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Flow-through UV sterilizers are a great choice for household water purification.

2022-08-17

Flow-through UV sterilizers are a great choice for household water purification.

　　 Flow-through ultraviolet sterilizer This product uses ultraviolet light in the wavelength range of 254 nm, which boasts excellent bactericidal efficacy in the UV spectrum. Experiments have shown that this UV light kills bacteria very rapidly, achieving a sterilization rate as high as 99.9% within a short period of time—effectively eliminating virtually all types of bacteria present in water. The product is made from 304 food-grade stainless steel, making it significantly safer than many water purifiers currently available on the market that use plastic or ordinary stainless steel materials. It won't cause secondary contamination of the water, ensuring that your drinking water is even more reliable and safe!

　　Most ultraviolet disinfection lamps have a service life of approximately 8,000 to 10,000 hours; higher-quality lamps can last up to 12,000 hours. However, some UV lamps may turn on but fail to reach their intended disinfection power. This is closely related to the ballast as well. Although certain ballasts can start the lamp, they cannot bring the UV lamp to its germicidal wavelength, thereby significantly reducing its disinfection effectiveness. That’s why we typically use specialized ballasts designed specifically for UV lamps to ensure that the lamps operate at the correct wavelength.

　　Ultraviolet sterilizers vary in lamp wattage, and consequently, their lamp wattages and lengths differ as well. For example, a 40W lamp has a length of 843mm, while a 120W lamp measures 1148mm, and so on. Therefore, even for sterilizers with the same power rating, different lamps are chosen, resulting in variations in the shape of the UV lamps. As a result, the sterilization effectiveness of flow-through UV sterilizers also differs—this primarily depends on the duration of time that water spends inside the sterilizer. The time required to inactivate different microorganisms using UV lamps varies, so it’s essential to select the appropriate model based on actual conditions.

　　The appropriate operating conditions for flow-through ultraviolet sterilizers are as follows:

　　1) Water temperature: 5–50°C; Ambient environment: -5–50°C; Ambient humidity: less than 93% (at 25°C).

　　2) Voltage of the flow-type UV sterilizer: AC 220V ±10V, 50Hz.

　　3) Drinking Water: The transmittance (T254) of water entering the UV sterilizer should be between 95% and 100%. When the raw water quality falls below the national drinking water standards—for example, if the color exceeds 15 degrees, turbidity exceeds 5 degrees, or iron content exceeds 0.3 mg/L—other purification and filtration methods should first be employed to ensure that the water meets the required standards before being treated with UV-C water treatment equipment.

　　4) Aquaculture water: Freshwater and seawater that has been filtered through sand filtration or other treatment methods.

　　5) Wastewater: According to the disinfection requirements, the water entering the ultraviolet sterilizer must have a transmittance (T254) of 40% at a depth of 1 cm. Other requirements must meet the Class II standards stipulated in the national “Integrated Wastewater Discharge Standards” GB8978-1996.

　　6) If the water to be treated does not meet the above requirements, appropriate pretreatment—such as coagulation, sedimentation, and filtration—should be carried out before it enters the UV sterilizer to remove various impurities from the water.

　　Ultraviolet sterilizers feature no dead zones, excellent light distribution, low energy consumption, flexible and convenient installation and removal, and no secondary pollution. Compared to chlorine-based disinfection, ultraviolet sterilizers do not require the addition of chemical agents, produce no secondary pollution, and eliminate the need for mixing equipment, thereby significantly reducing operational costs. Therefore, using ultraviolet sterilizers is safe—there’s no risk of adverse health effects caused by excessive chemical residues. With them, you can filter drinking water with even greater peace of mind.


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How to Choose a Flow-Through Ultraviolet Sterilizer?