Lug Type Butterfly Valve
consist of a disk which forms a seal against an elastomer or metallic seal. The disc rotates inside the body thereby restricting or allowing the flow. Butterfly valves are very versatile. It can be used for manual or process control, throttling on/off of liquids or gases. They are often used because of their shot take-outs and lower costs
is usually used where the valve is at the end of a pipe since there will be no 2nd flange to secure the studs. Instead, lugs are cast on the valve with tapped holes which matches the bolt pattern for the size and pressure classification of the flange. Bolts are passed through the flange holes and are threaded into tapped holes of the lug
offer several benefits over other types of valve, especially in larger sizes. These valves save weight, space and cost less. Maintenance cost is also low because there are fewer moving parts. Cavitation is also less since there no pockets to trap fluids.more detail please .
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