Ball Retaining Valves for waste water, suitable for heavy duty aplications. The Special chemical structure of NBR rubber, coating the stainless steel ball, allows the application with liquids of different viscosity and/or chemicaly aggressive liquids having temperatures from 0' to 110'C. The use of rubber costing on all available diameters, improves quality and life of valves reducing water hammer problems assuring noiseless installations.
