Relevant inspection of pneumatic butterfly valve cannot be ignored?
As usual, the economy is expanding faster and faster, the number of family cars is also increasing, and the average age of cars is increasing year by year. This problem of pneumatic butterfly valve appears!
With the gradual increase of the average vehicle age, the internal aging phenomenon of pneumatic butterfly valve has become more and more serious. However, in general, it is too late for a broad driver friend to feel or feel anything about it. The aging of pneumatic butterfly valve not only has a great impact on the warmth of the car, but also directly affects the safety of driving. So we suggest that you change the pneumatic butterfly valve every 20000 km. For warmth and security.

Application of Pneumatic Butterfly Valve in Machinery Enterprises
Pneumatic butterfly valve is a pipe fitting that uses the central element of bellows to deliver various fluids. Its working nature plays a compensation role in the connection between pipelines, pipelines and equipment, and equipment and equipment. The pneumatic butterfly valve compensates the position deviation of the pipeline system due to the device with its bending disturbance, and bears the relative displacement required for the two breaking points to work very well. In some pipeline systems, it also plays a role in reducing vibration and noise.
1、 Definition
The annular or spiral bellows with the surface armored metal wire or mechanical belt braided mesh sleeve and the slenderness ratio greater than or equal to 3 are called pneumatic butterfly valves. In Europe and the United States, it is used to call its flexible tube, corrugated hose or pneumatic butterfly valve.
2、 Variety
There are many ways to classify pneumatic butterfly valves. According to the classification, stainless steel valves are corrosion-resistant and carbon steel valves are non corrosion-resistant. According to the assembly mode, it can be divided into machine clamp type for mechanical clamping and welding type for welding combination. According to pressure grade, it can be divided into: for machinery manufacturing industry, 0-2.5Mpa is low pressure, 2.5-16Mpa is medium pressure, and 16-32Mpa is high pressure. For petrochemical industry, 0-1.6Mpa is low pressure, 1.6-10Mpa is medium pressure, and 10-100Mpa is high pressure. According to the service scope: aerospace, aviation, shipbuilding, nuclear, petrochemical, steel, construction, light industry. According to the connection mode, it can be divided into ball joint type, receiving type, flange type, taper pipe thread type quick connector type, etc. This website lists some common and commonly used connection methods for reference.
3、 Three functions: 1. Reduce the device stress of the pipeline In a complex pipeline system, due to the constraints of space and location conditions, it often causes various difficulties in the work of the device. The formed pipe cannot be installed, bent, and straightened. It is impossible to prevent the cold correction of parts of the installed pipe. According to the pipe diameter and the detailed situation on site, the cold correction amount ranges from several millimeters to tens of millimeters, some hundreds of millimeters. Theoretically, the greater the amount, the higher the internal stress. These residual device stresses in the pipeline system are undoubtedly a great hidden danger. Since the pneumatic butterfly valve can be bent at will and the internal stress generated by bending under the condition of rated bending radius is very small, it can bring great convenience to the operation of the device and play a role in the safe operation of the pipeline system. This is the main reason why some pipeline systems must use pneumatic butterfly valves.
2. The problem of displacement compensation exists in the refueling of automobiles, trains and aircraft, the filling tank of acetylene liquefied gas, the operation of paper machines, printing and dyeing machine drying rollers, etc., which need to be handled with flexible pipes. According to the old design ideas, these are mostly copper serpentine tubes or rubber tubes. Because they have some problems at different levels, they often bring difficulties to industrial consumption, operation and maintenance.