application classification is introduced: the general condition of general condition of the valve is designed for most ordinary operation valve, which has low rated pressure, in the American national standards institute ( ANSI） A level 150 to level 600 ( Pipe diameter in DN16 to DN100) Between, medium temperature rating in - 50～650℉（ - 46 ~ 343 degrees Celsius) Corrosive medium and normal pressure drop between the fly but does not cause air pockets and flash. General condition of the valve design has a certain degree of interchangeability and flexibility to make them in the working condition of a wide range of applications. Was prescribed for carbon steel and stainless steel body material. Figure 1. 9 said two illustrations of general condition of the valve, a valve for manual operation, an automatic valve. Special working condition of special working condition of the valve is customized manufacturing valves, it is designed for normal operation and accident of a single application. Due to its peculiar design and manufacture, it can only be run on the certain condition of parameters and operating conditions. This aspect is often used to satisfy the needs of a temperature, height or in a second-round exam of the medium. Figure 1. 10 said a control valve, its design is light type valve and ceramic valve core to deal with the wear of mineral condition including sand particles and high pressure air. Serious condition of the valve working condition of the valve, the serious condition of the valve with special features to handle the volatile substances, high injection pressure drop caused serious cavitation, flashing, congestion or high noise level. This kind of valve can be very good valve core on the cut-off Industrial Valves design. Or special valve plate; Or involved in the rotary valve special ball in order to reduce or prevent the running effect. In addition, operators or process operation requirements set special actuators to overcome the force of the technological process. Figure 1. 11 said a serious condition of the valve, it can handle 1100 ℉ ( 593℃） Liquid calcium, it has a multistage valve core to deal with a high pressure drop, the bonnet with special cooling become warped. Electro-hydraulic actuator can produce 200000 lb ( 889600 n) The thrust. In this paper, the keyword search: valve supply information
Collectively, the effect of double flanged gate valve on industrial society has been to eliminate os gate valve and drastically reduce the time long associated with resilient seal gate valve.
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