2014年6月25日星期三

The Factor safety control of steam valve

       Chinabase Machinery is a group of manufacturing facilities, offering one-stop solution for mechanical power transmission products in China. 
      Our product range also covers locking assemblies (clamping elements/locking device), taper bushes, QD bushes, bolt-on hubs, torque limiters, shaft collars, motor bases and motor slides, chain detachers, timing belt pulleys ,chain guides, universal joint, rod ends and yokes. 
     Hangzhou Chinabase Machinery Co., Ltd specializes in manufacturing all kinds of v belts, rubber timing belts (synchronous belts), auto timing belts, double-sided tooth synchronous belts, s step less speed change belts, multi-wedge belts, motorcycle V-belts, auto V-belts and various cutting V-belts, flat belts etc rubber drive belts and its auxiliary pulley series products.
     The safety rate control
     Steam as the two energy important, has been widely used in many industrial fields. The consumption of coal accounts for theproduction of steam system of 1/3, has become an important field of energy consumption. The steam trap is an important guarantee ofsteam to the normal operation of equipment, is the condensation of water recycling, energy conservation an important self operated control valve. Many kinds of traps, can be roughly divided into the float type traps, thermostatic type steam trap, thermodynamic type steam cabinet, inverted bucket trap etc..
     The safety rate, which is in determining the capacity of steampressure reducing valve, safety coefficient of steam using equipment actual condensation water quantity and the markedcapacity error but also to ensure that the steam pressure reducing valve can work normally and estimation. This rate is simply not to be provided from the theory, can not be obtained by calculation is notderived from experience data. Generally speaking, the safety ratethe best way is to ask directly valve manufacturer. If the steampressure reducing valve, the safety rate chosen properly, so that the steam pressure reducing valve capacity of excessive or insufficient, can produce very adverse consequences.
Engineering Chain
Engineering Chain
    Safety factor is too large
   1 of the steam valve capacity increased cost convention.
   2 if the steam valve intermittent movement, capacity over the general assembly so that the valve action cycle lengthened, the average condensation water retention increase, reduce the ability to use steam equipment.
   3 for as float type traps as continuous (proportional) steam trapvalve action, because the valve flap opening is small, large capacitywill make the seat have a galling (high speed fluid through a narrow slit, contact corrosion, and forming a trench), caused by leakage of the valve seat damage.
    4 so that the steam pressure reducing valve life expectancy.
    The safety rate is too small
   1 cannot adapt to load changes of steam using equipment, make the operation efficiency significantly reduced.
   2 by condensation of water pressure reducing valve often reach the highest limit, so that the valve flap and valve seat is easy to produce corrosive injury.
   3 so that the steam pressure reducing valve life expectancy.

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