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Practical Application of Constant Flow Regulating Valve in Heating Pipe Network
Overview In centralized heating or central air conditioning in circulating water pipe network system, there is a widespread problem of hydraulic imbalance, due to the different resistance and coupling between the various loops of the association, resulting in the flow of transmission and distribution is difficult to balance, regulation Resulting in poor quality of system operation, inaccurate and unstable flow control, unbalanced heat and cold on the client side, forced to adopt large-flow operation, serious energy waste and many other problems. The main reason is not accurate and reliable, easy to use, low cost flow control equipment. Constant flow control valve is designed to overcome the above problems and development of special control equipment, it can accurately and reliably flow control and transmission and distribution, the elimination of hydraulic imbalances. In central heating or central air-conditioning circulating water pipe network system, the constant flow control valve installed in the customer end of each loop, according to the user's rated flow set the opening, you can achieve the balanced distribution of the entire pipe network system to ensure that System traffic transmission and distribution of balance and stability, improve operational quality, energy-saving operation. No special debugging techniques and instruments, adjust the settings simple, intuitive, fast and reliable. In central heating of a water or central air-conditioning building automation system, equipped with a valve actuator constant flow control valve can ensure that the system flow control stability, accuracy, reliability, improve operational quality and reduce the number of valve actuators and Extend its service life. According to relevant data, it is shown that in the district heating system, a reasonable and balanced transmission and distribution flow can achieve 15-20% more energy saving and coal saving after the hydraulic balance is achieved, which is equivalent to reducing the operating cost per square meter of building area per heating season by 0.5 Yuan or more; due to solve the heating pipe network transmission and distribution of unbalanced problems, so long-term end-user room temperature is not hot, both to reduce user complaints, but also increase the charging rate, but also can give full play to the existing boiler water pump Ability to expand the area of ​​heating and heating, economic and social benefits are impressive. Constant flow control valve Constant flow control valve is a function of constant flow control valve, which is self-pressure control device and flow control device combination of the valve, the working principle is: with the pressure control device, and control Stable flow control device before and after the pressure difference, so that before and after the valve pressure is greater than the constant current starting value, the flow through the valve no longer with the pressure before and after the change in the pressure control within a certain valve The opening of the flow can be automatically maintained constant flow changes can be achieved by adjusting the valve opening, with the pressure before and after the valve has nothing to do. The same working principle of the valve, some known as "dynamic balance valve", some called "self-flow controller" or "self-flow control (control) valve", they have a certain constant flow function, Range, structure volume, maintainability, materials and prices vary greatly.