the diaphragm valve is a special kind of block valves, the opening and closing is a diaphragm made with soft materials, it will be separated from within the body cavity with the valve cover cavity. The diaphragm valve is but actually & other; Clamps & throughout; , a flexible, it can be one of the diaphragm, bolting in compression, the compression is operating by the stem and move up and down, when the compression a rose, the diaphragm is exalted, pathway, caused when compressed dropped, diaphragm pressure on the dam body ( If for the weir valve) Or pressure in the bottom of the outline ( If for straight-through) , the diaphragm valve is suitable for the switch and the throttle. British standard diaphragm valve working temperature is usually affected by the diaphragm and the valve body lining material used to limit and its working temperature range is about - 50 ~ 175 degrees. Diaphragm valve has simple structure, only by the body, the diaphragm and cover assembly of three main parts. The valve is easy to be fast disassembly and maintenance, replacement diaphragm can be done in the field and in a short period of time. Operating mechanism and medium pathways between the diaphragm Industrial Valves applies not only to food and medical industry, but also suitable for some difficult and dangerous medium. More artificial synthetic rubber and the application of engineering plastics, as well as the more widely choose body lining material, make diaphragm valve in the widely applied to every field of modern industry. National standard rubber lining, lining fluorine diaphragm valve itself the cause of the structure design, suitable for Yu Chaochun medium or severe pollution, very sticky liquid, gas, corrosive or inert medium. Combined with control equipment, the national standard of rubber lining, lining fluoride diaphragm valve can replace the other traditional control system, especially applicable to solid inert medium and pollution. Products are mainly applied in biological pharmacy, food, industry; And electric power, chemical, electroplating, etc in industrial water treatment, has been used in the semiconductor wafer production, diaphragm valve is particularly applicable to transport corrosive, a viscous fluid, such as mud, food, medicines, woven d glue liquid and so on, due to the pipeline, diaphragm valve operating agencies, it is not exposed to the delivery of fluid, so is not contaminated, also do not need packing, stem packing department is not likely to leak. British standard rubber lining, lining fluorine diaphragm valve principle is the body's regulation, when the entrance pressure, automatically reduced size, reduced the change of the flow, and vice versa. If the reverse, the regulation system doesn't work. Regulation and the function of the valve, is a directional, even can reduce even closed reverse pressure flow. Since the installation of diaphragm valve is to better heating, there is no reverse loading problem. If it is the outfit, it is human error, of course will be correct. Works by changing the clearance between the valve core and valve seat ( The opening) , change the flow resistance of fluid flow through the valve, to achieve the purpose of flow adjustment. Diaphragm valve is equivalent to a throttling element of local resistance to change of incompressible fluid, the flow equation is available. Kv for once-through lining rubber diaphragm valve valve coefficient. It is defined as: when the once-through rubber diaphragm valve differential pressure is 1 bar (before and after About 1 KGF/cm2) , through the diaphragm valve flow values ( m3 / h) 。 Once-through rubber diaphragm valve fully open the valve coefficient is equal to the average flow capacity of the valve. If a balancing valve opening is kept constant, the valve coefficient Kv unchanged, that is to say, the valve coefficient Kv by opening. Obtained from the measured coefficient under different opening valve, diaphragm valve can be as a quantitative flow adjusting throttle element. In network debugging diaphragm, diaphragm valve hose will be debugging small pressure valve connected with special intelligent instruments, instrument can display the flow through the valve flow values ( And the pressure drop values) , with the instrument the man-machine dialogue, to input data to the diaphragm valve requirements of flow meter value, instrument through calculation and analysis, it is concluded that a balanced hydraulic pipeline system the opening value of the valve. Diaphragm valve belong to the category of control valve, the working principle of internal thread diaphragm valve is by changing the clearance between the valve core and valve seat, change the flow resistance of fluid flow through the valve, to achieve the purpose of flow adjustment. 1. Should not arbitrarily change the diaphragm valve opening of pipeline system is installed, and after test conditions, using a dedicated smart meters to debug setting of all diaphragm valves, and lock the Industrial Valves opening, the balance of pipe network to realize the condition. In the process of pipe network system normal operation, should not arbitrarily change the diaphragm valve opening, especially should not change the opening the lock. 2. Don't have to stop valve installation, troubleshooting a loop, the loop on the diaphragm valve can be closed, the diaphragm valve have the effect of cutting cut-off valve flow, reply again after the repair to the original lock position. So installed diaphragm valve, just don't have to install cut-off valve. 3. System set up ( Or cancel) The loop should be readjusted when added in the setting in the pipe network system ( Or cancel) When the loop, besides should increase ( Or close) Corresponding diaphragm valve, in principle, all new diaphragm valve and the original system loop in the diaphragm valve shall be readjusted setting ( The original loop branch pipe diaphragm valves do not have to readjust) 。 As distribution in air conditioning and heating system, the energy of the water cycle system of hydraulic balance is very important.

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