A sandwich type swing check valve is a specialized valve used in piping systems to prevent backflow and ensure the smooth flow of fluid. It is called a sandwich valve because it is designed to fit between two flanges, with one flange serving as the inlet and the other as the outlet. This type of valve is also known as a dual plate check valve or a double-door check valve.

The sandwich type swing check valve consists of a body with two hinged plates or doors that swing open and closed. The plates are held in place by a central hinge, and when fluid flows through the valve, they swing open to allow the fluid to pass. When the flow of fluid stops, the plates swing back to their original position, closing the valve and preventing backflow.

One of the significant advantages of the sandwich type swing check valve is its compact design. The valve is relatively small in size compared to other types of check valves, making it ideal for applications where space is limited. It is also lightweight, making it easy to install and remove from the pipeline.

Another advantage of the sandwich type swing check valve is its low-pressure drop. The valve design allows for a smooth flow of fluid through the valve, resulting in minimal pressure loss. This is particularly important in applications where maintaining high flow rates is critical.

The sandwich type swing check valve is available in various sizes and configurations to suit different piping systems' requirements. They are made from high-quality materials such as cast iron, ductile iron, carbon steel, and stainless steel, and are designed to withstand high-pressure and temperature.

In conclusion, the sandwich type swing check valve is a specialized valve used in piping systems to prevent backflow and ensure the smooth flow of fluid. It is lightweight, compact, and has a low-pressure drop, making it ideal for applications where space is limited, and maintaining high flow rates is critical. They are available in various sizes and configurations to suit different piping systems' requirements and are made from high-quality materials that can withstand high pressure and temperature.

Get more knowledge about What to Look for When Choosing an hot tapping machine Manufacturer please refer to aoguang sandwich valve：https://www.pipelinehottapping.com