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What is a lug type butterfly valve

21 views Source: VALTEC China Valve Manufacture CO.,LTD

The lug type butterfly valve can be driven by manual, worm gear, pneumatic or electric; the connection method can be selected from flange or wafer; Sealed, the pressure range is PN0.1-10Mpa, the nominal diameter is DN40~2000mm, and the material can be cast steel or stainless steel. Due to the wide range of valves used, the same valve has different matching in different occasions and working conditions.

The disc of the wafer lug butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0° and 90°. When it rotates to 90°, the valve is fully open.

lug type butterfly valve

Lug type butterfly valve structure

Wafer type lug butterfly valve is to connect the valve between two pipeline flanges with stud bolts. Its structure is simple, small in size, light in weight, and only consists of a few parts. And it only needs to rotate 90° to open and close quickly, the operation is simple, and the valve has good fluid control characteristics.
When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is very small, so it has better flow control characteristics. Butterfly valves have two types of seals: elastic seal and metal seal. Elastic sealing valve, the sealing ring can be inlaid on the valve body or attached to the periphery of the disc.

Scope of application of lug butterfly valve

The lug butterfly valve is also widely used in: SO2, steam, air, gas, ammonia, CO2 gas, oil, water, brine, lye, seawater, nitric acid, hydrochloric acid in chemical, petrochemical, smelting, pharmaceutical, food and other industries , Sulfuric acid, phosphoric acid and other media pipelines are used as adjustment and shut-off devices

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