NBVE line - flow UV- C germicidal lamps for air disinfection.
UVGI – Ultraviolet Germicidal Irradiation is a disinfection method that uses short-wavelength ultraviolet UV-C light to kill or inactivate microorganisms by destroying nucleic acids and disrupting their DNA, leaving them unable to perform vital cellular functions
Ultraviolet radiation (UV) is a part of electromagnetic spectrum similar to X-radiation, radio waves or visible light. For practical purposes the ultraviolet radiation has been divided into three bands:
UV-A radiation is contained in radiant energy from the sun. It activates photochemical and pigment-creating processes. Its erythemal effect is of no importance. UV-B radiation is used mainly in theraphy. It creates provitamin D and causes both pigmentation and erythemal effect. UV-C radiation has a strong germicidal and embryocidal effect. It can cause burning of the skin (erythemal effect) and inflammation of conjunctiva (con-juctival effect). UV-C radiation can be produced in germicidal lamps by a passage of an electric arc through a low-pressure mercury vapour (germicidal radiators). Radiation of a wavelength below 200 nm produces ozone in air. This is a harmful phenomenon. To prevent this noxious effect, the TUV germicidal bulbs, used in our lamps, are enlosed in an envelope made of special quartz glass which has high transmittance coefficient for germicidal radiation. It also absorbs undesirable UV radiation of a wavelength below 200 nm.
A - the greatest germicidal effect is obtained with the UV-C radiation within the wavelength region from 250 to 270 nm
B - curve of absorption of nucleic acids
C - cosmic radiaton by discharge in low-pressure mercury vapour.
Contaminated air is drawn by a fan – through a filter catching dust and other contaminations-into the disinfection chamber. The UV-C tube intensity and a time during which air remains in the disinfection chamber are selected so that air blown out from the lamp is practically free of microorganisms. Velocity of air flow through the disinfection chamber is therefore selected as a compromise between a desire to disinfect the greatest volume of air per time unit and germicidal effectiveness. It should also be noted that the forced flow of air results in a smooth circulation of air in the room and thus disinfection of air in the whole room.
Dual-function UV-C flow germicidal lamps with an external radiator of direct action guarantee a full range of disinfectant action. It gives a possibility of intensive disinfection of the air in the presence of people (UV-C flow chamber – function I) and direct disinfection of the whole room when the personell and patients stay outside the room (UV-C direct radiation tube – function II). Disinfectant action of the external radiator is similar to standard germicidal lamps NBV series. UV-C radiation disinfects the air and surfaces in the room (walls, table tops, objects, etc.) Thanks to its nature it also reaches different nooks as reflected light.
Both functions are independent of each other
The intended use of UV-C germicidal lamps:
Applying germicidal lamps is one of the most effective methods of disinfection. These devices emit the radiance UV-C about the length of the wave 253,7 nm. Radiance this has the strongest degradation proprieties of cools bacteria, viruses, moulds, mushrooms and all different micro-organisms.
Because of the large effectiveness of the germicidal lamps they are required sterility everywhere where the high quality of microbiological cleanness is required.
Areas of application:
The instruction of the use of the lamps contains the detailed description of ways and the methods of applying germicidal lamps.
Direct radiation UV-C lamps NBV series of Ultra-viol.
Selection of quantity and the power of lamps depends on many factors, as: the height of the rooms, his shape, the largeness of the coefficient of the reflection of the surface (walls) in the room, temperature, humidity and the degree of pollination of the air.
From the practical point of the sight:
In the room about alt . 2,5 to 3m. To get the clear effect of the disinfection of the air in the room we turn on the lamp from 2 to 8 hours. In dependence from destination of the room (the patient hall, medical study, surgical study, operating hall) the lamp (e.g. between two interventions) we turn on from 15 to 20 minutes.