Application Note: Raising Screens For Cleaning In Wastewater Treatment Plant

Modified 4HW Series electric winches are operated as hoists to raise and lower screens for periodic cleaning at a wastewater treatment plant. The screens filter water during the first stage of purification. A secondary tie-off is used to hold the screen in the raised position. The winches are modified with extended grooved drums for single layer operation, and explosion proof motors and limit switches due to the explosive environment.