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Metal spiral gasket purchase notice
- 2019-03-29 -

When many customers call to inquire about the purchase of metal-wound gaskets , they always express more or less confusion. There are technical unclear, quality concerns, and manufacturers and after-sales distrust. Here, teach everyone to solve How to avoid pits in the purchase of metal wound gaskets.

First of all: It is necessary to purchase metal wound gaskets suitable for the current working conditions according to the conditions of the working conditions and the flange sealing surface type.

The second point: When purchasing, try to use the products of the production enterprise with sound and effective operation of the quality management system. You can choose the products of the enterprise that hold the manufacturing license for special equipment (pressure piping components) and the effective type test report.

The third point: the surface of the metal wound gasket main body is not allowed to have flaws, voids, irregularities and rust spots which affect the sealing performance. The non-metallic strip on the surface of the metal wound gasket should be evenly and appropriately raised beyond the metal strip. The texture between the layers should be clear, but the metal strip should not be exposed. The spacing of the solder joints of the metal wound gasket should be uniform, and there should be no defects such as unfusion or over-melting. The surface of the reinforcing ring shall be free from defects such as burrs, irregularities, rust spots, etc. The spacing between the upper and lower sealing surfaces of the metal wound gasket main body and the upper and lower surfaces of the reinforcing ring shall be equal. The inner side of the reinforcing ring and the metal wound gasket body shall be tightly fixed and shall not be loosened; The outer reinforcing ring and the metal wound gasket main body should be positioned and loose.

The fourth point, compression ratio, rebound rate and sealing performance are important performance indicators for sealing metal wound gaskets. Generally speaking, under the premise of meeting the compression ratio requirements, the higher the rebound rate, the better; Under the premise of the rate standard requirements, the test value of the compression ratio is also larger. Products with good sealing performance, moderate compression ratio and maximum resilience should be selected.

Metal winding gasket manufacturing process The new winding machine features high precision, automatic feeding of packing belt, process parameters display and control, and automatic measurement of dimensions. Therefore, the influence of manual operation is eliminated, and the quality of the gasket and the production efficiency are remarkably improved.

Dear customers, please keep in mind the above four points, you can perfectly avoid the various pits encountered in the procurement process of metal wound gaskets.