required.
Flow meters with flap valve (Flowis brand)
- Possibility of reading in smaller spaces.
- For pools with variable speed pump
- Medium size pools
where should I install the flowmeter in my system?
The ideal location is in the return pipe, after the filter and before the heater (if present). This ensures accurate measurements of the filtered water.
is it necessary to have straight sections before and after the flowmeter?
Some models require straight sections to ensure accuracy:
- Generally, 10 times the pipe diameter upstream and 5 times downstream are required.
- Models such as FlowVis do not require long straight runs and can even be installed between bends.
is it important that the flowmeter has a non-return function?
Yes, especially if you want to avoid reverse flow that could damage other components. Some models such as FlowVis DN50 include an integrated non-return valve.
what is the flow rate range that a flowmeter should measure?
A common mistake is to think that a flowmeter can be chosen only according to the flow rate we want to measure, without taking into account the diameter of the pipe where it is installed. However, it is essential to respect the correspondence between both factors.
Each flowmeter whether rotameter type or flapper valve type is designed for a specific pipe diameter, and its measuring range is calibrated according to the flow rate that can naturally flow through that pipe section.
Basic recommendation:
The flowmeter should be installed in a pipe of the same nominal diameter for which it is designed.
For example:
- If the installation has a Ø50 mm pipe, a flowmeter specifically designed for Ø50 mm should be installed.
- It is not recommended to install a Ø63 mm flowmeter in a Ø50 mm pipe, as this would result in a loss of measurement accuracy.
why is it so important to respect the diameter?
Because the water flow rate is directly related to the pipe cross-section. A flowmeter calibrated for a 50 mm pipe will have a typical measuring range of, for example, 5 to 15 m³/h. If the same flowmeter were installed in a larger pipe, it could receive a flow rate higher than its reading range, falsifying the data or even damaging the device.
what level of accuracy do I need in a pool flowmeter?
A common question when choosing a flowmeter is whether it is really worth investing in a high-precision model. And the answer is clear: we are not in a laboratory, so we do not need an ultra-precise measurement to the milliliter, but we do need a reliable and consistent reading with our installation.
why is it important to know the flow rate?
Knowing how many m³/h are circulating through our installation provides us with fundamental data to:
- Verify the performance of the pump.
- Check if the filter is working within its optimal values.
- Adjust the flow rate for automatic dosing systems or saline electrolysis.
- Detect possible performance losses due to dirt in the filter, semi-actuated valves or hydraulic problems.
what accuracy is sufficient?
With a margin of ±5 to ±10% in the reading, more than enough for:
- Make practical decisions.
- Make adjustments.
- Understand if we are below or above the flow rate recommended by the manufacturers of auxiliary equipment (UV, chlorinators, dosing pumps...).
In short, we are not looking for an exact figure, but a reliable reference value consistent with what should be happening in our installation.
what if I don't have a flowmeter?
In that case, it is all speculation. Many users assume that their installation works well "because it has always been that way", but the flow rate can vary considerably over time: pump wear, clogging, programming changes..
Having a simple flow meter is a small investment that saves a lot of headaches in the long run.
Pool Flowmeters: Accurate Water Flow Control for Optimal Maintenance
Swimming pool flowmeters are used to accurately measure the flow of water flowing through the hydraulic system. Thanks to their accuracy, ease of installation and usefulness in maintenance, they have become essential tools to ensure efficient filtration and controlled energy consumption.
They are especially useful for adjusting variable speed pumps, optimizing the performance of the filtration system or verifying that the minimum flow rate required by certain equipment (such as salt chlorinators or dosing pumps) is being met.
why choose flowmeters for swimming pools?
Choosing a quality flowmeter brings multiple benefits:
- Optimization of the filtration system: They allow you to adjust the ideal flow rate for optimal performance of filters, pumps and salt chlorinators.
- Energy savings: They help to detect overloads or efficiency losses, optimizing the use of the pump.
- Predictive maintenance: They facilitate the detection of obstructions or failures in the hydraulic system before they cause major problems.
- Longer equipment life: By maintaining a stable and controlled flow rate, premature wear of components is avoided.
how do pool flow meters work?
Flow meters work by means of a mechanism that measures the volume of water passing through a given point in the hydraulic system, generally expressed in liters per hour (l/h) or cubic meters per hour (m³/h). Depending on the type, they can be analog (direct reading) or digital (with display and additional functions), and can even be integrated with automation systems.
which flow meter do I need for my pool? Types and recommendations
At Quimipool we work mainly with two types of flowmeters: rotameters and flap valve flowmeters. Each one has its own particularities and is recommended according to the type of installation.
Rotameter flowmeters
- Rotameters are visual flowmeters that allow direct observation of the flow rate thanks to a floating part that rises according to the water flow.
- They are usually installed vertically, and are particularly useful for quick and intuitive readings.
Advantages of rotameters:
- Wide installation range: from small Ø50 mm pipes to high flow installations with diameters of 160 mm, 200 mm or even larger.
- Easy visual reading.
- High reliability in clean installations, with well filtered water.
- Easy maintenance
Typical applications:
- Installations with variable speed pumps.
- Community or public pools where flow control is required.
- Systems where a continuous visual reference of the flow is required.
Flowmeters with flapper valve (Flowis brand)
This type of flowmeter incorporates a flapper valve, providing a flow reading by displacement of an internal flapper. They are a more compact and discrete solution than the rotameter, and can be installed in different orientations (horizontal or vertical).
Limitations:
- Narrower installation range: more suitable for small or medium diameter pipes.
- Not recommended in high flow installations or with diameters greater than 110 mm, as accuracy decreases.
- Advantages:
Compact design.
- Possibility of reading in smaller spaces.
- For pools with variable speed pump
- Medium size pools
Conclusion
The choice of the right flowmeter depends on the type of installation and the intended use.
As a general rule:
- For large pools or public facilities, we recommend rotameters for their wider range of compatibility and ease of reading.
- For small to medium sized private pools, flow meters with flap valves (such as Flowis) may be a good alternative.
Key technical concepts explained
- Flow rate: The volume of water flowing through a pipe in a given time. It is usually measured in liters per hour (l/h) or cubic meters per hour (m³/h). It is the fundamental parameter for the correct dimensioning of the filtration system and to guarantee the efficiency of the water treatment.
- In-line / Insertion installation: Refers to the ways of mounting the flowmeter. In-line installation involves cutting the pipe and placing the device between the two ends. By insertion, on the other hand, a perforation is made in the pipe to insert a sensor, with less impact on the installation.
- Water velocity (MPS / FPS): This is the speed at which water moves through the pipe, expressed in meters or feet per second. FlowVis includes a color scale that alerts whether this velocity is adequate (green), moderate (yellow) or excessive (red), which helps protect equipment.
- Pressure drop: The reduction in pressure that occurs when water flows through the flow meter or other circuit elements. FlowVis stands out for offering one of the lowest pressure drops on the market, even below a 90° bend, which promotes hydraulic efficiency.
- Reading accuracy: Indicates the margin of error in the flow measurement. Models such as FlowVis have a certified accuracy of up to ±2%, making them ideal for installations where accuracy is required, such as salt chlorination systems or variable speed pumps.
