Norgren S/666/83/R Pneumatic Manual Valve 197 L/min G1/8 Roller Operated 3/2 Air Control Valve Product Overview The Norgren S/666/83/R Pneumatic Manual Valve is a reliable air control component designed to support efficient operation in industrial pneumatic systems. Developed by Norgren, a trusted name in automation and fluid control technology, this manual valve provides a practical solution for applications that require dependable mechanical control, smooth air switching,