LEO BWS PID control Non-negative pressure booster system

A reliable solution for various applications.

Product Overview The pressure value on the pump outlet is set as a parameter in the water supply equipment. The output frequency is controlled by PID inverter and the rotating speed of pump motor is consequently adjusted to keep the water system pressure constant as the preset pressure value. When the water consumption increases, the frequency is increased accordingly to accelerate pump speed. On the contrary, when the water consumption reduces, the frequency is decreased to reduce the pump speed. In this way, a sufficient pressure (same as the preset value) and water supply (which fluctuates according to the water consumption of the users) in the entire network is guaranteed. Product Features This device features stable pressure, non-frequent operation, high efficiency, energy saving and low noise, which can be used to replace traditional high-positioned water tanks or water towers. * 24 hours constant pressure and automatic activation of auxiliary pumps according to pressure signals * Smooth start, which eliminates water hammer and extends the service life of motors and pumps * Protection against under or over voltage, overcurrent, overheat, overpressure as well as no-load of water * Optional functions available on customer’s demand, such as motors in-turn running, sleep mode, etc. * Digital PID control, which is better than PLC logical control * Stable operation and easy handling due to high automation and intelligence level * 100% factory tested with very low failure rate Applications * Communities, villas, office buildings, high buildings, hotels, restaurants, etc. * Boilers (cold and hot water) * Pressure boosting in water plant * Industrial production * Cooling water circulation system * Fire fighting Operating Conditions * Power: 380 V, 50 Hz (60 Hz on request) * Ambient temperature: 0 - 40°C, relative humidity up to 90%, no condensation * Medium: Clean water or other liquids similar to water in physical and chemical properties * PH value: 5 - 9 * Liquid temperature: 0 - 70°C * Altitude: up to 1000 m, slope of the base up to 5 degree Product Functions: - Constant pressure water supply The pressure of pipe network is controlled within a certain range. - Alternative operation The pumps work by turns according to the present timing. The operation time for each pump is roughly equal to prolong the service life of the device. - Timing function Working pressure values in different time can be set to meet the demand of water supply. - Sleep mode The device goes into sleep mode for energy-saving during the night or the water consumption is very few. - Automatic wake-up When the pressure of water network reduces to the preset value, the device will be waken up automatically and start to operate. - Automatic reset In the event of an inverter failure, the controller will reset the inverter automatically. If the reset time is more than preset number, a display of inverter failure will be generated by the system. Maintenance of the inverter is necessary. - Automatic operation at power frequency In the event of malfunction of the inverter or pressure sensor, the device will operate at power frequency automatically to ensure water supply and sound an alarm. - Manual/Automatic operation The device has two operation modes (manual and automatic) for selection. - Automatic start/stop In case of low water level in the water source, the device will stop the working pumps and sound alarm. When the water level recovers, the device will restart automatically. - Overload protection When the current of the motor exceeds the preset value for a specified period of time, the controller will shut down the related pump and sound an alarm. - Water-load protection If the device has no water or high gas content for a specified period of time, the controller will shut down the entire device. The device runs automatically again, when the water is recovered and the gas inside is exhausted. - Overpressure protection When the pressure is higher than preset value for some reason during operation, the device will be shut down automatically to avoid any damage of pipelines. - Low pressure protection When the pressure of the pipelines is lower than preset value, the device will judge it as a leakage on the pipe network and will be shut down automatically to save the water. - Alarm function Any fault during operation will be alarmed and displayed on the LCD screen automatically. - Information storage All alarm information can be saved in the controller for inspection. - Password Setting The device is protected by a password. Only the administrator is authorized to change the parameter. - Reset of parameter values In case of abnormal operation due to change of parameter values by users, the values can be reset to the factory default settings for safe operation. - Overvoltage & Undervoltage protection If the voltage is 10% higher or lower than normal voltage, the device will stop working to avoid any damage of the components. - Phase sequence and phase-lacking protection In case of wrong phase sequence or lack of phase at power supply, the inner control components will protect the device and ensure it's normal operation. - Remote monitoring The device can be equipped with a remote monitoring system.

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Q1. Are you a manufacturer or a trading company? A1: We are the biggest pump manufacture in China. Q2. Where is LEO factory? A2: No.1, 3rd Street, East Industry Center, Wenling, Zhejiang, 317511, P.R.China Q3. What about the payment? A3: T/T: 30% before shipment, the rest paid against B/L copyL/C: L/C at sight, L/C 30 days, L/C 60days. Q4. What about delivery time? A4: 35 days after the receipt of the payment. Q5. About shipment?