I want to buy a set of non-negative pressure frequency conversion water supply equipment, please ask where the good!

Select the Shanghai Panda, the highest cost-effective, strength, product quality, service are first-class, Qingdao Sanli good is good, but the price is "non-spectacular", completely speculative, and some of the features of the equipment is not as good as the Panda, for example, the ability to adjust the peak, as long as the inlet valve off the main, Sanli equipment immediately shut down, the Panda's can adhere to 3-5 minutes. Minutes, that Sanli's non-negative pressure tank is just a pose color, the actual role and significance is not very much, the whole device is only partial to the appearance of the blind pursuit of the thickness of the material, increasing unnecessary waste, and basically rely on assembly, resulting in cost control is not ideal, these are the main reason for its higher prices, Panda's AAB axis-cooled high-efficiency pumps are very distinctive, low-noise, low-energy, long life, because of temperature rise Low copper consumption is low, the motor and pump shaft concentric, the use of four-stage motor, equipment, advanced production process (advanced hydraulic model, precision casting, electrophoresis treatment) and other aspects of the factors determine its unique advantages, thus laying down its brand in China's water supply and drainage equipment, but the price is not much of an advantage relative to other manufacturers.