Many industries encounter problem with residues in the ball valve. Operation is similar to that of a ball valve, which allows for quick shut off. This type of ball valve is known as Cavity Filler Ball Valve. The gearbox in a ball valve timer makes a rumbling sound when actuated. A ball valve uses a spherical ball instead. Another option for cold climates is the "freeze tolerant ball valve". At the bottom of the TDU is a large ball valve. Examples of high recovery valve - butterfly valve, ball valve, plug valve, gate valve etc. The prototype still had one moving part, a ball valve, and was big and clumsy. Daniel Ball Valve and Orbit Valve International were acquired into Cooper Cameron Valves. Another design aspect is the ball valve seat which is critical for performance stability. These non-cylindrical castings include ball valve balls, gear blanks, and conical shaped parts.