Plate heat exchanger--the maintenance of elastic sealing gasket Chapter 2
In principle, the fixation of sealing elements is divided into adhesive fixation and non-adhesive fixation. The shape of the sealing heat exchanger gasket should be consistent with that of the sealing site of the plate heat exchanger. It must be noted that the adhesive fixation method will not affect the sealing function.
1. Non-adhesive plate heat exchanger gasket sealing
(1)Align: put the sealing ring in place
(2) Put in: make the sealing ring exactly get into the seal groove
(3) Compress: the seal groove has a groove shape structure with gradually decreasing cross section, so that the sealing ring can be rightly positioned.
2. Adhesive plate heat exchanger gasket sealing
According to the use purpose of the sealing gasket and the sealing quality requirements, harmonic sealant and non-harmonic sealant produced by different manufacturers can be optional. Before adhesion, steam flow should be used to thoroughly clean up the residual adhesives and residual gasket on the adhesive surface. For adhesion with harmonic sealant, the residual adhesives and residual gasket on junction surface of the plate heat exchanger must be burned out with fire. For large-batch adhesion, liquid nitrogen pool for freezing sealing elements and heating furnace for drying the plate heat exchanger with sealing gasket should be prepared, and the heating temperature should reach 160 ℃. If conditions permit, chemical cleaning should be done on the heat exchanger to ensure complete removal of residual adhesives on junction surface of the plate heat exchanger. Whether the sealing gasket is installed properly can be learnt through the nest peep hole of the plate heat exchanger.
