What is the difference between flange butterfly valves and wafer butterfly valves
date:2023-07-12 08:50
The clamp butterfly valve itself does not have a flange and is connected by squeezing the pipeline flange. Generally, double headed bolts are used for connection. The flange butterfly valve itself has a flange, which is the same as ordinary gate valves. The function is similar, used for gas pipelines in the sulfuric acid industry: furnace front blower inlet and outlet, relay blower inlet and outlet, electric demister series and connecting valves, S02 main blower inlet and outlet, converter adjustment, preheater inlet and outlet adjustment, and cut-off gas usage. Used in the sulfur burning, conversion, and dry suction sections of the sulfur based sulfuric acid production system, it is a brand of valves used in sulfur based sulfuric acid plants. It is widely recognized by users as a butterfly valve with good sealing performance, light operation, side corrosion, high temperature resistance, easy operation, flexibility, and safe and reliable use, and has been widely promoted and used.
The flange butterfly valve has a simple structure, small volume, and light weight, and is only composed of a few parts. Moreover, the valve can be quickly opened and closed by rotating it 90 °, with simple operation and excellent fluid control characteristics. The butterfly plate of the 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, with a rotation angle between 0 ° and 90 °. When the rotation reaches 90 °, the valve is fully open. When the flange butterfly valve is in the fully open position, the thickness of the butterfly plate is the resistance of the medium flowing through the valve body, so the pressure drop generated through the valve is very small, so it has good flow control characteristics. Butterfly valves have two types of sealing: elastic sealing and metal sealing. Elastic sealing valve, the sealing ring can be embedded on the valve body or attached to the periphery of the butterfly plate.
Flange butterfly valves are classified according to their connection methods:
(1) Wafer butterfly valve: The butterfly plate of the wafer 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 axially, with a rotation angle between 0 ° -90 °. When rotated to 90 °, the valve is in a fully open state. The wafer type butterfly valve has a simple structure, small volume, and light weight, and is only composed of a few parts. Moreover, the valve can be quickly opened and closed by rotating it 90 °, with simple operation and excellent fluid control characteristics. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the resistance of the medium flowing through the valve body, so the pressure drop generated through the valve is very small and has good flow control characteristics. There are two types of sealing: elastic sealing and metal sealing. Elastic sealing valve, the sealing ring can be embedded on the valve body or attached to the periphery of the butterfly plate.
(2) Flange butterfly valve: The flange butterfly valve is a vertical plate structure, and the valve stem is an integral metal hard seal. The sealing ring of the valve is a composite structure of flexible graphite plate and stainless steel plate, installed on the valve body, and the sealing surface of the butterfly plate is welded with stainless steel. The sealing ring of the soft seal valve is made of Nitrile rubber and installed on the butterfly plate. Flange type soft seal butterfly valve
