Procurement of Ladish Sea Valves in support of the USNS MEDGAR EVERS (T-AKE 13). This an exclusive licensing agreement with one responsible source. Ladish Valve Inc. is the Original Equipment Manufact... Procurement of Ladish Sea Valves in support of the USNS MEDGAR EVERS (T-AKE 13). This an exclusive licensing agreement with one responsible source. Ladish Valve Inc. is the Original Equipment Manufacturer (OEM) and owns the property rights to the drawings of the valves. The items are only available from Ladish Valve Inc. and their authorized distributors.