Pneumatic Lug Butterfly Valve
Product introduction The lug type butterfly valve can be driven by manual, worm gear, and pneumatic; the connection method can be selected from flange or wafer; The pressure range is PN0.1-10Mpa, the nominal diameter is DN40~800mm, and the material can be cast steel or stainless steel. Due to...
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Product Introduction
Product introduction
The lug type butterfly valve can be driven by manual, worm gear, and pneumatic; the connection method can be selected from flange or wafer; The pressure range is PN0.1-10Mpa, the nominal diameter is DN40~800mm, 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¡ã and 90¡ã. When it rotates to 90¡ã, the valve is fully open.
Wafer type butterfly valve is to connect the valve between two pipeline flanges with stud bolts. Its structure is simple, small in size and light in weight, and only consists of a few parts.
Scope of application
Butterfly valves are not only widely used in general industries such as petroleum, gas, chemical, and water treatment, but also in cooling water systems in thermal power plants.
It is used for gas pipelines in the sulfuric acid industry: the inlet and outlet of the blower in front of the furnace, the inlet and outlet of the relay fan, the series and connecting valves of electric demister, the inlet and outlet of the S02 main blower, the adjustment of the converter, the inlet and outlet of the preheater, etc. and the use of cut-off gas.
It is used in the sulfur incineration, conversion, and dry suction sections of the sulfuric acid system. It is the preferred brand of valves for sulfuric acid plants. It is considered by the majority of users as: good sealing performance, light operation, secondary corrosion, high temperature resistance, convenient operation, Flexible, safe and reliable butterfly valves have been widely used.
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.
Structural features:
¢Ù The unique design of three-way eccentricity enables frictionless transmission between the sealing surfaces and prolongs the service life of the valve.
¢ÚElastic seal is produced by torque.
¢ÛThe ingenious wedge-shaped design enables the valve to have the automatic sealing function of closing and tightening, and the sealing surfaces have compensation and zero leakage.
¢ÜSmall size, light weight, light operation and easy installation.
¢Ý According to user requirements, pneumatic and electric devices can be configured to meet the needs of remote control and program control.
¢Þ The material of the replacement parts can be applied to various media, and the lining can be anti-corrosion (lining F46, GXPP, PO, etc.).
The performance of wafer butterfly valve and gate valve is compared. Compared with ordinary butterfly valve and gate valve with the same nominal pressure and nominal diameter, the tightness of gate valve is better than that of butterfly valve.
The gate valve is bulky and takes up a lot of space.
Butterfly valves are small in size and take up little space.
The temperature of the medium, the sealing and packing of the valve should also be considered when the specific selection is made.
The specification stipulates the use of butterfly valves with a nominal diameter greater than 50.
The high-performance manual wafer butterfly valve adopts a double eccentric and a special inclined cone elliptical sealing structure. It solves the disadvantage that the sealing surface of the traditional eccentric butterfly valve is still in sliding contact friction at the moment of opening and closing 0¡ã~10¡ã. good purpose.
Standard specification:
Design and manufacture standard: GB/T 12238-2008, ANSI B16.34, API609, MSS SP-68, JIS B2032, JIS B2064
Structure length standard: GB/T 12221-2005, API609, JIS B2002
connecting flange standard : GB/T 9113, JB79, SH3406, HG20592, ASME B16.5, ASME B16.47, API605, JIS B2212
Pressure and temperature class: GB/T 12224-2005
Test and inspection standard: GB/T 13927-2008, API598, JIS B2003
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