The ball valve is an inexpensive alternative to other valves. Ball valves use a metal ball with a hole bored through the center, sandwiched between two seats to control flow. We supply the brass material ball valve mostly, and there are 5 main types ball valves, they are One-piece Instrumentation Ball Valve (OIB Series), Hex Bar Stock Ball Valve (HBB Series), High Performance Ball Valve (HPB Series), Trunnion Ball Valves (TB and TBH Series), 3-Piece Ball Valve (PB Series)