How to choose the right ultra-pure water machine?

At present, the current situation of customers' selection of ultrapure water machines in the market

Most laboratory personnel are vague about the water quality and water quantity required for their own experimental projects, and they are not very clear about how to choose an ultrapure water machine.

Ordinary salespersons usually only rely on the customer's quotation and budget to sell the machine when they do not really understand the customer's water demand, or directly ask the laboratory personnel to passively recommend the water quality and water quantity required and passively quote, often It is sold to sell water machines, so the selected models often encounter the following problems during use.

1. The water quality of the produced water is not up to the standard, and the cause of the water quality change cannot be traced through the water machine, and the solution can be determined through analysis.

2. Bacteria in the Water Tank

3. The ultrapure water machine can't get water out

4. When the water demand increases, the existing water machine cannot meet the demand

5. The operation of the water machine is inconvenient, and the amount of information query is small. When the water machine alarms, the source of the problem cannot be checked and solved in time.

Aiming at the above problems in the selection of principles

1. Choose an ultra-pure water machine that monitors the water quality of the produced water, and each unit of the ultra-pure water machine has monitoring points, so that you can check the operating status of the system at any time, and the expiry of  consumables can be automatically reminded, and you can quickly check when the water quality is not up to standard to the cause and find a solution. The queried information can also be exported to view and analyze the corresponding situation of the water machine

2.  The selected Water Tank can filter air pollution and is easy to clean. When the demand for water increases, the Water Tank can also be expanded.

3.  Choose a water machine whose water consumption can vary with changes in water demand. When the water consumption becomes larger, corresponding components can be added to meet the water demand.

4.  It is more convenient to choose the touch screen operation, and it is better to complete the operation within three steps.

How to choose the right ultrapure water machine?

1. Water quality requirements

2. Water requirements

3. Raw water quality (TDS, turbidity, pressure, PH value, hardness) status

4. Other factors (operating interface, appearance, budget)

The following is a further introduction and analysis of each factor:

1) Water quality requirements

Different units will have different laboratories, and different laboratories have different experiments or test items. Therefore, before choosing an ultrapure water machine, you must first understand which field the experiment or test item belongs to, and you need to use it. To which type of experimental equipment, and finally determine the water quality requirements of the experimental equipment.

2) Water demand

Daily water consumption of pure water: Refers to the total amount of pure water that needs to be used every day.

Daily water consumption of ultra-pure water: refers to the total amount of ultra-pure water that needs to be used every day.

Pure water peak water consumption: refers to the maximum amount of pure water that needs to be used at one time.

Peak water consumption of ultrapure water: refers to the maximum amount of ultrapure water that needs to be used at one time.

* Principles of daily water consumption selection:

The daily water consumption of pure water or ultrapure water is limited by the water production capacity of the machine (that is, the water production volume of RO membrane). The daily water production of the RO membrane should be greater than the larger of the daily water consumption of pure water and the daily consumption of ultrapure water.

* The principle of peak water consumption and Water Tank selection:

1. The peak water consumption is directly affected by the water storage capacity of the Water Tank, so the peak water consumption determines the size of the Water Tank.

2. A Water Tank with a larger capacity must be able to meet the demand for smaller peak water consumption, but it is necessary to avoid choosing a Water Tank that is too large, because a Water Tank that is too large will easily cause the quality of pure water to deteriorate due to long-term storage.

3. Since the Water Tank is easy to grow bacteria and pure water is easy to be polluted by air, it is necessary to choose a Water Tank that is easy to clean and not easy to breed bacteria, can filter air pollution, and can be expanded with the increase of water demand.

*Purification column quantity selection principle:

A. If the amount of pure water is large and the amount of ultrapure water is small: 

First of all, you should choose a model with a large water production capacity to meet the pure water consumption. When selecting a large water production model, you must also ensure the water quality of the pure water. Therefore, it is necessary to choose two-stage reverse osmosis. At the same time, because the amount of ultrapure water is small, you should choose a model with fewer purification column modules.

B. If the amount of pure water is small and the amount of ultrapure water is large:

First of all, the exchange volume of the selected model (the amount of ultrapure water that can be processed by the purification column) is greater than the water consumption of ultrapure water. (The machine is calculated based on 10 hours of working time per day)

Then, because of the large amount of ultrapure water, you should choose a model with a large number of purification column modules. The same purification column should be selected with a large resin filling capacity.

3) Raw water quality status

At present, most ultrapure water machines use tap water as raw water to produce pure water and ultrapure water. The water quality of tap water will change with the change of natural climate such as weather and temperature, and the change of raw water will directly lead to the change of water quality of ultrapure water machine. Therefore, it is necessary to test the water quality of the raw water, and before selecting an ultrapure water machine, it is necessary to analyze the TDS, turbidity, pressure, PH value, hardness, etc. of the raw water to select a suitable ultrapure water machine.

The water machine uses two-stage reverse osmosis to ensure that the pure water reaches the national laboratory's third-grade water standard, that is, it is stable at less than 5 us/cm. The product water of the secondary reverse osmosis enters the purification unit to ensure that the product water of ultrapure water is more stable. Therefore, when choosing a water machine, it is better to choose a two-stage reverse osmosis system, which can better ensure the stability of the water quality.

4) Other factors

A. It is more convenient to operate the operation interface by selecting the touch-type operation mode, and choosing a water machine that can query the operating status of the system in all aspects can quickly find a solution when the system fails.

B. The budget determines the series of selected water machines.

C. If there is a requirement for the appearance, of course, you can choose a water machine with a more fashionable and beautiful appearance.