Fact Sheet VLT® AQUA Drive deragging feature keeps your wastewater pumps clean Wastewater from households and industry contains particles and fibres that are not removed by the screen filters. The VLT® AQUA Drive deragging feature removes clogs to protect the pump and reduce maintenance. Clogged impellers in wastewater pumps can be a permanent and serious problem. Over time, fibres and particles will build up on the impeller vanes, leading to poor efficiency and extensive wear of the pump. Clogging reduces the capacity of the pump and risks blocking the pump, resulting in downtime for maintenance and ultimately a shorter lifetime expectency. Avoid costly maintenance Manually cleaning the pump is time consuming, as maintenance staff must travel to the site to lift, clean and reinstall the pump; a process that often needs special equipment. With Deragging, Danfoss has added an innovative pump cleaning and protection feature to the VLT® AQUA Drive, which ensures the preservation of the maximum pump capacity by minimizing deposits on the impeller. At the same time the Deragging feature can be optimized for the system by configuring the delay times, the speed and the energy monitoring system. Proactive Deragging With Deragging the pump cleaning can be done proactively. During the commissioning process, it can be specified when the system is to respond: At start and/or stop, at a certain time, via digital input, via serial communications or by using the Smart Logic Controller. For easy programming, all parameters are arranged in one group. The intelligent feature is flexible and can be adapted to the individual requirements of each application. The deragging feature has been developed specifically for the VLT® AQUA Drive. Clogging is a common problem, especially in wastewater pumps. The deragging feature of the VLT® AQUA Drive provides effective protection and maximum uptime. Reduce maintenance costs with regular deragging; a unique feature that increases pump lifetime and efficiency. www.vlt-drives.danfoss.com
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