In the 30 s of the last century, the United States invented the butterfly Industrial Valves, was introduced into Japan, 50 s and 60 s was widely used in Japan, and popularized in our country is after 70 s. Small operation torque, small installation space and light weight. About 2 t DN1000, for example, butterfly valves, gate valves and about 3. 5 t, and butterfly valves easily combined with various drive, good durability and reliability. In the daily work of the failure and elimination method of butterfly valve: 1, before installation please make sure the product performance, and whether the medium flow arrow is consistent with the movement conditions, and the valve cavity clean, do not allow foreign impurities in sealing ring and disc attached, before cleaning must not allow closing butterfly plate, so as not to damage the sealing ring. 2, disc plate installation supporting disc valve special flange, flange recommended HGJ54 - namely The type 91 socket welding steel flange. 3, installed in the pipeline position, the best location for the vertical loading, but can't flip. 4, use the traffic needs to adjust, a worm gear box control. 5, on and off a lot of disc valve, in 2 months time, open the worm gear case cover, check whether the butter is normal, should keep the right amount of butter. 6, check the connection parts require compaction, namely to ensure that the packing bees, guaranteeing stem flexible rotation. 7, the metal sealing butterfly valve products are not suitable for installation in the end of the pipe, such as must be installed in the end of line, take equipped with outlet flange, prevent the backlog of sealing ring, too. 8, stem installation using regular check valve using effect, find fault in a timely manner to eliminate. 9, the possibility of failure in a timely manner to eliminate method as bellow: butterfly Industrial Valves common failures and solutions may be the cause of the problem of leaking 1, butterfly plate, seal face with sundry 2, butterfly plate, seal face closed position match against three configuration, export side flange bolt uneven or not according to figure 4, pressure direction to have not been in accordance with the requirements of figure a elimination method 1, eliminate impurities, clean the valve inner cavity 2, adjust the adjusting screw of worm gear or electric actuator, so as to achieve the valve closed position 3, check the correct fittings flange plane and the bolt clamping countries, should be uniform pressure 4, according to the two end face pressure Industrial Valves leak sealing direction pointed to eliminate method 1, 2 on both sides of the sealing gasket failure, pipe flange uneven tension or compression. 3, sealing ring, sealing gasket under failure elimination method 1, 2, replace the sealing gasket compression flange bolts ( The uniform stress) 3, unload valve pressure ring, replace the sealing ring, failure gaskets butterfly valve can be divided into the form of the structure offset plate, vertical plate, inclined plate and leveraged. Can be divided into the form of the sealed type soft seal and hard seal type two kinds. Soft seal type generally use rubber ring seal, metal hard seal type usually adopt ring seal. According to the connection type can be divided into flange and clamp connection; According to the methods can be divided into manual transmission, gear transmission, pneumatic, hydraulic and electric.
Wow, this sounds like a bit of a cruel question, but it is a vitally important question to ask yourself if you are struggling with your resilient seated valve and you would like to stop the resilient wedge gate valve problem.
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