Plate heat exchanger plates are stamped by high-precision molds at one time. The same batch of plates have the same precision, and there are even metal contact points between the plates, ensuring that the plate heat exchanger operates under normal working pressure and can withstand a certain pressure shock.

    In the plate heat exchanger, the difference of the heat exchange medium will be corrosive to the corresponding material plate. Therefore, it is very important to select the appropriate plate heat exchanger plate material according to different heat exchange media.

    The following Propellent introduces the plate material of the plate heat exchanger in detail:
    1. Stainless steel 304, 316, 316L, etc.: stainless steel plates have good corrosion resistance and high cost performance. It is suitable for heat exchange media with low chloride ion content such as purified water, river water, edible oil and mineral oil. Most of the plate heat exchanger plates are made of stainless steel.

    2. Titanium plate: The plate heat exchanger uses unalloyed titanium, which is lighter in weight and good in quality. It can naturally generate a passivation protective film, which will repair itself when damaged, so the corrosion resistance is better than stainless steel, but the price higher. It is suitable for heat exchange media with high chloride ion content such as sea water, salt water, and salinity.

    3. Titanium-palladium alloy: The plate heat exchanger uses unalloyed titanium added with palladium (0.12%~0.25%), which improves the corrosion resistance of titanium in acid liquids. It is suitable for hydrochloric acid, nitric acid, sulfuric acid and other media, and is used under some specific working conditions.

    4. SMO254: It is an austenitic stainless steel. Due to its high content of molybdenum, it has extremely high resistance to chloride pitting and crevice corrosion. It is suitable for 316 type dilute sulfuric acid, sparse salt aqueous solution, inorganic aqueous solution and other media. It is a kind of cost-effective stainless steel, which is widely used in the fields of chemical industry, desulfurization and environmental protection.

    5. Nickel: The plate heat exchanger uses a pure nickel plate containing more than 99% nickel. It is mainly used for high-concentration, high-temperature caustic solutions (NaOH, KOH, etc.). It has good corrosion resistance to alkaline and neutral solution media of carbonates, nitrates, oxides and acetates. However, it is very sensitive to crevice corrosion caused by chlorides such as brackish water.