? Posted: small European online QQ:? 1922601218 Mobile:? 159-7414-3465 nationwide toll-free hotline: 400-086-8955 box no negative pressure water equipment Products Box negative pressure water equipment is transferred to AC inverter speed technology and computer control technology being applied to the pump automatic control equipment, and combined with the water pump unit mechatronic devices. Negative pressure water equipment box core equipment AC variable frequency control cabinet combines advanced computer control frequency conversion technology, advanced computer control technology and advanced PID regulator computer programmable controllers on the current international advanced technology. On the basis of water supply network in the instantaneous changes in pressure and flow parameters, automatically change the number of units and run the pump speed to achieve constant pressure variable water supply loop regulation, so as to improve the company's quality and efficient energy-saving purposes. The basic principle of the box no negative pressure water equipment principle box no negative pressure water equipment are adjusted automatically run the pump station number and a water pump speed changes according to the user, so that the pump outlet pressure remains constant. When a user less than a water pump out the water, the system according to changes in water has a variable speed pump is running, when the water increases the pressure drop in the pipe system, when the pressure sensor to detect the signal transmitted to the computer control unit , run by computer to determine, issue commands to the inverter to control the pump motor, the speed is accelerated to ensure that the system pressure constant, whereas when the water was reduced, so that the pump speed slows down to maintain constant pressure. When the water is greater than a water pump, the first pump is switched to frequency operation, the second pump start frequency control operation, when the water is less than two pumps out water, can automatically stop one or two pumps run. Throughout the operation, and always maintain the same constant pressure system, the pump is always working in the university area, both to ensure constant water supply users, but also saves energy. Equipped with full equipment without operator. Box no negative pressure water equipment Features a significant economic benefits: using the device, without the construction of towers, no roof water tanks, reducing the construction cycle works, but also solve the high cost of the shortcomings of the project cost, but also to overcome the pressure fluctuations, the pump starts and frequent deficiencies. 2, rigorous design: The device uses constant pressure pump control, no matter how the water changes in the system are to make the pipe outlet pressure remains constant. 3, reliable operation: The device uses variable speed drives and high-quality domestic water pump, with perfect protection and automatic, manual conversion, the operation is very reliable. And good performance, flexible control, anti-interference ability 4. Efficiency: The device can be adjusted according to changes in the user water pump speed, the pump is always working in the high zone, energy-saving effect is obvious, than the constant speed pump section 35% of electricity. 5, simple operation: The device uses automatic control, PID regulation, keyboard, man-machine interface (text, numbers) display. The operator simply convert cabinet switch, users can achieve the required conditions, to achieve automatic unattended. 6, the protection function: a perfect overload, short circuit, overvoltage, undervoltage, phase, overcurrent, short circuit, water shortage and other automatic protection. In exceptional circumstances can signal alarm, self-test and fault diagnosis. 7, small footprint, easy installation: Only one set of complete equipment supply control cabinets and pump unit, installation is very simple and convenient. 8, to extend the life of pumps and motors: for more than one pump can achieve reliable soft-start, make the grid and pipeline avoid impact, and take turns running, greatly extending the life of pumps and motors. ? Posted: small European online QQ:?? 1922601218 Mobile: 15974143465 National free hotline: 400-086-8955