OMB Valves OMB The world-renowned valve manufacturer with its roots in Italy.Almost every AML (approved manufacturers list) will mention OMB for at least 1 or more product categories.We can supply forged gate valves, forged globe valve, forged check valve, 2 piece ball valves, 3 piece ball valves, top entry ball valves, cryogenic valves, bellow sealed valve, extended body valve