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API6D 150LB 4inch Flange Ball Valve

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- Material: Cast Steel (ASTM A216 WCB)
- Size Range: 1/2"to 8"
- Pressure Rating: Class 150 to Class 600
- Temperature Range: -29°C to 200°C
- Flow Coefficient (Cv): 4.5 to 680
Availability:
Quantity:
  • Q41F

  • ZJFV/OEM

Floating ball valve is a common industrial valve, characterized by simple structure, good sealing performance, and easy operation. Here are some basic introductions to floating ball valves:


###Structural composition

A floating ball valve is mainly composed of a valve body, a ball body, a valve seat, a valve stem, and a transmission device. The valve body is the main body of the valve, the ball is the opening and closing component, and its sealing surface is the surface of the ball. There are two ways to fix the sphere inside the valve body: floating and fixed. In a floating ball valve, the ball is held by two valve seats and can float. Under the pressure of the medium, the ball is compressed onto the sealing ring on the outlet side to achieve sealing.


###Working principle

The working principle of a floating ball valve is based on the rotational motion of the sphere. When the valve is closed, fluid pressure pushes the ball towards the valve seat, forming a seal to prevent any leakage. As the pressure increases, the force acting on the ball also increases, ensuring a tight seal. When the valve is opened, the ball rotates to allow fluid to flow through the pipeline. This design makes floating ball valves very important in industrial applications that require precise control of fluid flow.


###Application Fields

Floating ball valves are widely used in industries such as petroleum, chemical, natural gas, petrochemical, and coal chemical. They are suitable for long-distance pipelines, distribution systems, and situations where medium flow needs to be cut off or connected.


###Advantages and disadvantages

The advantages of floating ball valves include low flow resistance, simple structure, high cost-effectiveness, and good sealing performance. However, they also have some limitations, such as the fact that the load of the working medium borne by the sphere is entirely transmitted to the outlet sealing ring, which may result in damage to the sealing ring under high pressure or large diameter conditions. In addition, the torque of the floating ball valve may increase with the increase of valve size and pressure.


###Installation and use

The installation direction of a floating ball valve has a significant impact on its performance. Proper installation can ensure the sealing and operational efficiency of the valve. During installation, consideration should be given to the flow direction of the medium, the direction of valve operation, and the convenience of maintenance.


###Special type

There are also some special types of floating ball valves, such as hard sealed floating ball valves, which use metal to metal seals and are suitable for high temperature conditions. They can effectively compensate for the thermal expansion of internal components and avoid jamming caused by high temperatures.


###Conclusion

Floating ball valves have been widely used in the industrial field due to their simplicity, effectiveness, high reliability, and ease of maintenance. However, selecting the appropriate floating ball valve requires consideration of multiple factors such as working pressure, medium type, temperature range, and installation conditions to ensure its optimal performance and long-term stable operation.


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