What are the applicable temperature and pressure ranges for plate heat exchangers?

There is a post on the Haichuan heat exchange area regarding the selection of heat exchangers; you need to get in touch with the poster, as he might be able to provide you with information on plate heat exchangers.

The pressure is below 16 Mpa, and the temperature is around 180 degrees; long-term exposure to high temperature and pressure affects the service life of the heat exchanger

See what environment you’re using it in? In what terms of craftsmanship?

1. Fully welded plate heat exchangers do not use any non-metallic sealing materials, thus offering high temperature and pressure resistance. It can be used in extreme operating conditions of 300°C operating temperature and 3.0 Mpa pressure. 2. The normal operating temperature of a detachable plate heat exchanger is below 150°C (depending on the properties of the sealing materials), under conditions of a pressure of less than 1.6 Mpa.

It features high heat exchange efficiency, low flow resistance losses, a compact structure, sensitive temperature control, great operational flexibility, easy installation and disassembly, and a long service life; it is currently the most advanced high-efficiency energy-saving heat exchange equipment available in China. Plate heat exchangers can handle a very wide range of materials – from ordinary industrial water to highly viscous liquids; from food and pharmaceutical fluids with high hygiene requirements to acidic and alkaline liquids that are corrosive; from liquid materials containing particles and powders to suspended liquids with a small amount of fibers. Plate heat exchangers can be used for processing all of these types of materials. It can be used for heating, cooling, evaporation, condensation, sterilization, heat recovery, and other applications. Such as internal circulation in the cooled generator set and rectifier ； Used as mechanical lubricant in metallurgical mines and similar applications ； Sterilization and disinfection of hydraulic stations, egg liquid, and edible oil; sterilization of beer and wine ； Used for waste heat recovery in the light textile industry and papermaking sector ； Collect condensate water for centralized heating ； Convert steam heating to water heating ； Intermediate heat exchange in the boiler deaeration system, etc. It is currently widely used in industrial sectors such as metallurgy, mining, petroleum, chemicals, power generation, pharmaceuticals, food processing, chemical fibers, light textiles, papermaking, shipbuilding, and central heating. II. Structural principle of plate heat exchangers: A detachable plate heat exchanger is composed of numerous corrugated thin plates that are arranged at regular intervals; these plates are sealed around the edges using gaskets, and they are pressed together by a frame and compression screws. The corner holes in the plates and gaskets serve as distribution and collection channels for the fluid, while also allowing the cold and hot fluids to be separated properly, so that they flow in the channels on either side of each plate, thereby enabling heat exchange through the plates. III. Design features of plate heat exchangers: 1. High efficiency and energy savings: Its heat transfer coefficient ranges from 3000 to 4500 kcal/m2· ； °C&#8226 ； h has a thermal efficiency 3–5 times higher than that of shell-and-tube heat exchangers. 2. Compact structure: The plates of a plate heat exchanger are arranged closely together; compared to other types of heat exchangers, it occupies less floor space and volume. For the same heat transfer capacity, a plate heat exchanger requires only 1/5 of the space needed by a shell-and-tube heat exchanger. 3. Easy to clean and assemble: Plate heat exchangers use clamping bolts to hold the plate sheets in place, which makes them easy to disassemble and clean at any time. Additionally, due to the smooth surface of the plates, turbulence is high, making scaling less likely to occur. 4. Long service life: Plate heat exchangers are made from stainless steel or titanium alloy plates, allowing them to resist various corrosive substances. The gaskets can be replaced easily, and the units can be assembled, disassembled, and maintained conveniently. 5. Strong adaptability: The plates of plate heat exchangers are independent components, allowing the flow paths to be increased or decreased as needed, with a variety of configurations available ； It can be applied to various different process requirements. 6. No leakage of fluid: The seal grooves of plate heat exchangers are equipped with fluid drainage channels, allowing for the handling of various fluids

2.5MP, 180 degrees – it refers to the detachable version.

It can use replaceable plates; the pressure is below 2.5 Mpa and the temperature is around 210 degrees, but it cannot be used for long periods under high temperature and high pressure conditions.

There was a mistaken assumption, namely that the temperature resistance of modular plate heat exchangers depends on the temperature of the gaskets. Not to mention, the corrosion of the plates by the medium should be taken into account. The design temperature depends on a comprehensive consideration of both the gasket and the plate, so when determining the operating temperature range, it is essential to take both factors into account simultaneously.

Under normal conditions, thanks to the modified design of the sealing strip in the plate exchanger, it can withstand a pressure of 1.6 MPa; the maximum temperature it can handle is 150 degrees. It is detachable. However, its service life also depends on the operating conditions – stable pressure leads to a longer service life, while large pressure fluctuations have an impact on its lifespan as well.

Putting aside the corrosion issues related to the sheet material, the operating temperature is determined by the gasket material: NBR at 110 degrees, EPDM at 150 degrees, Viton at 180 degrees, neoprene at 100 degrees, and silicone at 230 degrees