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
This morning, in a brawl, Yantai North Auto Parts Trading Center broke ground. Yantai Municipal Standing Committee, Secretary of Politics and Law Committee Min Haotian, Deputy Director of Municipal People’s Congress, Qiuzan Qiang, Yantai City and Fushan District, and heads of relevant departments of the Development Zone Nearly 1,000 owners of the North Auto Parts Co., Ltd. participated in the opening ceremony of the North Auto Parts Trading Center.
Yantai North Auto Parts Trading Center is the only large-scale specialized market established with the approval of governments at all levels to operate automobiles and auto parts. At the same time, supporting projects include car maintenance, maintenance, building materials, Wujinjiaodian, chemical, food, etc. Daily necessities, miscellaneous products, catering, hotels, offices, commercial and residential. The market covers an area of ​​80,000 square meters and the building area is 128,000 square meters. The total investment is nearly 300 million yuan. A number of investment companies, such as Hong Kong and Hainan, and Yantai Development Zone New Century Industrial & Trading Technology Co., Ltd. will jointly invest in construction, joint operation and management, and will also be combined with the national, provincial, and municipal auto industry associations to deal with auto parts in Guangzhou and Wenzhou. Market joint investment, the market will be built into the auto parts trading market in northern China with the largest scale, the highest grade, the most complete variety, the greatest potential for appreciation, and the highest return on investment. After the market is completed, it will be the distribution center, exhibition and ordering base and research and development base for auto and auto parts in northern China. There will be regular international and domestic automotive and auto parts fairs and product orders.
The market will be completed by the end of this year the main project, delivered in August next year. The market has more than 1,500 stores and more than 300 small apartments that can accommodate 10,000 people. The daily traffic is expected to reach 50,000 people. Domestic and foreign well-known automobile brands, auto parts manufacturers and thousands of auto parts distributors will enter the market. The annual turnover plan will exceed 2 billion yuan and the profits and taxes will exceed 100 million yuan. Its completion not only fills the blank of the professional market for large auto parts in Yantai, but also is the largest and most professional automotive and auto parts market in northern China.
The market specializes in the professional management team of the auto parts market to participate in the management. All the problems of the business household can be completed in one window. The market implements uniform investment promotion, unified business area division, unified handling of various documents, unified payment of various taxes and fees, unified advertising, unified service standards, unified safety management, unified housing rental, unified health management, and unified preferential policies. Create an international-flowing business environment for the industry and create the highest investment return of Yantai.
Yantai will be built into the largest auto parts distribution center in northern China