There are four main methods of disinfection: mechanical, physical, chemical and combined, combining two or three of these methods. Mechanical method of disinfection is to remove and destroy contaminated sites, the physical – in the disinfection by heat treatment, ultraviolet, or other similar methods. Chemical method used most extensively and involves the destruction of toxins and pathogenic bacteria using a disinfectant. Disinfectant for use in each case is chosen depending on the subject of cleaning and the composition of the funds. Main types disinfectants, based on major active components: inorganic, organic, biologically active.
Inorganic disinfectant – a tool which is based on acid alkalis, phosphates or silicates. Visit Nobel Laureate in Economics for more clarity on the issue. In organic media used surface-active agent (surfactant), alcohol and other components. By biologically active funds are based on aldehydes, peroxides and other substances similar action. Disinfectant must meet the following requirements: highly soluble in water and be active even in small concentrations, have a fairly wide range and high speed action, low level of toxicity. Another quality that must have a modern disinfectant – No adverse impact on the object of cleaning (surface damage, discoloration, etc.). From the point of convenience and efficiency of use, disinfectant should be safe and convenient for transportation and storage, and still have not overcharge and concentration, permitting its use in small doses. As mentioned above, the disinfectant should be well soluble in water. Fluid rapid effect on bacteria, effectively destroys pollution and they contain dangerous toxic substances.
So are achieved and requirements to speed preparations. Therefore, the disinfectants are produced, usually in liquid or powdered form, which allows you to quickly dissolve them in water. Some liquid disinfectants do not form a foam, so the processing of multiple objects is accelerated. Foam disinfectants have a number of other benefits. Due to saturation of water and air foam quickly penetrate the contaminated layer, the longer it is delayed, and thus facilitates the disinfection process and increases its effectiveness.
Brief description of the cable APvV APvV Power cable is designed for transmission and distribution of electric power in stationary installations, the ac voltage 10, 20, 35 kV, 50 Hz for networks with isolated or grounded. Cable Construction APvV APvV power cable comes with an aluminum housing multiwire corresponding to class 2 according to gost 22483-77. Surface veins superimposed display of the extruded conductive peroksidosshitoy composition of polyethylene and polyethylene insulation peroksidnosshitogo. On the insulating layer is also superimposed screens: extruded conductive crosslinked polyethylene composition and Combined two-ply. The first layer of superimposed coil, made of conducting paper tape or conductive polymer tape thickness not less than 0,2 mm. The second layer is made of copper naviv wires with a nominal diameter 0,7-2,0 mm, over which is superimposed spiral copper tape with a minimum thickness of 0,1 mm and a width of not less than 8 mm. This is followed by separating layer of two strips of crepe paper or cable or rubberized fabric thickness of not less than 0,2 mm, as a protective element provides the shell of pvc plastic.
Technical and operational characteristics of the cable, power cable APvV APvV can be operated at ambient temperatures from -60 C to +50 C and a relative humidity of 98% at temperatures up to +35 C. In operating mode, the maximum allowable temperature for a long time of heating cable cores to + 90 C, while in emergency mode, or under overload conditions, its value may reach + 130 C (heating duration is not more than 8 hours per day and 1000 hours for the entire period of service). Short-circuit (up to 4 seconds), the maximum permissible temperature of conductors + 250 C and heating copper cable screen 35 C. Under the terms of nevozgoraemosti cable APvV its ultimate temperature of heating wires short-circuit is 400 C. Cable installation APvV without preheating at a temperature not below -15 C (for cables with pvc jacket) and not less than – 200C (for cables with plastic insulation). Minimum bend radius – 15 Dn, using special templates – 7,5 Dn (Dn – outer cable diameter). Building length cables stipulated in the order. The service life of cables APvV under normal operating conditions – 30 years old, lifetime warranty – 5 years. Scope APvV cable Power cable APvV used for fixed wiring in cable structures and industrial buildings, on roads without limitation difference levels. Allowed wiring in dry soils. With a single gasket APvV are self-extinguishing.