Introduction no negative pressure water equipment 

 Water is the source of human life, human existence not get water. 
 With China's urbanization level of the continuous improvement of the urban population increased dramatically, the continuous expansion of urban residential buildings and the transformation of the residential floors constantly heightening the urban area is expanding, the original pressure at the municipal pipe network was inadequate, most commonly the existence of the peak water level is too low water pressure, a high level, the user water difficult. Therefore, additional secondary pressure most of the construction equipment, construction of reservoirs and high water tank, can have secondary pressure pump water, but the existence of the traditional secondary pressure equipment investment, water vulnerable to many of the shortcomings of secondary pollution. 
 I developed the production of WB-type non-negative pressure water equipment can be connected in the urban political control to the user a second line of a pressurized water supply equipment does not require the construction of reservoirs, the high water tank, directly in series in the municipal management line, normal operation of the municipal pipe network does not form negative pressure (suction), in full compliance with China's "Urban Water Supply Ordinance" requirements, can take advantage of the existing pressure on the municipal pipe network, using frequency control water saving is extremely significant way . By the parties to the market after the big users of all ages. 


 Characteristics of non-negative pressure water equipment 

 1, no need to set the reservoir and the high water tank 
 No negative pressure water equipment, the municipal pipe network directly in series without the construction of reservoirs and the high water tank, saving investment and reduce the floor area occupied. 
 When sufficient municipal water supply pipe network, the non-steady flow of negative pressure smaller tank, the entire device area is small, installation of water pipes can be simply turned out, very convenient. 
 2, no secondary pollution of water sources 
 Cans and non-steady flow of negative pressure pipe were sealed package of equipment, from the municipal pipe network until the user taps are not subject to air pollution, debris and dirt in the secondary, non-steady flow of negative pressure tank through the Origin stream part of the food container interior coatings are used preservative treatment, without negative pressure water equipment coatings and machine are in line with the relevant food hygiene standards. 
 3, the energy saving effect is remarkable 
 The traditional use of secondary water supply reservoir pressure and high water tank, put pressure on municipal water supply reservoir pipe network wiped out when the energy and energy waste. 
 Steady flow with no negative pressure tank, the municipal pipe network water pressure to pump directly superimposed on the import, the pump just to add a low pressure part of the municipal pipe network, the whole energy-saving effect is remarkable. 
 4, no need to set the regulator pressure pumps and large volume tank 
 General water supply equipment in order to ensure a small flow of water users evening or zero leakage flow into the pipeline to avoid frequent starting to pump, smaller flow regulators are equipped with large capacity pumps and pressure tank, both one-time increase of investment in water supply equipment also increased the operating costs of equipment (night operation of the pump power consumption voltage regulator). 
 Night and other low water peak, the municipal water supply pipe network pressure and water supply can meet the basic requirements of users, the use of WB-type non-negative pressure water equipment, the original pressure of the municipal pipe network is fully utilized, municipal pipe network direct supply of water users, WB-type equipment without negative pressure water equipment without voltage regulator pressure pumps and large capacity tanks, investment savings, and significantly improve the WB-based non-negative pressure water equipment in operation in energy saving. 

 TOP 
 Work environment without negative pressure water equipment 

 1, the power supply voltage fluctuation ≤ ± 10%; 
 2, ambient temperature: -10 ℃ - +40 ℃ (no freezing); 
 3, air relative humidity: 20% -90% (no condensation); 
 4, the absolute altitude: ≤ 1000m; 
 5, no conductive dust and can corrode metal and undermine the place of the gas insulation; 
 6, no possibility of explosion; 
 7, shock: <5.9m/s2 (0.6G), obliquity: ≤ 5 degrees of the place; 
 8, there is rain water vapor shock equipment and place; 

 Principle of non-negative pressure water equipment 

 WB-type non-negative pressure water equipment normally in use, the municipal pipe network steady flow of water into the non-negative pressure tank, the tank a lot of air discharged from the exhaust valve. When the air drained, the valve float is float addition to water, plug the drive head to the closed position, and slowly close the exhaust port, stop the exhaust, to prevent the water, when the steady flow of the normal supply from the tank water, if a small amount of air gathered in the valve to a considerable extent, the water level dropped valve, float fall, this time the air discharged from the vent. 
 No negative pressure water equipment during normal operation, when the municipal water supply pipe network is low, air flow within the municipal water pipe, or the steady flow pressure below atmospheric pressure inside the tank when the tank water level steady flow, float along fall driving plugs open, inhaling air, so the tank to maintain the steady flow of atmospheric pressure, not to generate negative pressure on the municipal pipe network. 
 When the pressure is lower than the municipal pipe network users need to set pressure, the pump frequency control operation, to ensure that users of water pipe network pressure to meet user requirements. Municipal pipe network water pressure higher. The lower the speed of the pump, the lower the municipal pipe network water pressure, the pump speed is higher. When the municipal pipe network water pressure to the user requirements, WB-type non-negative pressure water equipment automatically stops working, municipal water pipe network directly through the bypass pipe supply users. 
 When the municipal pipe network without water, the steady flow of tank water level gradually decreased, when the minimum level, the steady flow level gauge on the tank issued a stop signal, WB-type non-negative pressure water equipment automatically stops at a water protection signal. 
 When the power blackout, WB-type non-negative pressure water equipment downtime, municipal water pipe network directly from the WB-based non-negative pressure water equipment supply bypass pipe to the user.