Rubber pneumatic butterfly valve is the most commonly used product?
Now, rubber pneumatic butterfly valves have been widely used in various industries. Among them, there are automobile manufacturing, railway transportation, maritime transportation and aircraft aviation. So why is he so popular? This is related to his own excellent characteristics.
First, rubber pneumatic butterfly valve is mainly made of rubber. Therefore, it also has the extremely strong elastic properties of rubber. Compared with other steel materials, it is more elastic, lighter, and more conducive to vibration reduction. Moreover, due to the material of rubber, its shape can be modified and selected according to the needs, and its strength can also be trimmed in other ways to achieve the ideal effect. For the above reasons, rubber pneumatic butterfly valve has become one of the indispensable components in industrial consumption. Different types of pneumatic butterfly valves naturally have different functions. For example, the BE type pneumatic butterfly valve consumed by Seles Technology Co., Ltd. in Suzhou is more suitable for installation on small equipment such as water pumps and air conditioning instruments. Especially for the instruments with horizontal disturbing force, it has a very good isolation effect.
The damping value of rubber pneumatic butterfly valve is suitable, the installation mode is rich, and the stability is good. Moreover, when the vibration is relatively large, resistance maintenance will be automatically generated. It can be said that this pneumatic butterfly valve is really a suitable and convenient equipment. It is precisely because of this that this rubber pneumatic butterfly valve made of rubber will also be used in the aerospace field where all kinds of scientific and technological appeals are extremely high.
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Correct Selection of Tetrafluoroethylene Compensator Gas Pipeline and Natural Gas Pipeline Compensator
The gas pipeline will expand with heat and contract with cold due to the change of seasons and the escort medium is higher than normal temperature, and the length will change. When the temperature is high or the pipeline is long, the above elements may cause the pipeline to break beyond its own limit stress, so as to destroy the connected equipment and support. Therefore, the shrinkage amount and the thermal stress generated cannot be ignored, and compensation measures must be taken to reduce the stress generated during the thermal expansion and cold contraction of the pipeline, so as to reduce the thermal stress below the allowable stress of the pipeline, so as to ensure the stable and safe operation of the pipeline. At present, there are many kinds of gas pipeline compensators. Designers must fully understand the characteristics of various compensators, and can correctly select the appropriate compensators.
There are many types of corrugated compensators for gas, mainly including the following types:
(1) Axial type corrugated compensator. It is a flexible component composed of a corrugated element and two receivers (or flanges) that can be connected with adjacent pipes and equipment. It is mainly used for compensating axial displacement of straight pipe section. The compensator is located between two fixed supports, and one end is close to one fixed support. The compensator cannot restrain the pressure thrust of the pipeline, and the pressure thrust is accepted by the fixed pipe supports on both sides.
(2) Free compound type ripple compensator. It is a flexible component composed of two identical corrugated elements, two receivers (or flanges) that can be connected with adjacent pipes and equipment, and a center, mainly used for compensating axial displacement and transverse displacement of straight pipe section.
(3) Pull rod type corrugated compensator. It is a flexible part composed of two identical corrugated elements, two receivers (or flanges) that can be connected with adjacent pipes and equipment, one interpipe, and a group of flexible parts that can accept pressure and thrust. It mainly uses ten compensations and one horizontal displacement. The compensator can restrain the pressure thrust of the pipeline, and the fixed pipe support of the PTFE compensator can not consider accepting the pressure thrust of the pipeline.
The advantage of the corrugated compensator is that it is manufactured by an advanced one-step hydraulic forming process without damage to the bellows. The product features high dimensional accuracy, long service life, reliable performance, compact structure, large compensation amount, long fatigue life, high pressure bearing ability, common materials, simple piping, no maintenance and other characteristics in engineering applications, large caliber, high temperature resistance, and strong resistance to stress corrosion. However, it also has defects that are not easy to deal with: for example, the axial type corrugated compensator produces pressure and thrust on the fixed support, resulting in a large thrust of the fixed support, which leads to high cost; In addition, the corrugated compensator pipe wall is too thin to accept torsion and vibration, and its safety is poor; A series of defects, such as high equipment investment, strict design requirements, high accuracy of construction equipment, and often not reaching the expected life, are found.
In the natural gas pipeline, pressure or thermal contraction compensation installation shall be set at intervals to reduce and release the stress generated by the pipeline and ensure that the pipeline works stably and safely under stress. At the same time, the devices of the compensator and its support should be stopped strictly according to the construction procedures. The incorrect devices of the tetrafluoroethylene compensator often make the compensator lose its proper function, which will bring safety hazards to the pipeline operation.