Specifications include, but are not limited to: Liquid nitrogen supply line system This system is for a vacuum jacketed supply line system from, and including, a three way manifold on the outside of the building, to and including a vacuum insulated distribution manifold (less solenoid valves) and flexible supply lines to the vacuum chamber inlet. This will also include vacuum insulated and uninsulated vent lines from the chamber exit to the vent manifold and safety tank. Detailed description: The piping system supplied will consist of a number of flexible hoses, both vacuum insulated and uninsulated, in a variety of sizes, a vacuum insulated supply header, a vacuum jacketed rigid pipe system to transport liquid nitrogen from the outside manifold to the supply header and an automatic tank switching manifold outside the building. This system is to also include all appropriate safety features for a liquid nitrogen system such as this. Detailed descriptions of the primary components are listed below: • Outside tank manifold: There will be a manifold mounted outside the building that has three inputs. Two inputs will be automatically switching between two liquid dewers to prevent the system from drawing from an empty tank. This system should have all the appropriate control devices and sensors required. Customer supplied 80 psi shop air and 120V electrical service are available. A third, manual input line connection for connection to a bulk tanker trailer. An insulated flexible line should be provided with an approximate length of 15 feet, with appropriate connections on each end for the manifold and bulk tanker. The line should be removable for storage when not in use. • Emergency shut-off: The system should include an emergency shut-off valve that can be remotely operated and should automatically close in the event of a power failure. This valve can be either electrically or air operated but remote operation should be functional with a 24VDC control line. This shutoff should also have an emergency off button located at or near the inlet manifold to manually actuate the shutoff valve. • Rigid Supply line: .56” ID vacuum insulated stainless steel tube supply line to be run between the outside manifold and the supply manifold. This line to be approximately 100 feet in total length. This line to include all appropriate elbows, flexible joints and mounting hardware. This line to include a “keep full” device at two locations, the highest point above the inlet manifold and the highest point above the tank manifold. The keep full device at the inlet manifold end should vent through a ¾” flexible line to the customer supplied exhaust manifold, approximate line length of 10 feet. Keep full device on the tank manifold end should vent to outside the building. Line location and path to be approved by customer prior to installation. • Inlet manifold: This manifold should be a stainless steel vacuum insulated manifold for cryogenic liquid nitrogen that includes the following features: 1. Top inlet fed by the rigid pipe system