Views:10 Author:Site Editor Publish Time: 2021-01-27 Origin:Site
The plate heat exchanger gasket is a key part of the heat exchanger. Due to the continuous expansion of the application field of plate heat exchangers, different media and processes have different requirements for temperature resistance, pressure resistance and corrosion resistance.
The operating temperature of the plate heat exchanger is actually the temperature that the gasket can withstand. It is obviously impossible to use a "universal" gasket to adapt to all situations. Instead, gaskets of different materials should be used for different situations, and the material of the gasket should also have heat resistance, elasticity and corrosion resistance.
The commonly used gasket cross-sectional shape is a six-sided row. Plate heat exchanger sealing gaskets can be divided into 3 types according to the installation method on the heat exchange plates.
(1) Direct paste type: After applying sealant on the sealing gasket, it is directly glued to the installation groove of the heat exchange plate.
This type of gasket has a simple structure and is the easiest to process, but it is relatively troublesome to install and disassemble, and is not suitable for occasions where the plate heat exchanger is frequently disassembled.
(2) Rubber nail inlay type: the heat exchange plate is designed with assembly holes, and the rubber nails are designed on the side of the sealing gasket. After the sealing gasket is placed in the installation groove, the rubber nails are inlaid in the assembly hole.
(3) Snap-fitting type: It is to design the buckle nail on the side of the sealing gasket, and use the buckle nail to buckle the sealing gasket on the heat exchange plate.
Inlaid and snap-fit gaskets are complex in structure and cumbersome to process, but they are relatively easy to install and disassemble, and can be used for plate heat exchangers that require frequent disassembly.
Plate heat exchanger gaskets should be replaced in time if they leak, break, or age during use.
The sequence of replacing the gasket is as follows:
① Remove the used gasket. Note that when disassembling, there must be no scratches in the gasket groove.
② Use acetone, methyl ethyl ketone or other ketone solvents to thoroughly remove the residual glue in the gasket groove.
③ Clean the gasket groove and gasket with a clean cloth or cotton yarn.
④ For adhesive gaskets, apply the adhesive evenly in the gasket groove.
⑤ Stick a clean new gasket on the board.
⑥ The plate with the gasket should be placed ina flat, cool and ventilated placebefore it can be installed and used after it has dried naturally.