With the ever growing need to conserve resources and cut production costs every aspect of the production process must be considered, even that which may be taken for granted such as gas supplies for glove or dry boxes. Pyramid Engineering Services has developed a series of recirculation nitrogen gas driers and de-oxygenators. The RDG recirculation drier has been designed to complement the glove box enclosures and storage units that we produce. The primary aim is to reduce the overall running cost of these enclosures by dramatically reducing the consumption nitrogen gas (Argon, Air or Helium mixed).