It is no stranger to mention 12R22.5 tires to truck drivers. This type of tire is already the most popular tire specification in the current freight logistics market. As the leader of the global tire industry, Michelin will naturally have a "heavy fist" product layout for this market. After a thorough understanding of customer needs, coupled with Michelin's advanced R&D and production technology, on August 4, 2014, the Michelin Card Passenger Car Tire product line launched 12R22.5 X-Multi Z Tough in China, mainly for regional use. Sex transport industry customers.
This product has a 20% increase in mileage compared to the previous generation product, and tire life is longer. In addition, Michelin's safety also allows the team to have more confidence: the toe is strengthened and the bearing capacity is increased; the stone trapping is prevented and the accidents are reduced; and for the requirements of energy saving and environmental protection, the new product is more outstanding performance, achieving the maximum fuel saving of 1%.
Currently, 12R22.5 tire products are widely used, and Michelin's new product tires are launched, hoping to benefit customers in these industries, giving users lower tire use costs and higher security.
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.
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