DUV-A Series

Series description

LIT DUV-A systems are applied to potable water disinfection.

The models of this series were developed based on high-efficiency low-pressure amalgam lamps and have all components integrated in a compact stainless steel chamber and separate electrical cabinet.

DUV-A units were designed and are manufactured according to international standards for UV disinfection of potable water such as DVGW 294.

Technical specifications

* (400 J/m² at 98% water transmittance at the end of lamp life)

Application

IT DUV-A series units are applied to water disinfection at:

• Household and municipal water supply systems;
• Industrial enterprises;
• Sea-water treatment systems;
• Swimming pools;
• Pharmaceutical industry;
• Food and beverage factories;
• Hospital, hotels and restaurants;
• Electronic industry.

Advantages

• Reliable disinfection with low energy consumption;
• High-power amalgam lamp technology;
• Continuous UV monitoring and control by a highly selective calibrated UV sensor;
• Extended lamp operating lifetime;
• Easy operation and maintenance;
• Compact design in combination with large flow capacities;
• High reliability and long service life of reactor body and system components.

Principle of operation

UV reactor of DUV-A units has longitudinal geometry with side inlet/outlet flanges. Water enters the reactor and is exposed to germicidal radiation, which destroys bacteria and viruses. The UV lamps are isolated from treated water by special high quality fused quartz sleeves with a high transmission coefficient for ultraviolet radiation (95%). After UV treatment water doesn't contain microorganisms dangerous to health and is instantly ready for use.

UV Dose

DUV-A units ensure high UV dose in a wide range of water transmission values. The minimal required dose is guaranteed over the lamp life taking into account lamps aging and quartz sleeves fouling.

UV lamps

All units are equipped with modern, industrially manufactured amalgam lamps having long a service life and enhanced UV-C output. Low depreciation of UV-radiation intensity at the end of lamp life guarantees effective disinfection during the whole operation period of DUV-A units.

UV sensor

As required by the Russian Hygiene Governmental Authority and DVGW regulations all DUV-A units are equipped with UV-radiation intensity sensor, it allows the UV dose to be monitored continuously and alarm signals to be generated when the UV dose drops lower than the necessary level.

Control Cabinet

Proper operation of UV system is provided by a control cabinet according to the table above. LIT DUV-A systems are supplied with two types of control cabinet described below.

Cleaning system

Standard delivery package of all LIT DUV-A units includes a special chemical cleaning system for regular washing of the disinfection chamber and quartz sleeves. Chemical cleaning system consists of stainless steel tank, water pump and set of pipes. The tank is used for preparation of cleaning solution. The water pump provides circulation of water mixed with cleaning solution through the chamber. The 0.2%aqueous solution of citric or oxalic acid is used for periodical cleaning (once 2- 3 months) of the disinfection chamber. The chemical cleaning method provides effective removal of fouling from quartz sleeves and inner walls of the disinfection chamber and requires minimum labour and material resources.