Industrial dual plate check valves, also known as double plate check valves or twin plate check valves, are types of check valves that feature two half-circle shaped plates (or discs) that swing on a hinge or pivot within the valve body. Here are some key features and aspects of industrial dual plate check valves:

1. Design: The dual plate design consists of two semicircular plates that are mounted on a central hinge pin or shaft within the valve body. The plates are typically lightweight and are designed to swing open freely in response to forward flow of fluid, allowing it to pass through the valve. When the flow stops or reverses, the plates swing closed under gravity and fluid pressure, preventing backflow.

2. Operation: Dual plate check valves operate on the principle of swing check valves but offer improved efficiency and reduced pressure drop due to their streamlined design. They open in response to forward flow and close automatically to prevent backflow, providing reliable and efficient flow control.

3. Advantages: Industrial dual plate check valves offer several advantages, including compact size, reduced weight, low pressure drop, quick response to changes in flow direction, and suitability for high-pressure applications. Their compact design makes them ideal for use in tight spaces and piping systems with limited clearance.

4. Materials: Dual plate check valves are available in a variety of materials to suit different applications and environmental conditions. Common materials include carbon steel, stainless steel, ductile iron, and various alloys. The choice of material depends on factors such as the type of fluid, temperature, pressure, and corrosion resistance requirements.

5. Applications: Dual plate check valves are used in a wide range of industrial applications where backflow prevention is essential. They are commonly found in water and wastewater treatment plants, oil and gas production facilities, chemical processing plants, power generation facilities, HVAC systems, and more.

6. Sizes and Configurations: Industrial dual plate check valves are available in various sizes and configurations to accommodate different pipe sizes, flow rates, and pressure ratings. They may be available in wafer-style, lug-style, or flanged configurations, and can be customized to meet specific project requirements.

7. Maintenance: Like any other check valve, industrial dual plate check valves require periodic inspection and maintenance to ensure proper operation. This may include cleaning, lubrication, and replacement of worn or damaged components.

Overall, industrial dual plate check valves are reliable and efficient flow control devices that play a crucial role in maintaining the integrity and efficiency of piping systems in various industrial applications. Choosing the right type of valve and ensuring proper installation and maintenance are essential for optimal performance and longevity.