| Media: | Gas, Water, Steam |
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| Material: | CF8, Wcb |
| Connection Form: | Double Flange |
| Driving Mode: | Electric, Manual |
| Nominal Pressure: | ANSI CLASS 150-900 |
| Channel: | Straight Through Type |
| Samples: |
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| Customization: |
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An eccentric rotary half ball valve is a type of valve used in various industrial applications to control the flow of fluids.
Unlike traditional ball valves that have a full sphere, a half ball valve has only half of a sphere. This design allows for more precise control over flow rates and provides better sealing capabilities.
As the name suggests, this valve operates by rotating a half ball or disc within the valve body. This rotational movement regulates the flow of fluids through the valve.
In summary, eccentric rotary half ball valves offer efficient and precise flow control, making them a valuable component in industrial piping systems where reliability and performance are paramount.
Eccentric rotary half ball valves offer several advantages over traditional valve designs. Here are some key benefits:
Precise Flow Control: The eccentric design and half ball configuration allow for precise modulation of flow rates, enabling fine-tuning of processes and systems.
Reduced Wear and Tear: The off-center positioning of the ball reduces friction and wear on the valve components, leading to longer service life and lower maintenance costs.
Excellent Sealing: The eccentric design ensures a tight seal even under high pressures, minimizing the risk of leakage and enhancing system reliability.
Low Pressure Drop: The streamlined flow path through the valve results in minimal pressure drop, maximizing efficiency and reducing energy consumption.
Versatility: Eccentric rotary half ball valves are suitable for a wide range of applications, including corrosive and abrasive fluids, thanks to their robust construction and effective sealing capabilities.
High Pressure/Temperature Performance: These valves are designed to withstand extreme operating conditions, making them ideal for applications where high pressures and temperatures are involved.
Reduced Cavitation and Erosion: The smooth flow path and precise control offered by eccentric rotary half ball valves help mitigate issues such as cavitation and erosion, prolonging the lifespan of downstream equipment.
Automation Compatibility: These valves can be easily integrated with automation systems using pneumatic, electric, or hydraulic actuators, enabling remote control and monitoring for enhanced operational efficiency.
Valve Positioning: In its default position, the half ball is rotated to allow for unobstructed flow through the valve. This positioning enables fluid to pass through the valve with minimal resistance.
Flow Control: To adjust the flow rate, the half ball is rotated about its eccentric axis, which is offset from the centerline of the valve body. As the half ball rotates, the effective flow area changes, regulating the flow of fluid through the valve.
Sealing Mechanism: When the half ball is rotated to partially obstruct the flow path, it creates a seal against the valve seat, effectively shutting off the flow of fluid. The eccentric design ensures that the seal remains tight even under high pressures, preventing leakage.
Actuation: Eccentric rotary half ball valves can be operated manually or automatically using pneumatic, electric, or hydraulic actuators. Actuators provide the necessary torque to rotate the half ball, allowing for remote control and automation of the valve operation.
| Stainless Steel Ball Valves | Brass Ball Valves | |
| Material Composition | Iron alloy made from nickel and chromium (and sometimes molybdenum) | Copper alloy that includes zinc and occasionally additional metals |
| Cost | More costly than leaded and lead-free brass ball valves | Less costly than stainless steel ball valves, more costly than plastic ball valves |
| FDA Approval | Approved by the FDA for use in the food and beverage industry | Not approved by the FDA unless certified lead-free |
| Softness | Harder than brass, making it more challenging to seal (for example, by welding) | Softer than stainless steel, making it more easy to seal (for example, via welding) and more efficient to machine |
| Corrosion Resistance | Highly corrosion resistant; the preferred material for use in corrosive environments, including marine applications | Can withstand corrosive environments better than plastic but not as well as stainless steel; however, can be compatible with some materials not compatible with stainless steel |
| Pressure Ratings | Higher pressure ratings than brass; more resistant to high pressure | Lower pressure ratings than stainless steel; less resistant to high pressure |
| Temperature Resistance | Can handle and last longer at higher temperatures than brass ball valves | Not as suitable for high temperature situations as stainless steel ball valves |
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