Dynamic flow control characteristics of pneumatic valve

, power saving,
in the hot water heating, circulating water pump working point, namely the G - circulating pump H characteristic curve and the network characteristic curve intersection, only in this flow, the water pump to produce pressure equals the pressure network needs, the working point of the pump can run in the most efficient optimal condition. Because the system of hydraulic imbalance, many flow rate are in a big operation mode, the working point of the pump is not often run under the condition of economic work. Due to traffic and the relationship of the third power of the pump shaft power into, so big flow operation mode means that increases power consumption, such as general thousands of square meters of construction area of heating system, electric power of circulating water pump in - KW, if system of circulating water. Times, the electrical water pump are improved. Times, da KW。 After using this product, because the system of hydraulic misadjustment basically solved,
the actual network characteristic curve of point B moving to calculate network characteristic curve of A point ( The figure below) , in the most efficient pump operation, shaft power consumption of the smallest best. According to the actual test, power saving - after use of the pneumatic valve % meter - 。 千瓦。 H / ㎡. Value - 。 Yuan / ㎡ years ( Electricity prices in yuan/KWh) 。
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section coal heating system, the water flow is the design discharge - near end users Times, the remote user traffic is design flow. - 。 Times, almost hot cold phenomenon is widespread.
in order to improve the end user at room temperature, some of the heat supply system adopted the method that increases circulation flow, the flow of restricted conditions, improve the water supply system will be used on temperature and the amount of heat source heating method.
this operation mode is to increase power consumption by heat loss to eliminate the thermal condition of disorders conceal the existence of hydraulic misadjustment, if using the pneumatic valve, can fundamentally solve the problem of hydraulic imbalance, the flow of each user can according to the design flow rate distribution, the proximal and distal + ℃ for all users at room temperature can meet the design standards.
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- water saving ℃ hot water heating system, control indicator of circulating flow L / ㎡ h, make-up water rate under %. Actual situation due to a serious water loss of heat supply network, make-up water rate in - % is generally, some boiler make-up water rate is high %, cause the original set of ion exchanger water yield can't meet the requirements on the water. The main reason for the severe water loss, which is due to the end user can not meet the requirements to take hot water at room temperature. According to the survey up to - the cost of the make-up water alone 。 Yuan / ㎡. After the installation of this product, due to the working condition of hydraulic and thermodynamic stability, make-up water rate is greatly reduced, generally by the original % % to the left and right sides, water - on average L / ㎡.
flow control pneumatic valve pneumatic valve pneumatic valve or balanced compared with manual adjustment for pneumatic valve pneumatic valve installation manual adjustment or balanced adjustment of the system, when the adjustment of a particular user, the flow of other users changed also. If you want to dispatch working condition of the whole pipe network hydraulic balance, need to repeatedly adjust the pneumatic valve. For flow controller, only one can adjust the working condition of the whole pipe network hydraulic balance, meet the needs of users design flow.
flow controller is the biggest characteristic of the performance parameters of the flow controller: when self-reliance type flow control pneumatic valve import and export of differential pressure changes, through self-reliance type flow control pneumatic valve flow is constant.