Two new valves have been introduced to the power industry. The nozzle check valves eliminate water hammer and reverse flow when a quick acting, self-damping valve is required. Smooth contoured flow passages provide low-pressure drop and stability at all flow rates. The nozzle valve line includes sizes from 2 inches to 48 inches in American National Standards Institute classes 150 to 2,500. The ball screw stems, an option for parallel slide gate valves, improve actuator efficiency. By using ball bearings to improve the efficiency of the valve stem threads, less torque and energy are required to open and close the valve. This allows use of lighter weight, more effective actuators saving weight and cost. All valves meet the requirements of the American Society of Mechanical Engineers.
Atwood & Morrill Company Inc.