Cla Val 81662K 7100 Air to Close Inline Control Valve, 1 1 2" FNPT B68416MS The enclosed impeller and precision 73 1 internal gearing The enclosed impeller and precision volute design maximize hydraulic efficiency and flow performance UnitedBuilt Powerhead M3ZRM 4X3 Rope Packing CCW Attribute Details Manufacturer Cla Val Manufacturer Part Number 81662K Model 7100 Valve Type Remote control inline diaphragm valve Operation Air to close Nominal Size 1 1 2 inch Connections 1 1 2 inch Female NPT x 1 1 2 inch Female NPT Body Material Cast iron Cv Factor 25 Approximate Weight 9 lb Applications and other water handling systems that require remotely actuated flow control