The appearance of a ball valve was after the Second World War. Although the invention of a ball valve dates back to the early 20th century, this structural patent failed to complete its commercialization steps due to limitations in the materials industry and the mechanical processing industry. DuPont in the United States invented a high polymer material polytetrafluoroethylene (PTFE) plastic until 1943. This kind of material has advantages of sufficient tensile and compressive strength,...

The definition, characteristics and classification of butterfly valves A butterfly valve is a rotary valve which is open or closed by rotating a disk-shaped, circular or rectangular closure member for about 90 or 90 degrees. The butterfly valve is an old valve. It was only used for adjustment in the early stage due to its poor sealing performance. For example, the flue valve is an adjustment butterfly valve. With the advent of elastomeric sealing materials such as synthetic rubber and the in-depth...

Topper Valve is going to participate in the 11th Valve World Conference 2018 in Germany, and our booth number is 3D01. You are very welcome to come and negotiate valve business with us. Exhibition information Exhibition date: November 27-29, 2018 Venue: Messe Düsseldorf Exhibition Center, Germany Exhibition cycle: Every two years Organizer: Beijing Linhui International Exhibition Co., Ltd. The overview of the exhibition The Dusseldorf International Valve World Expo is the only professional...

A thread valve is the valve with the thread and can be classified into the internal thread valve and the external thread valve. This kind of valve is connected to the pipeline with the threaded connection. The valve, generally, has the small diameter and is used for engineering projects under normal pressures and low pressures. At the same time, under high pressures, the thread valve is required to be operated with the welded connection or the flange connection. Common types of thread valves include...

A check valve is divided into the swing check valve (rotating around its center of gravity) and the lift check valve (moving along the axis). The check valve is one kind of the automatic valves, mainly used for preventing the black flow of media, the leakage of the media from containers and the inversion of pumps and drive motors. Furthermore, the check valve can be used for the pipeline supporting assistant systems with the pressure higher than the system pressure. In order to ensure that the valve...

Event: 2017 China (Zhengzhou) International Water Equipment and Technology Exposition Venue: Central China International Expo Center (No.210, Zheng Bian Road, Zhengzhou City, Henan Province) Date: 2017.07.18-2017.07.20 Organizer Water Engineering Association Co-organizer Hydraulic Engineering Society of Henan Province Pump Industry Association of Henan Province Contractor Beijing Zhiwei International Exhibition Co., Ltd. Exhibits Irrigation & Drainage: pumps, valves, pipes, etc. Water Saving:...

Pneumatic ball valves The pneumatic ball valve consists of the ball valve and the pneumatic actuator. It generally needs to be used in conjunction with accessories including the magnetic valve, air treatment FRL, limit switch, and positioner so as to be controlled remotely and locally as well as to be opened and closed in the control room. It improves safety, largely saves the cost of human resources and time, and makes manual control on site, above the ground and in dangerous palces not needed...

Valve products have been widely applied in petroleum, chemical engineering, nuclear power, metallurgy, electric power, hydraulic power, large coal chemical industry and other industries. Total quantity of valve products is constantly growing. Valve technology is developing and application of valve is also expanding continuously. Valve standards relative to valve products are showing their importance in at present. Usage of valve standards in China Using international standards and foreign advanced...

Pneumatic control valve plays a vital role in automatic control system of modern factory. The competition is quite intense in pneumatic valve industry in China. The future development trend of pneumatic control vale is emphasis concerned by enterprises and customers. At present, pneumatic control valve manufacturers should insist on innovation, carrying out structural adjustment on products, modifying conventional products and entering into the field of high-end valve products. It requires that...

Event: Valve World Expo 2016 (10th Binennial Valve World Conference and Exhibition) Topper Valve Booth No.: 3A27 Date: November 29-December 1, 2016 Venue: Messe Düsseldorf, Stockumer Kirchstrasse 61 Düsseldorf, Nordrhein-Westfalen 40474 Germany Website: http://www.valveworldexpo.com/ Topper Valve will attend Valve World Expo 2016 (10th Binennial Valve World Conference and Exhibition) which will be held from November 29-December 1, 2016, at the fairgrounds in Düsseldorf,...

China is a valve manufacturing power. Promoted by industrialization, urbanization, reformation and globalization, Chinese valve industry still has a wide prospect. In the future, high-end, localization and modernization will be the primary development directions of Chinese valve industry. At present, China has already become an international manufacturing plant and it is also a valve manufacturing power. In the new century, Chinese valve industry makes a great progress. The whole technical level...

Various problems are existing in China valve industry. The main reason is that after Reform and Opening Up, the market expanded in haste while original state-owned valve corporations were closed or transferred in succession, having low mechanical industrial level. So, township enterprises or private enterprises were quickly developed in succession, with low starting point, weak technical force and simple equipment. Most of products were manufactured based on imitation. Adding with disorder market,...