First, the key to the installation of pipeline centrifugal pump technology is to determine the installation of the pump height (suction). This height refers to the vertical distance from the water surface of the water source to the center line of the pump impeller. It can not be confused with the allowable vacuum height. The allowable vacuum height indicated on the pump manual or nameplate means the vacuum value on the water inlet section of the water pump, Is measured at 1 standard atmospheric pressure, the water temperature of 20 degrees Celsius, the test and measured. It does not consider the condition of the water flow after the water supply pipe is matched. The pump installation height should be allowed to suck vacuum height deducted after the head of the suction pipe loss, the remaining part of the value, it is necessary to overcome the actual terrain water absorption height. Pump installation height can not exceed the calculated value, otherwise, the pump will not pump water. Second, the size of the impact calculation is the loss of resistance of the suction pipe lift head, therefore, should adopt the shortest pipe layout, and try to install less elbows and other accessories, but also consider the appropriate with some larger diameter pipes to reduce the flow rate within the pipe. Thirdly, it should be pointed out that when the elevation and temperature of pipeline centrifugal pump installation site are different from the test conditions, such as the local elevation of 300 meters or the water temperature of pumping is over 20 degrees Celsius, the calculated value should be amended. Ie atmospheric pressure at different elevations and saturated vapor pressure above 20 degrees Celsius. However, when the water temperature is below 20 degrees Celsius, the saturated steam pressure is negligible. Fourth, from the pipe installation technology, the suction pipe requires strict sealing, can not leak, leakage, otherwise it will undermine the pump inlet vacuum, so that the water pump to reduce the amount of water is not pumping even in serious cases . Therefore, we should conscientiously do the work of the interface of the pipeline to ensure the construction quality of pipeline connection.
LED Light Sources
The LED light source (which is often also called a fibre optic projector or fibre optic illuminator) provides the illumination to any fibre optic lighting system. They contain the lamp or LED and any additional control gear to provide special lighting effects.
LED light sources is broadly split into three categories - RGBW units which are suitable for sensory and decorative lighting systems; white light only which are great for illumination inside display cabinets and for architectural lighting systems. Finally we also offer white light models with traditional effect wheels. These are used in the same way as in older halogen or metal halide light sources and provide easily controllable colour change or twinkle effects.
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