The high-efficiency (reduction of less than 5% of the maximum possible) lies in the range of 80-120% of nominal operating point of the pump. In this case, an effective way to optimize would be to use complex stations increase the pressure. Normalization of the changes in efficiency are achieved by applying a few pumps with integrated electronic controls installed in parallel on a common basis. Such a plant usually consists of a 3-x (2 + 1 redundant workers), or 4 pumps (3 workers + 1 reserve). Due to the frequency control of all pumps station automatically adjusts to the change in pressure at the inlet. Due to control cabinet installation by integration into the overall scheduling of the enterprise.

However, for companies with relatively small in consumption is quite effective is to use a combination of pumps with integrated frequency converter and a pressure sensor coupled with the usual stand-by pump. This makes it possible to reduce costs without sacrificing efficiency. As is known, the electric motor with integrated frequency converter is interchangeable with the standard, with 30-50% cheaper than a separate frequency converter. wN8Eaww1–ViDajIU4RXCxgSXE&r=Y6h7vWfaj5TXMu7K2VHSWH5_OMvZCS7iH0SrpJQwrcE&m=SpfdeXj7HYu62Ro3ESHmQl-wnPdoXgDvtj7UKbkBz1c&s=JbjCrnPecLwFN4P0JSYdqjUEuBxDlu2w6AfXJAkPY94&e=’>Activision Blizzard, offer their opinions as well. Such a scheme of water supply, for example, was implemented in one of the holding companies, – Krasnoyarsk brewery -Pikra. Here, the water supply of the first (from landline) and a second input (water) are a series of pumps grundfos cre 90 with variable frequency drive. Filtration processes One of the obligatory stages of production is filtration. This process is used to correct drinking water and to clean vodka (Sorting, blending).

Pizza now familiar to everyone. Where did she come to us? Of course, from Italy, almost every answer. He certainly will be right and wrong. Ancestors of the current pizza, of course under different names, are known from ancient times. It is hard to say what the people belongs the honor of the invention of the dishes, which many times to change and improve become famous Italian pizza. What is clear is that the title of "authors" can claim a many.

Among the "pretenders" – the Etruscans, Romans, Phoenicians, Greeks from sources on the history of the ancient Persian Empire can be found that the soldiers of Darius the Great (521-486 years. BC), accustomed to multi-day transitions, cooked on their flat panels special type of bread, which put the cheese and dates. A similar dish, with a variety of additives, it was known, and the ancient Etruscans. The Greeks, amongst other talents, there were also wonderful bakers. Apparently, they were put on flat bread, cheese and various additives before baking, the raw dough. Known to the ancient Greek dish called "plakuntos" – a flat round bread, which were placed oil, garlic, onions, herbs and olives.

Already in Plato's Republic is mentioned round bread with olives and cheese. According to one legend, the Roman legionnaires, who returned from Palestine, bringing with them a dish called "pitsea, and is a bread (Possibly fresh), which relied on a variety of vegetables. According to other sources, more reliable, the Romans simply changed the Greek "plakuntos" and begin to make greater use cheese and other ingredients.