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Regarding common butterfly valve connection methods, wafer-type butterfly valves are the least expensive, followed by lug-type butterfly valves; the cost of flange-type butterfly valves is the highest and is directly related to the total weight. It needs to be clarified from the pertinent standard whether the lug-type pressure hole is a through hole or a threaded hole, even though both types are available on the market.
Compared to the flange types, this installation is even more stable. One integral flange on the lug-type body has the same whole pattern as the pipe flanges. At the center of each hole, two taps are made from opposing directions. The body can be positioned between two flanges with this style.
A stud bolt can be threaded into the integral flange through the piping flange and tightened with a nut to secure the complete flange connection. When thermal expansion occurs, straight-through bolting presents risks and small-size designs cannot accommodate two integral flanges, lug-style designs are typically employed.
Lug-type butterfly valves are essential components in various industries, playing a crucial role in controlling the flow of fluids. These valves are known for their reliability, ease of installation, and cost-effectiveness. Here will explore the key features of lug-type butterfly valves.
One distinctive feature of lug-type butterfly valves is their lug-style body. The valve has threaded inserts or lugs on both sides, allowing it to be directly bolted between two flanges. The lugs provide a secure and straightforward method for valve installation and removal without disrupting the entire pipeline. This design makes lug-type butterfly valves ideal for applications where space is limited or frequent maintenance is required.
Lug-type butterfly valves are designed for bi-directional flow control. They can effectively control the flow of fluids in both directions, offering versatility in various applications. The sealing mechanism of these valves ensures a tight closure in either direction, preventing leakage and providing reliable shut-off capabilities. This feature is particularly important in systems where the direction of fluid flow may change.
Lug type butterfly valves find application in a wide range of industries, including water treatment, HVAC, chemical processing, and more. Their versatility is attributed to their ability to handle various media such as water, air, gasses, and some corrosive fluids. The valves are available in different materials, including stainless steel, cast iron, and PVC, allowing users to select the most suitable option based on the specific requirements of their application.
The lug design of these butterfly valves simplifies the installation process. The valves can be easily mounted between two flanges using bolts, making it convenient for both initial setup and future maintenance. This feature is advantageous in situations where quick valve replacement or repair is necessary, minimizing downtime and reducing overall operational costs.
Lug types butterfly valves are engineered to provide bubble-tight shut-off, ensuring that there is minimal to no leakage when the valve is in the closed position. This characteristic is essential in applications where precise flow control is required, and any leakage could lead to operational inefficiencies or safety concerns. The tight shut-off capability contributes to the overall reliability and performance of these valves.
Lug types butterfly valves offer a cost-effective solution for flow control in comparison to some other types of valves. Their simple design, ease of manufacturing, and efficient operation contribute to their affordability. Additionally, the reduced need for complex installation procedures and maintenance further lowers the overall cost of ownership.
Flange types butterfly valves are a specific category of butterfly valves designed to be connected to pipelines using flanges. These valves are widely used in various industries for their versatility, ease of installation, and reliability in controlling the flow of fluids. The flange connection ensures a secure and leak-tight joint, providing a straightforward method for installation and removal during maintenance.