A complete replacement of the sand filter system at Herning Renseanlæg has been carried out, and VATECH 2000 has supplied 120 AVK butterfly valves fitted with pneumatic actuators for the project.
At Herning wastewater treatment plant, 25 years of operation of the sand filters had set they marks, and a complete replacement of the filters was necessary.
Increasing maintenance and decreasing performance were signs that the sand filters needed to be replaced. The valves were no longer closing properly and other parts of the system were worn out. For example, the slots at the bottom of the sand filter did not only pull water but also sand and stones into the system.
Sand filtration is one of the final steps in the water treatment process before the water is discharged into nature. The taxes for discharge depend on the quality of the water purification. New sand filters to improve performance of the treatment process were thus not only better for the environment but also for the economy, and in addition to the heavy requirements for maintenance, which took a lot of man hours, this also gave a financial incentive to replace the filters.
AVK valves delivered to the project
AVK butterfly valves fitted with double-acting pneumatic actuator:
24 pcs. DN150
96 pcs. DN400
The valves were supplied by VATECH 2000.Product details