chinasealcon

  Difference between Single and Double Mechanical Seal   The basic types of mechanical seals for pumps are classified as single mechanical seal , double mechanical seals and series mechanical seals. The single end face mechanical seal consists of a pair of sealing ends; The double mechanical seal consists of two sealing ends. The mechanical seals made up of two or two sets of mechanical seals with E single direction mechanical seals are series mechanical seals. The following two main types of mechanical seals are mainly described to understand the difference between single and double mechanical seals.     Single mechanical seal pump The single mechanical seal has the advantages of simple structure, low manufacturing cost, convenient installation and operation, and is generally used for oil, water, organic solvents and corrosive medium. There are vertical single stage pipeline centrifugal pumps and horizontal centrifugal pumps which use single side seal pumps.   ...

  Coke dry quenching  is a kind of coke quenching method using inert gas to cool the red coke. During the dry quenching process, the red coke is loaded from the top of the coke dry quenching furnace. The low temperature inert gas is blew into the red coke layer of the cooling section of the dry quenching furnace by the circulating fan, and then the red coke is absorbed into the boiler for heat exchange. The coke after the cooling is discharged from the bottom of the dry quenching furnace through the coke exhaust system, which is composed of flat gate, adjusting rod, vibration feeder, rotating sealing valve and double chute. And the rotary seal valve  is the most important part of the coke dry quenching and coking system.   The structure and principle of the coke dry rotary quenching seal valve:   coke dry rotary quenching seal valve (also called rotary discharge valve, format seal valve) is installed at the bottom of the dry quenching furnace. The feeding port i...

  Pump with a wide range of mechanical seals, different models, but there are five major leaks: Seal between sleeve and shaft; Seal between movable ring and shaft sleeve; Dynamic and static ring seal; The seal between the static ring and the static ring seat; Seal between the end cap and the pump body. In general, the shaft between the shaft, the seal between the end of the cover and the leakage between the pump is easier to find and solve, but the need for careful observation, especially when the working medium for liquefied gas or high pressure, toxic and harmful gases, the relative difficulties some. The rest of the leak is intuitively difficult to distinguish and judge, to be in the long-term management, maintenance practice on the basis of the symptoms of leakage observation, analysis, judgment, in order to draw the correct conclusion.   Analysis and judgment of leakage Installation of static test leak. Mechanical seal installation and commissioning, the general to conduc...

  Bellows is a corrugated tube shaped elastic part which can be used in the component of the mechanical seal compensation ring, which can be expanded under the external force or self elastic force and compensates the auxiliary seal of the ring. The bellows type mechanical seal has no relative sliding on the shaft, no abrasion on the shaft, and good follow-up, and is widely applied to the pump products, like water pump seals . HTB series anti-corrosion engineering plastic pumps are widely used in petrochemical, mining, chemical and pharmaceutical industries, and are used to transport toxic and harmful chemical media including acid, alkali, pulp and sewage. Therefore, it has special requirements for its anti-corrosion, high wear resistance and anti-leakage. The mechanical seal of this series of pumps is made of polytetrafluoroethylene bellows. Teflon bellows  require high precision, low elastic modulus of material, easy deformation of corrugated structure and difficult turning. ...

  Mechanical seal of the symptoms and elements Mechanical seal parts of the rotation equipment in the running side, sealed face often show wear, hot cracking, deformation, damage and other conditions, tension with a long time will be loose, cracking and corrosion. Auxiliary seal will also show cracks, distortion and deformation, break and other conditions. Mechanical seal oscillation, fever problems elements.During the rotation of the device, the dynamic ring conforms to the rough face, and the gap between the dynamic ring and the seal cavity is too small, because the vibration causes the bump to cause oscillation. Sometimes due to sealing the end of the corrosion resistance and poor temperature function, or lack of cooling or face in the device when the folder with particles of impurities, will also cause the mechanical seal of the oscillation and heat. Mechanical seal media leakage of the elements of the problem   Static pressure test leak. Mechanical seal in the device beca...

  According to statistics, about 80% to 95% of the leakage of mechanical seals is caused by sealing faces and friction pairs. Flygt pump seals has this problem. In addition to keeping the sealing surface parallel, it is mainly the material problem of the friction pairs. The design of most mechanical seals uses stiffer materials to make the revolving surface, so that it can rotate friction on the soft stationary surface. The rotating surface is now made of stainless steel or harder material, such as tungsten carbide or silicon carbide. Graphite or Teflon is used for stationary surfaces.   Material selection of mechanical seal friction pairs is a complex problem. In general, it should be selected according to the properties of the working medium, pressure, temperature and rotation speed, and the ability to withstand short time friction when the pair is started or the liquid film is destroyed. Taking into account the above factors, the material of the friction pair should have th...

  In recent years, our country's economy continues to develop steadily, and at the same time, the demand for power supply is increasing continuously, and now the main channel of power production is the hydropower plant, so the hydropower plant is now closely connected with the people's life. Water turbine is an important part of hydropower plants. And as for water turbine, the main shaft seal is its indispensable component. But the main shaft seal is easy to fail, and its safety cannot be guaranteed, so it is a problem to be solved urgently in the current domestic hydropower industry. At present, the water turbines usually operate in high pressure and high-speed environment, which causes great pressure on the pump seals . The pump sealing parts of the turbine are easily worn by the sediment in the water, and the leakage often occurs, which makes the working efficiency of the water turbine decline rapidly and its reliability is also reduced, so regular sealing part replacement i...