Butterfly valveThe butterfly plate is installed in the diameter direction of the pipe.In the cylindrical passage of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, the rotation angle is between 0#176; ~90#176;, when it rotates to 90#176;, the valve is fully open.The butterfly valve is simple in structure, small in size and light in weight, and consists of only a few parts.And only need to rotate 90#176; can quickly open and close, the operation is simple, at the same time,
valveHas 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 small, so it has better flow control characteristics.The butterfly valve has two sealing types: 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 butterfly plate.Valves with metal seals generally have a longer life than valves with elastic seals, but it is difficult to achieve a complete seal.The metal seal can adapt to higher working temperature, while the elastic seal has the defect of being limited by temperature.If the butterfly valve is required to be used as a flow control, the main thing is to correctly select the size and type of the valve.The structure principle of butterfly valve is especially suitable for making large-diameter valves.
Butterfly valveIt is not only widely used in general industries such as petroleum, gas, chemical industry, water treatment, etc., but also used in cooling water systems of thermal power stations.Commonly used butterfly valves include wafer type butterfly valves and flange type butterfly valves.Wafer type butterfly valve uses double-head bolts to connect the valve between two pipe flanges. Flange type butterfly valve has flanges on the valve, and bolts are used to connect the flanges at both ends of the valve to the pipe flanges.The strength performance of the valve refers to the ability of the valve to withstand the pressure of the medium.
valveIt is a mechanical product that bears internal pressure, so it must have sufficient strength and rigidity to ensure long-term use without cracking or deformation
