BLOG July 2, 2014 SMC Modular F.R.L.Units New Modular Style F.R.L. Combination- AC-A Series Improved flow performance Better visibility and safety from Double Layered Polycarbonate bow Standard back flow function to release residual air pressure Easy maintenance and installation Better Enviornmental Resistance SMC Pneumatics Modular F.R.L. Units SMC Pneumatics Technical Datasheets