Pre-filtration is the first step in laboratory pure water equipment with tap water as the inlet water. It is mainly used to remove particulate matter impurities, residual chlorine and other oxidizing substances in raw water to prevent scaling, so as to ensure the purification efficiency and service life of the host.

A fresh reminder on the RephiTEKT pre-filtration system of the pure water system provided by Lefeng:
Replace your supplies when:

1. After the replacement of consumables, the use time is 3 months.
2. The difference between the inlet water pressure and the outlet water pressure is greater than or equal to 0.1MPa
I wonder if you have noticed?
Suppliers of laboratory pure water equipment often tell users to replace the pre-filter core regularly. Is this a fool of everyone? what is the reason?

To explain this problem, we must start with the basic working principle. Take the pre-filtered RephiTEKT provided by Lefeng as an example. The RephiTEKT pre-filter core is composed of deep-filtered PP cotton, activated carbon and high-efficiency anti-scaling agent.

The deep-filtered PP cotton fiber can remove colloidal impurities, sediment, rust, bacterial viruses and organic contaminated mineral impurities in tap water by physical adsorption.
Activated carbon filtration utilizes non-specific adsorption to remove various small molecular organics and strong oxidants.
The anti-scaling agent reacts with metal ions such as Ca2+, Mg2+, Cu2+, and Fe2+ in water to form a soluble chelate compound, thereby reducing hardness and inhibiting the growth of microorganisms.

It can be seen that both PP cotton and activated carbon use the adsorption principle . In the process of influent purification, the pollutants in the water will be adsorbed by the filter element, but each filter element has a fixed size, and the amount of the filter medium is certain, so the space for absorbing impurities is limited, when the adsorption sites of PP cotton and activated carbon After being occupied, according to the principle of balance, they no longer have the adsorption effect, but will release the source of pollution and harmful substances, and breed bacteria. If it is not replaced in time, it will not only purify the water, but will become a source of pollution and endanger the subsequent purification of the original (RO membrane, EDI module and refined purification column).

The same is true for anti-fouling agents. As the use time increases, the surface of the particles will be wrapped with contaminants, calcium scales, etc., reducing the treatment effect, and becoming a secondary source of pollution , beginning to release harmful substances.

Typically, suppliers of laboratory pure water recommend that users replace filter supplies every three months. The frequency of replacement is not only related to the time of use, but also related to the quality of tap water used, water consumption, etc., and the replacement period of the tap water quality is also shortened.

Lefeng's RephiTEKT pre-filtration system is equipped with two pressure gauges: monitoring the pressure at the inlet and outlet. When too much pollutant is adsorbed in the pre-filter core, the water outlet is gradually blocked, and the pressure difference between the water inlet and the outlet water will rise. This pressure difference also provides an effective basis for the replacement of consumables. With the two parameters of use time and differential pressure, is the replacement of the filter element more reliable?

Regular replacement of the pre-filter core is the necessary normal maintenance of the laboratory pure water equipment, which can guarantee the water quality and service life of the pure water machine, just like a car should be regularly maintained, and the oil is changed regularly! Develop a good water habit to be truly water-free!

About Shanghai Lefeng Biotechnology Co., Ltd. <br>Shanghai Lefeng is a manufacturer and supplier of water purification and laboratory separation and purification products with a deep technical background. At the beginning of development, Shanghai Lefeng has established the concept of respecting intellectual property rights and independent innovation, and actively established its own brand. At present, Shanghai Lefeng has become the most complete supplier of compatible products of Miriam Pure Water System in the world, and provides experiments. Room pure water system and laboratory sample preparation pre-treatment needle filter. Product quality and service are recognized by the market, and the products are sold to more than 80 countries and regions around the world.
For more information on RephiLe products, please visit:
Official Weibo: RephiLe Weibo Official Blog: RephiLe Blog
RephiLe Enterprise WeChat Name: Lefeng Pure Water Pure Water Hotline 400 690 0090

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