Globe valve, also known as cut-off valve, is a mandatory sealing valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. When the medium enters the valve from under the valve disc, the resistance that the operating force needs to overcome is the friction force between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the valve stem The diameter of the valve should be large, otherwise the failure of the top of the valve stem will occur. According to the connection method, it is divided into three types: flange connection, thread connection and welding connection. After the appearance of the self-sealing valve, the medium flow direction of the globe valve is changed from the top of the valve disc into the valve cavity. At this time, under the action of the medium pressure, the force to close the valve is small, but the force to open the valve is large, and the diameter of the valve stem can be adjusted accordingly. decrease. At the same time, under the action of the medium, this form of valve is also tighter. my country's valve "Three Chemicals" once stipulated that the flow direction of the globe valve should be from top to bottom. When the globe valve is opened, the opening height of the valve disc is 25% to 30% of the nominal diameter. The flow rate has reached the maximum, indicating that the valve has reached the fully open position. Therefore, the fully open position of the globe valve should be determined by the stroke of the valve disc. Shut-Off Valve,Shutoff Valve,Automatic Shut Off Valve,Auto Shut Off Valve Jiangsu Qiantu Trading Co., Ltd. , https://www.qiantupump.com
MAN Truck Group, a heavy-duty truck company in Germany, announced that it will acquire Volkswagen's truck and bus business unit (Volkswagen Truck & Bus) in Brazil for 1.175 billion euros. The company has been producing cars in Brazil since 1996 and is currently the largest manufacturer of heavy trucks and passenger cars in Latin America with an annual production of 47,000 vehicles. H?kan Samuelsson, chairman of MAN Group, said that this acquisition has a landmark significance, which will greatly strengthen MAN's market share in the global heavy truck automotive market.
And industry insiders believe that Volkswagen's plan is to let MAN Group, which is controlled by it, come forward to integrate heavy truck business on its behalf. The next step will be to integrate Swedish Scania, which is also controlled by Volkswagen. This is essentially Volkswagen. The car is a key step in the realization of its global strategy for the Lkw-Bund. If the heavy-duty truck business of Volkswagen, MAN Group and Scania of Sweden is successfully merged, the scale of the new global heavy-duty truck auto alliance will exceed Germany's Daimler and Sweden Volvo, becoming the overlord of the world's heavy-duty truck market.
At present, Volkswagen holds approximately 30% of the MAN Group and is the largest single shareholder of the MAN Group. Experts expect that from the perspective of Volkswagen's deployment, it will not fully acquire the MAN Group for the time being, but first look at the performance of MAN's integrated heavy-duty truck business before making plans. In addition, Volkswagen also holds a 37.7% stake in Scania, Sweden, and even holds 68.6% of the company’s voting shares. If the original 13.1% and 3% shares of Scania held by MAN Group are added, the shares of Scania, which are controlled by Volkswagen, will reach 50% and the voting shares will exceed 85%.
Previously, because of the obstruction of Scania's major shareholder and the Swedish Wallenberg family, MAN Group's long-term acquisition plan for Scania ended in failure, so the two companies were deeply separated. For this reason, people in the industry have been skeptical whether Scania will shake hands with the MAN Group. Even more interesting is that MAN Chairman H?kan Samuelsson is also Swedish. This summer, Martin Winterkorn, chairman of Volkswagen, once stated that he will “lead†the cooperation between the Volkswagen heavy-duty vehicle department and the MAN Group and Swedish Scania company, and try to do their best to make the latter two unsolved, such as Volkswagen’s holding of Scania. The company still retained the chairman of the company? Stling's position was to appease the Swedes.
After the MAN Group withdrew from the acquisition, Volkswagen, the largest shareholder holding 18.7% of Scania's shares and 36% of the voting shares at the time, was the chairman of the company’s supervisory board and the old skin of the Porsche family (Ferdinand Piedigin-Ferdinand Pi? The needle thread of ch) was followed by the implementation of the acquisition plan for Scania. Obviously, the main purpose of Volkswagen's relentless acquisition of Scania is to realize its big strategy dream of the global truck heavy truck auto alliance. The real promoters and behind-the-scenes operators of this dream are old skins.
Since Porsche already owns 42.6% of the shares of Volkswagen and the additional 31.5% of Volkswagen’s common stock options, in a sense, controlling Volkswagen means controlling the future of global heavy trucks. Automobile Alliance. In accordance with the original wishful thinking of the old skin, he will integrate two heavy-duty truck manufacturers, the German MAN Group and the Swedish Scania Company, as well as Volkswagen’s heavy-duty truck factory in Brazil and the company’s heavy-duty truck unit into the global Volkswagen Group. Heavy truck car alliance. Now Volkswagen simply let MAN Group first acquire its heavy-duty truck business in Brazil, which will save time and effort for the global heavy truck car alliance.
Volkswagen sells heavy truck business in Brazil for global heavy truck car alliance