Swing check valve 52-SC series

for watersewagebronze

AMERICAN has incorporated significant and innovative design changes to help prolong service life for swing check valves in water and sewage service. Traditionally, swing check valves have been manufactured with bronze clapper arm shafts. Under severe service conditions where grit or sand has been present, these bronze shafts have a tendency to wear. AMERICAN Series 52-SC swing check valves incorporate the following design features to help increase service life. Bodies and Bonnets Valve bodies and bonnets are made of gray iron. Generous clearances are provided between the disc circumference and body, as well as the clapper hub and body, which prevent the possibility of binding. Internal contours are specifically designed to provide a smooth flow passage and reduce head loss through the valve. The entire clapper arm and disc assembly are easily removed through the bonnet opening while the valve is installed in the line. Clapper Arms The clapper arms are made of ductile iron. The clapper arm shaft hole and disc stud hole are bushed with bronze for wear and corrosion resistance. Clapper Arm Shafts Clapper arm shafts are made of high tensile strength, corrosion-resistant stainless steel.