Belimo says its butterfly valve range has been expanded to include competitively priced assemblies for applications that require 50 psi close-off pressure. These assemblies are identified by the last digit “U” in the valve body nomenclature. Three-inch to 6-in sizes feature HDU bodies for 2-way and 3-way configurations motorized with non-spring return standard actuator series GR, GM, and DR. Eight-inch and 10-inch sizes feature LU bodies for 2-way configurations motorized with non-spring return PR series actuators. The company claims the HDU and LU disc design ensures positive valve sealing while maintaining low-seating torque. The cartridge style seat incorporates an elastomer bonded to a phenolic stabilizing ring, eliminating elastomer movement, and reducing seat tearing or fatiguing due to bunching.