KSB unveils variable speed system for wastewater
Integrated Pump Technology
The double-stage Grindex Maxi SH enables customers to better size a pump solution for a specific application.
Grindex Maxi SH reaches new heights in dewatering
KSB Pumps and Valves recently introduced the PumpDrive variable speed system for effective and controlled pumping of wastewater. The variable speed system has been specifically designed to overcome problems experienced when pumping wastewater.
Three functions have been incorporated into the system to allow the most effective operation of pumps in the field. These include establishing a complete water column almost immediately during start-up. This is done through a system that allows the pump to be taken to maximum speed within four seconds and maintained for three minutes, so that an appropriate flow passes through all piping elements before the system starts its controlled, demand-driven operation. This ensures that the discharge line and pump casing are completely primed with the fluid to be handled.
Another feature of the variable speed system is the so-called flushing function. Operators can activate this automatically or manually using a control panel. The PID controller increases the speed up to a maximum value, which triggers the required flushing effect. The current control task is temporarily put on hold for this process.
Flow velocity monitoring is another new feature that is designed to improve operating reliability of pumps in the field. It ensures that the minimum flow velocities specified at the time of selection are met to keep the pipes free from deposits.
If the flow velocity falls below the programmed minimum, PumpDrive can either transmit a fault message to the control station, or start the flushing function to remove any deposits from the piping. u
Integrated Pump Technology has launched the double-stage Grindex Maxi SH, which enables customers to better size a pump solution for a specific application.
Colin Adams, managing director of Integrated Pump Technology, says that importantly this also allows a far more cost effective solution to be achieved.
The Grindex Maxi SH pump, available with a 37kW( 50Hz) motor and equipped with two wear resistant impellers as well as a double diffuser, is ideal for high head dewatering applications, which call for high discharge pressures. The pump is robustly constructed and offers users optimum performance coupled with reliability. The proven impeller hydraulic technology enables a discharge head of up to 140m.
Adams says that by adding a mere 30kg to the already lightweight Grindex Maxi H platform, Grindex engineers were able to produce a pump with an overall weight of only 270kg, which is capable of reaching these high heads without comprising on any of the other characteristics of the wellknown Grindex brand.
The Grindex Maxi SH pumps incorporate the Grindex impeller adjustment sleeve, a familiar sight on the Grindex Matador range. This offers users a simple way to adjust the impeller and suction cover tolerance easily to regain as-new performance after wear. u
KBS Pumps and Valves
Effective pumping of wastewater is possible with PumpDrive variable speed systems.
36 Water Sewage & Effluent January / February 2017