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Engineering Equipment

With the transition of municipal economy to a market economy the choice of engineering equipment acquired great importance. Today, the operating organization and HOAs are faced with the need for careful planning their budgets. Modern methods of assessing the value of equipment based on an analysis of its three main components: the initial price, operating costs and expected savings (the effect of the application). Many writers such as Western Union Company offer more in-depth analysis. However, in practice, often the selection criteria are only the first and last performance, and sometimes even just the price. "In the forehead," the most primitive of the currently used to estimate the cost of equipment or Project methodology used to calculate the payback time of initial costs. For example, it helps to understand for many years, the savings would cover the cost of equipment and the cost of its installation. This method called the SPB-method (of Simple Payback – simple payback).

There is also the notion of discounted payback (Discounted Payback or DPB), which takes into account the depreciation of money over time. It is unlikely that such methods can be regarded as exhaustive, because, in practice, low cost equipment may be too expensive to operate. Therefore, the technique spb and dpb is often called the "bait technique for fish (fish bait), since they allow you to demonstrate the attractiveness cheap solutions. Scope of application of these techniques is limited only rough comparative analysis of projects to exclude essentially impossibly options. Through a detailed analysis of its effectiveness increasingly popular in recent years has gained a method LCC-analysis or evaluation of life cycle cost of equipment (from Life Cycle Cost).

Mga Oil

On the Russian territory should be used hydraulic oil specifically designed for fluid power drives and serially produced by domestic refineries: MG-15B gost 17479.3-85 (VMGZ tu 38.101479-00) and Mga-46V (MG-30 tu 38.001347-83), which according to gost 26191-84 "oils. Lubricants and special liquids (restrictive list and order of appointment), Annex 8 to gost 14892-69 "Hydrostatic drive for articles in the" northern "performance" and ost 22-1488-86 are the main varieties of fluids. Hydraulic oil MG-15B (VMGZ tu 38.101479-00) multigrade hydraulic thickened intended for use by mobile machinery and industrial equipment in areas with cold Climate (CL), preferably with an axial-piston pumps and motors, and seasonal – in winter with a gear-and vane pump. This oil is produced on the basis of thickened with a composition of additives, provide the necessary viscosity, low temperature and foaming properties. It provides start-up to the work of the hydraulic drive, without pre-heating and year-round operation of machinery and hydraulically equipment without the seasonal change in the temperature range from -53 to +53 C. Hydraulic oil Mga-46V (MG-30 tu 38.001347-83) is designed for operation of mobile hydraulic machinery and industrial equipment in the open air temperate areas (V) as a summer class and in all seasons for areas with warm climates (T) in the range of temperatures from -20 to +75 C. Its oil is produced from selective treatment with the addition of antioxidant, antifoam additives and depressatora, which lowers the freezing temperature.

The oil has good lubricating properties, resistance to oxidation and deposition of tar deposits, and also against foaming satisfactorily protects metal surfaces from corrosion. Frequency of replacement of the main varieties of hydraulic oils – in 3500 4000 h, but at least once in 2 years. In the absence of major varieties hydraulic oil is allowed to seasonal change: in the winter – MG-22A (AC) in the summer – I-30A. Before the first start of the pump in the work necessary to complete all components of the hydraulic system – pumps, hydraulic cylinders, filters, heat exchangers – the fluid, while ensuring that production of air through the tube or fitting drain pipes until the outer leak.