Flat plate heat exchanger is a type of heat exchanger that uses metal plates to transfer heat between two fluids. This has a major advantage over a conventional heat exchanger in that the fluids are exposed to a much larger surface area because the fluids spread out over the plates. This facilitates the transfer of heat, and greatly increases the speed of the temperature change. Plate heat exchangers are now common and very small brazed versions are used in the hot-water sections of millions of combination boilers. The high heat transfer efficiency for such a small physical size has increased the domestic hot water (DHW) flow rate of combination boilers. The small plate heat exchanger has made a great impact in domestic heating and hot-water. Larger commercial versions use gaskets between the plates.

The sealing gasket are pasted on the corrugated plates.They are designed into 2-pass  seal structure with signal holes.When the media leaks from the 1st sealing,if comes out from the signal hole.You will find out problems earlier and the deal with them.No media mixing up occures, and it do not let the medias mixed.The seal gaskets are made by different kinds of rubber adapted to different medias and operating temperature.