Gas Delivery Systems - Gas Manifolds The gas manifolds offered by PurityPlus® combine all of the safety and convenience features of a standard protocol switchover station with the added efficiency of having a reserve cylinder connected to the system. The gas cylinder manifold systems have valving that allows manual switching and isolation of the depleted cylinder for safe change-out. Gas Cylinder Manifold With Automatic Changeover In addition, PurityPlus® has a complete line of automatic and fully automatic changeover manifold systems that act as a continuous gas delivery system for high purity gas services.Several of your compressed gas applications may be best carried out with the use of a gas cylinder manifold with automatic changeover. PurityPlus® offers a large selection of automatic changeover manifold systems. Our gas cylinder manifold systems can automatically change cylinder or bank priority from the primary source to a reserve supply without transmitting pressure fluctuations to the use line. In addition, fully automatic models with electronic touch screens are available to provide simple operation and allows users to choose from any combination of liquid or high pressure supply at the touch of a button.