Pressure reducing valve is a kind of special device, reduce the working pressure pipeline automatically, it can be by high water pressure reducing valve before pipe to the valve pipe after the required level. Pressure reducing valve is widely used in high-rise buildings, the area of urban water supply pipe network pressure is too high, mines and other occasions, to ensure that each water point in water supply system water pressure and flow to have the appropriate services. In view of water leak rate and degree of waste almost as the water pressure is directly proportional to the size of feed water system, thus reducing valve have improve system operation condition and potential water-saving effect, YK43XF gas pressure reducing valve according to statistics, the water-saving effect is about 30%. The structure of the pressure reducing valve type many, common in the past have a spring in the diaphragm, piston, etc. Within the basic principle of the pressure reducing valve by Industrial Valves port on the local resistance to reduce the water pressure, water pressure drop by connecting disc film or the scope of import and export pressure difference on both sides of the piston automatic adjustment. Since 2007, appeared some new type pressure reducing valve, YK43F stainless steel gas pressure reducing valve, such as constant ratio type pressure reducing valve. Constant ratio reduced pressure principle is to use the body of the floating piston hydraulic pressure ratio control, import and export side pressure ratio is inversely proportional to the import and export side piston area ratio. The pressure reducing valve work smoothly without vibration; The body without the spring, so no spring rust, metal fatigue failure were evident; Good sealing performance, leakage and dynamic pressure reduction (both The water flow) And static pressure reduction ( When traffic is 0) ; Especially in relief at the same time does not affect the water flow. Setter in A non-working state, the air input of the compressed air after filtering filter 1 into A room and huotang legally. The main valve core 19 20 and air pressure down in spring on the seat, make the room A and B room disconnect. To enter A room air flow through the valve of the mouth ( Also known as valve) 12 to F room, 13 after decompression, through constant orifice into the G and D chamber, respectively. Because at this time has not yet been 8 strength of diaphragm, damper between 5 and 4 nozzle spacing is bigger, when air flows out from the nozzle 4 air flow resistance is small, G and D chamber air pressure is low, diaphragm keep original position 3 and 15. Into the room only trace gases mainly through B chamber through the valve port 2 discharge from the vent; Another part from outlets emptying. Outlet at this time, no air output, the nozzle flow and emptying of trace gases are necessary to maintain nozzle baffle device work, for it is no power consumption volume, so I hope its consumption as small as possible. Basic performance, 1) Regulating range: it refers to that the adjustable limit of the pressure reducing valve output pressure P2, within the scope of the requirements of pressure reducing valve to the specified precision. Regulating scope mainly related to pressure regulating spring stiffness. ( 2) Pressure feature: it refers to the flow fixed value for g, caused by the input pressure fluctuation characteristics of the output pressure fluctuations. The smaller the output pressure fluctuation, the characteristics of the pressure reducing valve, the better. The output pressure must be less than the input pressure - Constant value was basically not changes over the input pressure. ( 3) Flow feature: it refers to the input pressure - Timing, the output pressure changes along with the change of output flow g resistance. G when the flow changes, the output pressure changes as small as possible. Generally the lower the output pressure, which fluctuates according to the change of output flow.
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