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Lug Butterfly Valve Introduction

The lug type butterfly valve can be driven by manual, worm gear, pneumatic and electric, connected by flange and pair clamp, with single eccentric, middle line, double eccentric and triple eccentric structure. The sealing structure can be soft seal and hard seal. The pressure range is pn0.1-10mpa, and the nominal diameter is dn40-2000mm. The material can be cast steel and stainless steel. Because the valve is widely used, the same kind of valve has different matching in different occasions and working conditions.

The butterfly plate of the wafer type lug butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical passage of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis with a rotation angle of 0 °- ninety ° Between, rotate to 90 ° At the same time, the valve is fully open.

Lug Butterfly Valve Structure

Lug type butterfly valve is connected between two pipe flanges with stud bolts. It is simple in structure, small in volume and light in weight, and only consists of a few parts. And it’s only 90 degrees ° The valve can be opened and closed quickly, and the operation is simple. At the same time, 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 through the valve is very small, so it has good flow control characteristics. The butterfly valve has two sealing types: elastic seal and metal seal. Elastic seal valve, seal ring can be embedded in the body or attached to the butterfly plate around.

Lug Butterfly Valve Application

The lug butterfly valve is not only widely used in petroleum, gas, chemical industry, water treatment and other general industries, but also used in the cooling water system of thermal power station. It is used for gas pipeline in sulphuric acid industry: inlet and outlet of blower in front of furnace, inlet and outlet of relay fan, electric demisting series connection valve, inlet and outlet of sulfur dioxide main blower, converter regulation, inlet and outlet of preheater, etc. It is used in sulfur burning, conversion and dry absorption section of sulfur burning sulphuric acid system. It is the preferred brand of valves for sulfur burning sulphuric acid plant. It is considered by the majority of users as butterfly valves with good sealing performance, light operation, by-product corrosion, high temperature resistance, convenient and flexible operation, safe and reliable use, and has been widely used.

Lug type butterfly valve is also widely used in chemical, petrochemical, smelting, pharmaceutical, food and other industries, such as SO2, steam, air, gas, ammonia, CO2 gas, oil, water, brine, lye, seawater, nitric acid, hydrochloric acid, sulfuric acid, phosphoric acid and other medium pipelines, as regulating and intercepting devices.