Accessory Valves & Devices Timing Volumes Anodized aluminum, bore sizes 1 1/2" thru 6" with a 200 psi maximum pressure. Rexroth offers a wide range of timing volumes for a variety of pneumatic system uses. These volumes are rated at 200 psi max. working pressure with a 5 to 1 safety factor and are suitable for marine applications. They are constructed of light weight corrosion resistant anodized aluminum ends and tubing. Two ports and threaded mounting holes are provided. Use approximately 2/3 of volume for oil reservoirs to allow for interface. Anodized aluminum, bore sizes 1 1/2" thru 6" 200 psi maximum pressure Download Timing Volume section of SC-400 (PDF-117KB)