Working Principle and Precautions of Water Type Butterfly Valve

Water type butterfly valve is a valve used in pipeline systems to control fluid flow. Its characteristic is to open and close the valve by rotating a disc-shaped valve disc .

Working Principle of Water Type Butterfly Valve  

Water type butterfly valve is an important equipment used in pipeline systems to control fluid flow. Its working principle is based on the rotational action of the valve disc (butterfly plate). Specifically, the valve disc is disc-shaped and rotates inside the valve body around its fixed axis. When the valve disc is in a position perpendicular to the pipeline axis, the valve closes, blocking fluid flow; When the valve disc rotates to a position parallel to the pipeline axis, the valve opens, allowing fluid to pass smoothly.

The opening and closing process of water type butterfly valve is usually very rapid, with an opening and closing angle generally less than 90 °, which gives them significant advantages in situations where rapid cutting or adjustment of fluid flow is required. In addition, the structural design of water type butterfly valve  results in relatively small pressure losses when water flows through, which is beneficial for maintaining the hydraulic performance of the pipeline system.

Precautions for Water Type Butterfly Valve 

Installation position and direction: When installing a water type butterfly valve, it should be ensured that its installation position meets the design requirements to avoid excessive stress and vibration on the valve. At the same time, special attention should be paid to the flow direction markings of the valve to ensure that the fluid passes through the valve in the correct direction.

Sealing performance inspection: It is crucial to regularly check the sealing performance of butterfly valves. By observing whether there is any leakage in the closed state of the valve, its sealing performance can be evaluated. If a leak is found, the cause should be promptly identified and corresponding measures should be taken for handling.

Operational flexibility: Maintaining the operational flexibility of water type butterfly valve is crucial for their normal operation. Regularly check whether the valve disc, valve stem and other components rotate flexibly. If there is any jamming or wear, it should be dealt with in a timely manner.

Avoid half open and half closed state: Keeping the water type butterfly valve in a half open and half closed state for a long time will aggravate the wear of the valve disc and seat, affecting the sealing performance and service life of the valve. Therefore, it is advisable to avoid placing the valve in this state for a long time during operation.

Medium adaptability: When selecting a water type butterfly valve, the properties of the medium should be fully considered. For special working conditions such as corrosive or high-temperature media, valve materials with corresponding corrosion resistance and high-temperature resistance should be selected.

Maintenance: Regular maintenance of water type butterfly valve can extend their service life. Maintenance work includes cleaning the interior of valves, replacing damaged components, lubricating rotating parts, etc.

In summary, as a key control device in pipeline systems, water type butterfly valves have a simple and efficient working principle. During use, attention should be paid to following the above precautions to ensure the normal operation of the valve and extend its service life.

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