The GC series are applicable as gas cooler / condenser holdback valves, but can also be applied as flash tank pressure regulating valves (flash gas bypass). The FGB -60 and -70 are specifically designed to extend the capacity range of the GC family when applied as flash gas bypass valves. All GC and FGB valves have 2500 steps of resolution, feature synthetic seat discs to ensure tight shutoff, and carry the same electronic controller requirements