Dresser Consolidated”s Series 3500 electromatic ball valve is designed to provide automatic or manual overpressure protection for steam boiler systems. It can also be used to assist startup and shutdown venting. Inlet sizes are 1.5 inches, two inches, and 2.5 inches, and they are rated ASME Class 1500 though 4500. Outlet sizes are three inches and four inches, and they are rated ASME Class 300 through 900. Bore sizes range from .875 through 2.000. Reduced bores are an option. The valve supports a max. temperature of 1,100 F. Materials of construction are alloy steel body with a titanium alloy seat and ball. The valve is certified ASME B & PVC Section I.