Ball ValvesIt is a valve with a spherical disc (or ball) to control the flow through it. The ball (sphere) has an orifice (called a port) where the flow occurs when it is "in line" or "open". When the valve is closed, the orifice is perpendicular to the end of the valve, thus stopping the flow.
Ball valves are usually operated by levers, gears or actuators. They are part of a quarter-turn series, which means that the opening mechanism needs to be rotated a quarter (or 90 degrees) to open or close.Valves.
They are an excellent choice for shutdown applications; however, they do not typically provide the fine control required for throttling applications.
Ball valves are available in five common body styles: single body, three piece, split body, top inlet and welded valve. The distinction is based on the way the various parts of the valve (especially the housing containing the ball itself) are manufactured and assembled. The valve operation is the same in each case.
In addition, there are different styles related to ball mechanism holes.
Full orifice or more commonly full bore ball valves have oversized balls, so the hole in the ball is the same size as the pipe, resulting in lower frictional losses. The flow rate is not limited, but the valve is larger and more expensive, so it is only used where free flow is required, such as in pipelines that need to be cleaned (the method used to clean the pipe).
In a reduced port or, more commonly, a reduced orifice ball valve, the flow through the valve is greater than the valve'sPipelineThe size is one pipe size smaller, which results in a flow area smaller than that pipe. Since the flow discharge remains constant and is equal to the flow area (A) multiplied by the velocity (V), the velocity increases as the flow area decreases when A1V1 = A2V2.
V-port ball valves have a "v" shaped ball or "v" shaped seat. This allows the orifice to open and close in a more controlled manner closer to the linear flow characteristics. When the valve is in the closed position and begins to open, the small end of the "v" opens first, allowing for steady flow control during this phase. Due to the higher velocity of the fluid, this type of design usually requires a more robust construction, which can damage standard valves.
Trunnion ball valves with additional mechanical anchoring at the top and bottom of the ball are suitable for larger and higher pressure valves (e.g., over 10 cm and 40 bar).
Chamber-filled ball valves. Many industries are experiencing problems with ball valve residues. Residues in liquids intended for human consumption can also be a health hazard, and as liquids change from time to time, contamination of one liquid by another can occur. The residue is generated because in the half-open position of the ball valve, a gap is formed between the ball hole and the valve body, in which the fluid can be trapped. To prevent fluid from entering the cavity, the cavity must be plugged, which can be done by extending the seat in such a way that it is always in contact with the ball. This type of ball valve is called a cavity packing ball valve.
Ball valves are also available in 3-way or 4-way designs. These designs are usually L or T shaped with a hole in the middle. These valves are used for transferring flow to multiple ports simultaneously.
Ball ValvesIt is a valve with a spherical disc (or ball) to control the flow through it. The ball (sphere) has an orifice (called a port) where the flow occurs when it is "in line" or "open". When the valve is closed, the orifice is perpendicular to the end of the valve, thus stopping the flow.
Ball valves are usually operated by levers, gears or actuators. They are part of a quarter-turn series, which means that the opening mechanism needs to be rotated a quarter (or 90 degrees) to open or close.Valves.
They are an excellent choice for shutdown applications; however, they do not typically provide the fine control required for throttling applications.
Ball valves are available in five common body styles: single body, three piece, split body, top inlet and welded valve. The distinction is based on the way the various parts of the valve (especially the housing containing the ball itself) are manufactured and assembled. The valve operation is the same in each case.
In addition, there are different styles related to ball mechanism holes.
Full orifice or more commonly full bore ball valves have oversized balls, so the hole in the ball is the same size as the pipe, resulting in lower frictional losses. The flow rate is not limited, but the valve is larger and more expensive, so it is only used where free flow is required, such as in pipelines that need to be cleaned (the method used to clean the pipe).
In a reduced port or, more commonly, a reduced orifice ball valve, the flow through the valve is greater than the valve'sPipelineThe size is one pipe size smaller, which results in a flow area smaller than that pipe. Since the flow discharge remains constant and is equal to the flow area (A) multiplied by the velocity (V), the velocity increases as the flow area decreases when A1V1 = A2V2.
V-port ball valves have a "v" shaped ball or "v" shaped seat. This allows the orifice to open and close in a more controlled manner closer to the linear flow characteristics. When the valve is in the closed position and begins to open, the small end of the "v" opens first, allowing for steady flow control during this phase. Due to the higher velocity of the fluid, this type of design usually requires a more robust construction, which can damage standard valves.
Trunnion ball valves with additional mechanical anchoring at the top and bottom of the ball are suitable for larger and higher pressure valves (e.g., over 10 cm and 40 bar).
Chamber-filled ball valves. Many industries are experiencing problems with ball valve residues. Residues in liquids intended for human consumption can also be a health hazard, and as liquids change from time to time, contamination of one liquid by another can occur. The residue is generated because in the half-open position of the ball valve, a gap is formed between the ball hole and the valve body, in which the fluid can be trapped. To prevent fluid from entering the cavity, the cavity must be plugged, which can be done by extending the seat in such a way that it is always in contact with the ball. This type of ball valve is called a cavity packing ball valve.
Ball valves are also available in 3-way or 4-way designs. These designs are usually L or T shaped with a hole in the middle. These valves are used for transferring flow to multiple ports simultaneously.