Plate Heat exchanger manufacturer, industry solution expert

Plate heat exchanger gasket repair process and requirements_

by:DIGUANG     2021-04-24
Plate heat exchanger gasket repair process and requirements

2020-03-24 10:13
If the gasket of 534 plate heat exchanger is leaking, broken, aging, invalid, damaged, etc. during use, it must be replaced and repaired in time to avoid affecting the heat exchange effect of the plate heat exchanger. Next, the editor of Diguang Heat Transfer will tell you about the repair process and requirements of plate heat exchanger gaskets. Interested friends are welcome to read the following. 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. 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. Commonly used gasket types are natural rubber, neoprene, nitrile rubber, EPDM, silicone rubber, fluororubber, asbestos fiberboard, etc. The replacement of the gasket of the plate heat exchanger should be carried out in the following order: Remove the waste gasket. When disassembling, make sure that there are no scratches in the gasket groove. Use acetone, methyl ethyl ketone or other ketone solvents to remove the residual glue in the gasket groove. Wipe the gasket groove and gasket with a clean cloth or cotton yarn. Spread the adhesive evenly in the gasket groove. Attach a clean new gasket to the board. The plate with the gasket should be placed in a flat, cool, and ventilated place to dry naturally for 4 hours before installation and use. Plate heat exchanger gasket repair: The maintenance cycle of plate heat exchanger is generally 2 years. For stainless steel plates, steel wires must not be used to brush the stainless steel plates. The cleaning water must not contain salt, sulfur and other ingredients, and the CL- content of the water is less than 20ppm. Plate assembly requirements: before plate assembly, push the movable pressure plate to one end, clean the inner side of the fixed pressure plate and the movable pressure plate and the nozzle, first add the nozzle rubber sleeve and the rubber sleeve support ring. When installing the plates, according to the process combination, put the side without the rubber pad to the fixed pressure plate, and then hang all the plates in the order of A-B-A-B. After all the plates are hung, the movable pressing plate is pushed together, the 6 long bolts are installed, and the bolts are tightened. During this process, the movable platen should be kept moving in parallel. After the bolts are tightened, compare the plate stack length 'A' measured at the adjacent bolts with the value of 'A' before disassembly, and compact it in stages, not to be smaller than the specified size of the plate heat exchanger to avoid compression. Too loose or too tight. Water pressure test: Slowly increase the pressure to the design test pressure and then maintain the pressure for 30 minutes, during which there is no abnormal sound, no abnormal deformation, no leakage, and no pressure drop as qualified. If it is a stainless steel plate, the content of chloride ions in the pressure test water must be controlled, and the ambient temperature should not be lower than 20°C. The above is about the repair process and requirements of the plate heat exchanger gasket, I hope it will be helpful to you. If you want to know more about the gasket model, installation, use, and maintenance of the plate heat exchanger, please go to the official website of Diguang Heat Transfer for detailed consultation.
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