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Three common installation methods of plate heat exchanger gasket
Release time:
2022-06-23
In principle, the fixing of the sealing gasket of plate heat exchanger is divided into adhesive and non-adhesive types. The shape of the sealing gasket of plate heat exchanger should be consistent with the shape of the sealing part of the plate heat exchanger. It should be pointed out that the adhesive fixing method will not have any side effect on the sealing function.
Although we know little about the packing of plate heat exchanger, we may know little about its installation method. The key role of the sealing gasket of plate heat exchanger is that, let's understand the three common installation methods of the sealing gasket of lower plate heat exchanger!
The sealing gasket of plate heat exchanger of plate heat exchanger can be divided into three types according to the installation method.
1) Direct pasting means that after applying sealant on the gasket, it is directly pasted in the installation groove of the heat exchange plate.
2) Glue nail inlay refers to the installation hole set on the heat exchange plate, the glue nail set on the edge of the gasket, and the glue nail inserted into the installation hole after the gasket is put into the installation slot.
3) Snap pin is set at the end of the gasket and used to snap the gasket onto the heat exchange plate.
Compared with the above three methods, the sealing gasket of plate heat exchanger has simple structure and easy processing, but it is difficult to install and disassemble. The structure of plug-in and snap ring gaskets is complex and the processing is troublesome, but the installation and disassembly are relatively easy. The sealing gasket of plate heat exchanger can be divided into symmetrical type and asymmetrical type according to the sectional shape of the product. The symmetrical type is generally applicable to the plate with diagonal flow. The upper and lower sealing surfaces are flat, symmetrical along the water plane, and can be installed in both directions. The asymmetrical floor is flat, and the upper sealing surface can be flat, curved, inclined, etc.
The sealing gasket of plate heat exchanger has different forms in different applications. For example, if users want to obtain higher heat exchange efficiency, the gasket generally used is in the form of diagonal flow; In order to save costs, let's look at the specific manifestations of the sealing gasket of the plate heat exchanger, such as the use of one-way flow. The plate heat exchanger plate is divided into unilateral flow and diagonal flow according to the flow form of heat exchange medium. Correspondingly, the plate heat exchanger gasket is divided into unilateral flow and diagonal flow according to the flow form of heat exchange medium.
The one-way flow of the plate heat exchanger gasket means that the heat exchange medium flowing from the square hole on the right side of the heat exchange plate flows out from the square hole on the right side. Similarly, the heat exchange medium flowing from the square hole on the left side flows out from the square hole on the left side. Diagonal flow means that the heat exchange fluid flows from the right corner hole and flows out of the left corner hole, or the fluid flowing from the left corner hole flows out of the right corner hole and flows diagonally. In terms of heat transfer efficiency, the convection mode is better than the unilateral flow mode, but because the cost of adopting the unilateral flow mode is relatively low, the unilateral flow mode is generally adopted when the heat transfer efficiency can be met.
The aging of the elastic gasket is related to the pressure and temperature. If the gasket is not elastic, the heat exchanger will drop liquid. In order to solve the leakage caused by the aging of the sealing gasket of the plate heat exchanger, some products tighten the clamping bolts of the combined plate heat exchanger again, adjust the clamping force of the elastic gasket between the heat exchangers, and allow the adjustment of the sealing performance of the heat exchanger that solves the leakage problem. The nameplate of the heat exchanger with this function is generally endowed with allowable clamping large and small stresses. When installing new heat exchanger plates, please connect and fix them under small allowable stress. According to the number of plates of each heat exchanger, the fastening force of the heat exchanger can be adjusted once or several times. The nut can be screwed in for 3 mm during the first tightening, and the stress of the plate can be adjusted at any time during the tightening process. In addition, only for heat exchangers without working pressure, the tightening force can be adjusted down at room temperature to prevent liquid dripping. For plate heat exchangers with no stress adjustment range shown on the nameplate, the stress value is generally shown on the part drawing. When tightening this type of plate heat exchanger, because it is related to the assembly quality and deformation of the plate heat exchanger, the tightening torque shall not be lower than the value specified in the drawing. When the tightening torque reaches the specified value, the rubber pad can be replaced in a planned way. For plate heat exchangers used for important production equipment and corrosive media, it is recommended to use a spare seal. When the warehouse temperature is 18, the plate heat exchanger seal can be stored for about 5 years with transparent plastic packaging.
In principle, the fixing of the sealing gasket of plate heat exchanger is divided into adhesive and non-adhesive types. The shape of the sealing gasket of plate heat exchanger should be consistent with the shape of the sealing part of the plate heat exchanger. It should be pointed out that the adhesive fixing method will not have any side effect on the sealing function.
