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A split butterfly valve, also known as a two-piece butterfly valve, is a type of industrial valve that consists of two separate halves, usually with a flange connection, which can be easily split apart for maintenance or repair purposes. This design allows for quick access to the valve internals without the need to remove the entire valve from the pipeline. Split butterfly valves are commonly used in industries where frequent inspection, cleaning, or maintenance is required. Here are the key features and benefits of split butterfly valves:

Two-Piece Design: The valve is divided into two halves along its centerline, creating two separate pieces. These halves are held together by bolts and can be quickly separated for access to the internals.

Flanged Connection: Split butterfly valves often have flanged end connections, which allow for easy installation and disassembly. The flanges provide a secure and leak-tight connection to the pipeline.

Maintenance and Repair: The primary advantage of the split design is the ease of maintenance and repair. When maintenance is required, the valve can be disassembled by removing the bolts, and one side can be lifted away without disturbing the pipeline or the other components. This saves time and reduces downtime during maintenance operations.

Replaceable Seat: Split butterfly valves commonly feature a replaceable seat, which is the sealing surface that comes into contact with the disc. When the seat becomes worn or damaged, it can be replaced without replacing the entire valve.

Simple Operation: Like other butterfly valves, split butterfly valves are operated by rotating a disc or vane in the center of the pipe to control the flow. They offer relatively low operating torque and quick opening/closing characteristics.

Wide Range of Applications: Split butterfly valves are versatile and find applications in various industries, including water and wastewater treatment, chemical processing, food and beverage, pharmaceuticals, and more.

Cost-Effective Solution: The ease of maintenance and the ability to replace specific components make split butterfly valves a cost-effective choice in applications where frequent inspections and repairs are necessary.

Bi-Directional Flow: Split butterfly valves typically allow bi-directional flow, which means they can handle flow in both directions.

It's essential to consider the application requirements and the specific operating conditions when selecting a split butterfly valve. Factors such as pressure, temperature, flow rate, and the type of media being handled should be taken into account to ensure the valve's proper functioning and longevity.

As with any industrial valve, regular maintenance, inspection, and adherence to manufacturer guidelines are crucial to ensure the valve's reliability and safety. Proper installation and correct torque settings for the bolts during reassembly are essential to prevent leakage and ensure proper valve operation.