H44H 2205 duplex stainless steel check valve, 2205 check valve

The 2205 duplex stainless steel flanged check valve is a type of valve used to prevent the backflow of media. Its working principle mainly relies on the pressure difference generated by the flow of the medium to achieve opening and closing.

Here is the principle of the 2205 duplex stainless steel flanged check valve:

1. Structural principle: The 2205 duplex stainless steel flanged check valve is mainly composed of the valve body, valve cover, valve disc, valve stem, sealing ring, etc. The valve body and valve cover are usually made by casting or forging processes, with good strength and corrosion resistance. The valve disc is the main working component of the valve, and its shape and size determine the opening and closing characteristics of the valve. The valve stem is connected to the valve disc and is driven by a handwheel or other driving device to move up and down, achieving the opening and closing of the valve. The sealing ring is located between the valve disc and the valve seat, serving as a seal to prevent medium leakage.

2. Working principle: When the medium flows from the inlet end into the valve, due to the pressure of the medium, the valve disc is subjected to an upward thrust, causing the valve disc to separate from the valve seat, allowing the medium to flow smoothly through the valve to the outlet end. At this time, the force of the medium on the valve disc is greater than the spring's preload force and the reverse force of the medium on the valve disc, and the valve is in an open state.

3. Backflow prevention function: When the medium flows back from the outlet end to the valve, due to the pressure of the medium, the valve disc is subjected to a downward thrust. If the force of the medium on the valve disc is greater than the spring's preload force and the reverse force of the medium on the valve disc, the valve disc will closely adhere to the valve seat, preventing the backflow of the medium. At the same time, the force of the medium on the valve disc causes the spring to compress, storing energy. When the backflow of the medium stops, the spring releases energy, causing the valve disc to return to the open position, allowing the medium to flow normally.

4. Sealing principle: The 2205 duplex stainless steel flanged check valve adopts a metal hard sealing structure, that is, the sealing surface between the valve disc and the valve seat is made of metal material. This sealing method has good sealing performance and wear resistance, suitable for high-pressure, high-temperature, and corrosive medium conditions. The presence of the sealing ring can further improve the sealing performance of the valve, preventing medium leakage.

In summary, the 2205 duplex stainless steel flanged check valve achieves opening and closing through the pressure difference generated by the medium flow, and uses the spring and sealing ring to achieve good backflow prevention and sealing performance. This valve is widely used in industries such as petroleum, chemical, metallurgy, and power, and is an important device for preventing medium backflow.

The 2205 duplex stainless steel check valve is widely used in various industrial fields due to its excellent corrosion resistance and high strength. The specific application scope includes:

Refining industry: It is used to prevent the backflow of media, ensuring the safety and stability of the pipeline system.

Petrochemical and chemical industry: It is suitable for high-pressure, high-temperature, and corrosive medium conditions, with good sealing performance and wear resistance.

Petroleum and natural gas industry: It is used for pipeline transportation, preventing the backflow of media, and improving system safety.

Pulp and paper industry: It is used to handle corrosive media, increasing the service life of equipment.

Fertilizer industry: In the inlet and outlet single-direction valves of urea plants and the high-pressure stop valves of the main process pipelines, duplex stainless steel is used instead of 316L (urea grade) steel, with significant improvements in wear resistance, corrosion resistance and strength.

Food and pharmaceutical industry: It is used to prevent the backflow of media, ensuring the safety and hygiene of the production process.

Packing of Standard Packing: 

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 470 gallon liquid totes Special package is available on request. E FORUs’  is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition