WAFER TYPE DOUBLE DISE CHECK VALVE Wafer check valve is also known as reverse flow valve, check valve, back pressure valve and one-way valve. This type of valve is automatically opened and closed by the force generated by the flow of the medium itself in the pipeline. The valve used to prevent the backflow of the medium belongs to an automatic valve. Wafer Type Double Dise Check Valve,Double Disc Check Valve,Double Disc Wafer Check Valve,Wafer Type Butterfly Valve Inner Mongolia Overseas.Trade co.,LTD , https://www.flangevalvejoint.com
Its main function is to only allow the medium to flow in one direction and prevent the flow in the opposite direction.
, Prevent the reverse rotation of the pump and the drive motor, and the discharge of the container medium. Check Valves may also be used on lines supplying auxiliary systems where pressure may rise above system pressure. Check valves are used in piping systems,
The check valve is a valve that automatically opens and closes the valve flap depending on the flow of the medium itself, allowing the medium to flow in one direction, and plays an important role in protecting the pipeline machinery and equipment from water hammer damage. Usually, this kind of valve works automatically. Under the action of fluid pressure flowing in one direction, the valve flap opens; when the fluid flows in the opposite direction, the fluid pressure and the self-coincident valve flap of the valve flap act on the valve seat, thereby cutting off the flow. The working characteristics of the check valve are that the load changes greatly, the opening and closing frequency is small, and once it is put into the closed or open state, the applicable period is very long, and it does not require the movement of moving parts. But once there is a "switching" requirement, it must be flexible,
Wafer check valve, the valve body is cast iron or cast steel, and the valve disc can be made of metal, depending on the performance requirements. The disc can be of all-metal construction, in the form of a rubber pad or rubber ring inlaid on the disc holder, or with a synthetic overlay.
Choose different materials, can be applied to water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea and other media.
Nominal pressure or pressure level: PN1.0-16.0MPa,
Nominal diameter or diameter: DN15~900,
Connection method: flange clip,
Applicable temperature: -196℃~540℃
Body Material: WCB, CAST IRON CF8(304) CF8M(316) CF3M(316L).
Disc Material: WCB, CAST IRON CF8(304) CF8M(316) CF3M(316L).
Iron ore prices are expected to stabilize next month
It is a hot topic in the industry to see when the price of iron ore that has been soaring will be able to brake. Yesterday, Lange Steel analysts said that it is expected that the price of the mine will stabilize in March due to insufficient growth momentum. Previously, due to the strong expectations of imported iron ore prices continue to rise, many domestic miners and traders are waiting for a large amount of stocks to be raised. Therefore, the forecast of the stabilization of the mine price also warns that the future market risks of mining traders will increase. According to Sun Ming, a researcher at the Lange Steel Information Research Center, the price of the mine will stabilize in March. The main reason is that the market prices of steel products (5026, 14.00, 0.28%) have been converging, and the driving force to support the continued rise of the iron ore market is insufficient. Data show that China imported 68.97 million tons of iron ore in January, an increase of 47.9%. In this regard, Lange Steel analyst Zhang Lin said that overall, the extreme weather in Australia and Brazil and the continued serious inflation in the country are the main reasons driving the surge in international iron ore prices. It is also because the market is generally bullish, and traders are showing signs of rising prices. China's 19 ports iron ore stocks increased from 80.9 million tons at the beginning of January to 88.46 million tons, an increase of nearly 8 million tons. “If the price of minerals stabilizes, it will definitely cause traders to face great market risks,†Zhang Lin said. “The original ore market will have a wave of steel mills’ procurement peaks, but the domestic steel market is now emerging. Adjusting the situation, the domestic iron ore market has a strong wait-and-see atmosphere, and the transaction volume has dropped sharply. In fact, since the 15th of this month, steel prices have begun to stabilize or even call back 20 to 30 yuan, which will inhibit the price of minerals. An industry insider also pointed out that domestic steel prices and mineral prices have been pushing each other up. And now steel prices begin to decline, which will have a great impact on the price of minerals. “The biggest risk of steel prices is that the market does not accept existing prices.â€