Sharpe Valves 17 Series Ductile Iron Butterfly Valve, Lug Style, Stainless Steel 316 Disc, Buna-N Seat, Gear Operator, 3" Lug-style design for end-of-line service and removal of downstream piping Made of ductile iron for compressive strength and more flexible and elastic than cast iron; Buna-N seats provide high tensile strength and resistant to oil, fuel, and other chemicals Gear operator with a handwheel for manual flow control Maximum steam pressure of 200 pounds per square inch (psi); Working temperature range of 10 to 180 degrees Fahrenheit. Flanged connections surround the body on both sides for bolting to pipes