China double plate check valve: double layer protection, safe and reliable

1. Structure and principle of double-plate check valve

1. Structural design

The double-plate check valve adopts a double-layer protection structure, which is mainly composed of valve body, upper and lower valve plates, springs, guide devices and other components. The valve body is made of high-strength and wear-resistant materials to ensure the overall strength and durability of the valve. The upper and lower valve plates are symmetrically distributed and connected to the valve body through guide devices to form two independent sealing surfaces. The spring is used to provide the restoring force of the valve plate closure to ensure that the valve can be automatically closed when there is no medium pressure.

2. Working principle

The working principle of the double-plate check valve is based on the pressure difference of the medium flow. When the medium flows forward, the pressure pushes the upper and lower valve plates to open, and the medium passes smoothly; when the medium flows in the reverse direction, the valve plate is subjected to reverse pressure, and the spring force between the valve plates makes it tightly closed, thereby preventing the medium from flowing back. This double-layer protection structure makes the double-plate check valve have excellent anti-backflow performance.

2. Advantages and characteristics of double-plate check valve

1. Highly safe and reliable

The double-plate check valve adopts a double-layer protection structure, which has higher safety performance than the traditional single-plate check valve. Under extreme working conditions, even if one layer of the valve plate fails, the other layer of the valve plate can still play a protective role to ensure the safe operation of the pipeline system.

2. Good sealing performance

The sealing surface of the double-plate check valve adopts a symmetrical design up and down, so that the valve can achieve two-way sealing when closed. At the same time, the close fit between the valve plate and the valve seat effectively reduces the possibility of medium leakage.

3. Wear resistance and long life

The valve plate and valve seat of the double-plate check valve are made of high-strength and wear-resistant materials, which can work stably for a long time under harsh working conditions. At the same time, the double-layer structure design greatly reduces the wear between the valve plate and the valve seat during the opening and closing process of the valve, extending the service life of the valve.

4. Easy installation

The double-plate check valve has a compact structure, light weight and easy installation. The valve is flange-connected, which is convenient for quick docking with other equipment in the pipeline system.

5. Wide range of applications

Double-plate check valves are suitable for all kinds of liquid and gaseous media, and are widely used in petroleum, chemical, metallurgy, electric power, light industry and other industries.

III. Application of double-plate check valves in modern industry

1. Prevent backflow in pump room

In the pump room, the double-plate check valve can effectively prevent the backflow of media, avoid backflow in the pump room, and ensure the normal operation of the pump.

2. Protect equipment safety

In some equipment with strict requirements on the flow direction of the medium, the double-plate check valve can prevent the reverse medium from damaging the equipment and ensure the safety of the equipment.

3. Improve system stability

In complex and changeable industrial pipeline systems, double-plate check valves can effectively prevent the backflow of media and improve system stability.

Double-plate check valves check-valve, with their unique double-layer protection structure, provide safe and reliable protection means for modern industrial pipeline systems. In industrial production, the rational selection of double-plate check valves can effectively prevent the backflow of media, ensure equipment safety, and improve system stability. As industrial production continues to increase its safety requirements for pipeline systems, double-plate check valves will play a more important role in future industrial development.