Constant pressure water supply controller Walter Water Equipment Co., secondary water supply equipment solutions expert! Hotline: 0731-82244977 17708450630 smiled Sales Address: Changsha High-tech Development Zone, Lu Tin Road on the 8th floor, Oak Park 5 a dealer basic conditions: 1. highly recognized Walter company's development philosophy, willing to work with us to create great cause together . 2. love to drainage, water supply industry sales career, have a good working attitude. 3. There is a good social relationship or have their own marketing team, with good development potential market credibility 4. good operating conditions stable company priority. 5. voluntarily accept and comply with the company, "agency agreement" by the provisions. 6. With rich resources given priority. Pressure water supply controller refers to the pump frequency controller for constant supply of specialty. Constant pressure water supply system controller provides stable and reliable operation, to achieve a real sense of unattended automated reverse circulation pump, variable frequency operation to ensure the smooth and stable operation of each pump start optimal operating efficiency and equipment, eliminating start large current impact, reducing the average speed of the pump, and thus extend the life of the pump can eliminate startup and shutdown of the water hammer effect. The main function of a constant pressure water supply controller to maintain constant pressure; 2, the control system can be manual / automatic operation; 3, multi-pump automatically switches to run; 4, system sleep and wake up when the external water stops, the system is in sleep mode , automatic wake up when demand for water; 5, online tuning PID parameters; 6, pump and line protection detection alarm, signal display. Pressure water supply controller usage usually in the same way water supply system, set up more than one common pump, several large water pump full of water supply to open one or two hours. When using frequency control for constant pressure water supply, use two ways, one is all pumps fitted with a single controller; Second, each pump is equipped with a single controller. The latter method based on feedback from the pressure signal, automatically adjust the output frequency through the PID operation, change the motor speed, and ultimately achieve the purpose of the pipe network constant pressure on a closed loop, is relatively simple, but the high cost. The former method is low cost, poor performance than the latter, but more complex control procedures, is the future direction of development. General water supply system, due to water supply and reliability requirements, the use of multiple pumps are running in parallel mode. Which would also help when the water supply varied over a wide range by adjusting the number of units to achieve economic operation of the pump, but only to adjust the number of units, can not guarantee constant pressure water supply, and its operating efficiency is not high. Pump speed control using flow best running economy. But for larger capacity water supply systems, the use of the full capacity of the speed regulator, large investment, nor necessary. So for multiple pumps water supply system, with a single speed pump can achieve full capacity range of constant pressure water supply, as long as the other fixed speed pumps running. Namely by adjusting the number of units and speed control together to ensure constant pressure water supply amount within the range of variation. Speed ??pump system for general use inverter drives. In addition to the drive by adjusting the pump speed to achieve constant pressure water supply, but also can be used to control other pumps soft start by switching equipment. Application mode and system components in the field of industrial control field, programmable logic controller (PLC) has played an important role. As the state investment in the water sector increased water run continuously improve the level of automation, PLC in the water industry application gradually increasing. Supporting the use of the touch screen and PLC, PLC makes the application more flexible, and can set parameters, display data, such as the situation depicted in the animation process automation, makes the application of PLC visualization. Constant pressure water supply become a mainstream industry, is an important means to ensure the water supply network in constant states. Modern inverter perfect network communications capabilities for synchronous operation of the motor, remote centralized control and online monitoring provides the necessary support. Through the touch screen connected to the PLC, you can make more image control, intuitive operation more simple and convenient. Composite Application PLC, touch screen and inverter, the inverter control communication to achieve constant pressure water supply. Pressure water supply controller system composed of a constant pressure water supply controller and system components constant pressure water supply system is usually caused by water, pump (main pump + dormant pump), pressure sensors, PID controller, inverter (main pump + Sleep pump), pipe network components. Workflow is the use of set pressure changes in the pipe-line pressure sensor network system will change internal water pipe caused promptly signal (4-20mA or 0-10V) feedback PID controller, PID regulator contrast setting control pressure after the operation given the appropriate frequency command to change the pump's running or speed, making the hydraulic control pressure pipe network is consistent. 2, constant pressure water supply controller parameter selection (1) reasonable selection pressure control parameters to achieve low power consumption constant pressure water supply system. Key to achieving this goal lies in the pressure control selection parameter, usually pipe network pressure to select control points are two: one is the most negative point of the pipe network constant pressure control, and the other is the pump outlet pressure constant control. Select the network the most negative point of minimum head pressure control parameters, to form a closed-loop pressure-controlled system, making the pump speed and the PID regulator set pressure to match, you can achieve maximum energy savings, but also to achieve a constant pressure water supply purposes. (2) The drive commissioning put into operation is a necessary means to ensure optimal system operating state. Drive according to the moment of inertia of the load size, the time required to start and stop the motor is not the same, the set time is too short can cause the drive when accelerating overcurrent, overvoltage protection during deceleration; the set time is too long will cause the drive to regulate the system becomes slow, delayed reaction, poor adaptability, the system is easy in the short-term instability in the speed runs. In order to protect the inverter does not trip, field use among many of the inverter deceleration time is set too long, it brings the problem can easily be concealed equipment and appearance of normal, but the drive is less than optimal operating condition. So the scene when used according to the different nature of the load being driven, test out the minimum allowable load acceleration and deceleration time can be set. The choice of pump motor, acceleration and deceleration time is between 0.2 to 20 seconds. Pressure water supply controller works with constant pressure water supply controller to achieve constant pressure water supply, and with regulating valve to achieve constant pressure water supply compared to energy-saving effect is very significant (can be calculated depending on the circumstances). Its advantages are: 1, the starting balance, starting current limit within the rated current, thus avoiding the impact on the grid at the start; 2, the average pump speed is reduced, thereby prolonging the life of pumps and valves; 3 can eliminate water hammer effect starting and stopping; Generally speaking, when by a frequency control a motor, just so that you can match with the drive motor capacity and the actual motor capacity. When an inverter simultaneously control two motors, in principle, with the drive motor capacity should be equal to the sum of the two motor capacity. However, if at the time of peak load water supply quantity than two pumps at full speed a lot of difference, may consider appropriate to reduce the capacity of the inverter, it should be noted that there is sufficient capacity. While the pump is running at low speed, the motor current is small. However, when the user's frequent water changes, the motor will be in frequent acceleration and deceleration state, acceleration and deceleration of the current can be slightly more than the rated current of the motor, causing the motor to overheat. Therefore, the motor thermal protection is required. This temperature rise due to frequent acceleration and deceleration and accumulated, electronic thermal protection function within the inverter is difficult to play a protective role, it should be used for the motor thermal relay thermal protection. In the main function of the preset, the highest frequency should be rated for a maximum operating frequency of the motor frequency inverter. L, deceleration time in the case of the PID regulator, the acceleration and deceleration time should be set shorter, so as not to affect the dynamic response of the decision by the PID regulator. Such as the drive itself has PID adjustment function, simply set the preset PID function is active, the set-up and spin-down time will automatically lapse. Features a constant pressure water supply controller, saving: The most significant advantage of constant pressure water supply controller is to save energy, usually in the 10-40% energy savings. From the perspective of saving a single pump, the smaller the flow, the greater the savings. Optimization of energy-saving control software that allows pump to achieve maximum energy saving operation; 2, health-saving: set according to the actual use of water pipe network pressure, automatic pump out the water, reducing water run, drain phenomenon; the implementation of closed-loop water system After all the water users directly supplied by pipeline, the abolition of the water tower, the day the pool surface, pressure tank and other facilities, to avoid the water, "secondary pollution", the abolition of the pool cleaned regularly work. 3, reliable operation: constant pressure water supply system water pressure controller implements a stable and continuous flow can vary within a wide range, so that the user can ensure that the water pressure at any time, and does not appear in the case of peak water heater not working by frequency converter soft start pump, the pump power frequency inverter switching to no impact to prevent the pipe network impact, avoid pipeline pressure gauge, pipe rupture. 4, flexible control: segmentation water, regular water supply, manually select the work. 5, self-protection function: the new cell constant pressure water supply system with overcurrent, overvoltage, undervoltage, phase loss, short circuit protection, instantaneous power failure protection, overload protection, stall