The control system of butterfly valve

by Admin / Wednesday, 07 January 2015 / Published in Human Resources
Manual butterfly Butterfly valve's butterfly plate installed on the pipe diameter direction. Butterfly valve body in a cylindrical channel, disc -shaped disc around the axis of rotation, rotation angle between 0 ° -90 °, rotated to 90 °, the valves are open all license conditions.
Butterfly valve structure is simple, small size, light weight, only by a few parts. And just rotate 90 ° to quickly open and close, easy to operate, while the fluid control valve has good features. Butterfly valve is fully open position, the disc thickness is only when the medium flows through the body resistance, produced by the valve pressure drop is small, it has a better flow control characteristics. Butterfly valve sealing elastic sealing and two metal seal type. Elastic sealing valves, seals can be mounted on the body or attached to the disc periphery.
With long metal seal valve life in general than the elastic sealing valve, but it is difficult to completely seal. Metal seal can adapt to higher operating temperature, flexible seal is restricted by temperature defects.
If you require the use of flow control butterfly valve as the main choice is the right size and type of valve. Butterfly valve structure principle is particularly suitable for the production of large diameter valves. Butterfly valve is widely used not only in the oil, gas, chemical, water treatment and other general industries, but also for the thermal power plant cooling water system.
Commonly used butterfly valve has two kinds of clip-valve butterfly valve and flange type butterfly. Wafer type butterfly valve with studs to connect the valve between the two pipe flanges, flanged butterfly valve is a valve with a flange with bolt flanged ends of the valve on the pipe flange.
Applications
Gas pipeline for the sulfuric acid industry: blast furnace blower entrances, entrance fan relay, electric defogging and Unicom valve series, S02 main blower entrances converter regulation, such as regulation and preheater entrances off gas use.
Sulfuric acid is used in the system burning sulfur, transformation, drying and absorption section is sulfuric acid plant with a valve preferred brand, the majority of users considered to be: good sealing performance, easy to operate light and vice corrosion, high temperature, operation, flexible, safe and reliable butterfly, got a lot to promote the use.
Also widely used: chemical, petrochemical, metallurgy, medicine, food and other industries in SO2, steam, air, gas, ammonia, CO2 gas, oil, water, salt, lye, water, nitric acid, hydrochloric acid, sulfuric acid, phosphoric acid pipeline and other media used as a regulation and closure devices.
This article comes from Baidu Encyclopedia Manual Butterfly
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