Author: Sophie Liu

Compared with the rising stem gate valve, the no-rising stem gate valve of the same size has a smaller volume and an advantage in height. Because the stem thread is in the medium, the medium has a certain adverse effect on the stem and affects the thread life. If there are particles such as residues , It will also affect the opening and closing of the valve

The air release valve has three main functions (three functions).

1 , To discharge the air in the pipe when the pipe is just running with water
2 , When the pipe medium is emptied, the outside air is sucked into the pipe, to ensure the air pressure balance inside and outside the pipe.
3, When the pipeline medium is operating normally, a small amount of air in the medium can be discharged from the pipeline through the air release valve.

Flanged butterfly valves are mainly used in industrial production pipelines. Its function is mainly to cut off the flow of medium in the pipeline or to adjust the size of the medium flow in the pipeline. Flanged butterfly valves are widely used in production pipelines in general industries such as water conservancy engineering, water treatment, petroleum, chemical, urban heating, etc., and can also be used in condensers and cooling water systems of thermal power stations.

Valves are an extremely versatile device that can be found almost anywhere. Valves are active under streets, in houses, in power plants and paper mills, in refineries and in a variety of infrastructure and industrial facilities.

The flow rate and flow rate of the valve mainly depend on the diameter of the valve, and it is also related to the resistance of the valve structure to the medium. At the same time, it has a certain internal connection with various factors such as the valve pressure, temperature and medium concentration.

The valve seat is a detachable part inside the valve. Its main function is to support the valve core to be fully closed or fully closed, and to form a sealing pair. Under normal circumstances, the diameter of the valve seat is the size of the valve. The butterfly valve seat has a wide range of materials, but the commonly used materials include soft-seal EPDM, nitrile rubber (NBR), polytetrafluoroethylene (PTFE), and metal seated alloy materials. kind. Let’s introduce one by one

For stainless steel, it is generally considered to be steel that is not easy to rust, but in fact, stainless steel can also rust. The rust resistance and corrosion resistance of stainless steel are due to the formation of a chromium-rich oxide film (passivation film) on its surface. This kind of rust resistance and corrosion resistance are relative.

The double eccentric sealing butterfly valve adopts an eccentric structure design. The main structure of the valve is composed of valve body, butterfly disc, valve seat, valve stem and transmission mechanism. The valve seat adopts a detachable structure and can be based on the physical and chemical properties of different media. Corresponding corrosion-resistant, light-resistant, and aging-resistant materials are selected, which can be widely used in fluid pipelines such as water supply and drainage, sewage, construction, air conditioning, petroleum, chemicals, food, medicine, textiles, paper making, hydrpower, ships, metallurgy, energy systems, etc. Used as a regulating and intercepting device.

Flange connection is composed of flange, gasket, bolt and nut connection. It is a detachable connection that can be used to connect pipes and valves, pipes and pipes, and pipes and equipment. The flange connection not only has the flexibility of installation and disassembly, but also has reliable sealing performance, high strength, simple structure, low cost, and can be repeatedly disassembled. Because the flange has good comprehensive performance, it is widely used in basic projects such as chemical industry, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, plumbing, fire fighting, electric power, aerospace, shipbuilding and so on.