High Pressure Butterfly Valve

Product Description

Although pipelines are installed with the same valve diameter and form, it is important to note that the pipeline loss coefficient can vary, leading to different flow rates through the valve. It is crucial to avoid a large throttle range for the valve as it can result in cavitation, which can potentially damage the valve. Generally, it is advisable to keep the valve outside a 15° angle.
When a butterfly valve is at a mid-opening degree, the valve body and the front end of the butterfly plate create an opening shape that is centered on the valve shaft. This arrangement causes different conditions on both sides of the valve. On one side, the front end of the butterfly plate moves in the same direction as the flowing water, resembling a nozzle-like opening. On the other side, the front end of the butterfly plate moves against the direction of the flowing water, creating a throttle-like opening. Consequently, the flow rate on the nozzle side is significantly faster than the throttle side, which can result in negative pressure under the throttle side valve. This negative pressure may cause the rubber seal to detach.
The operating torque of a butterfly valve varies depending on the opening and closing directions of the valve. A horizontal butterfly valve, particularly one with a large diameter, exhibits a torque difference due to the water head discrepancy between the upper and lower ends of the valve shaft. This discrepancy should not be ignored. Furthermore, when an elbow is installed on the inlet side of the valve, it creates a bias flow, which increases the torque experienced by the valve. In situations where the valve is in the middle opening, the operating mechanism must be self-locking to counteract the torque exerted by the water flow.
In summary, it is crucial to consider the pipeline loss coefficient and flow rate when installing valves with similar characteristics. The throttle range of the valve should be minimized to avoid cavitation and potential valve damage. Proper alignment of the valve in relation to the flow direction is essential to prevent negative pressure and the detachment of rubber seals. Additionally, the operating torque of the valve can vary based on the opening and closing directions, as well as external factors such as the presence of elbows in the pipeline. Taking these considerations into account ensures the optimal functioning and longevity of the valve system.

Technical Data

Application

Packaging & Shipping

The packing for a single pump set will involve placing it inside plywood cases that are fitted with fixed timbers and lined with plastic film. Let me know if you need any further information regarding the packaging process.

In order to ensure proper packaging and prevent any damages, our factory will have a container loading process in place where we will carefully pack the items. This step is crucial to make sure that the goods are loaded correctly without any harm. We are committed to maintaining the quality of our products throughout the entire shipping process, and the container loading stage plays a vital role in achieving that goal. By closely monitoring this process, we can guarantee that our goods will reach their destination in excellent condition.

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