Key points for the purchase and placement of Spiral Wound Gasket
Spiral Wound Gasket is a tight sealing element, Spiral Wound Gasket is widely used kerosene, chemical, metallurgy, power generation, shipbuilding and other industries, is the current pressure pipeline, valves, pumps, heat exchangers and other equipment deployment Sealed key parts. So the choice and the use of high-quality Spiral Wound Gasket products, the elimination and elimination of running, running, dripping, leakage, to ensure that the host set up equipment deployment quiet, normal operation of the pressure pipeline, with a very tense significance.
First, the placement of metal winding pad should be detailed the following points:
1, before the placement of detailed inspection flange, bolts, nuts and gasket quality, detailed inspection flange or interface placement environment, with or without bias, wrong mouth, mouth, wrong hole and other defects.
2, flange or seal the appearance of the surface must be clean, sealed gasket appearance and bolts, the thread does not allow adhesion of machine impurities.
3, the gasket can not be installed, should be guaranteed pressure symmetry.
4, tighten the nut when the force should be symmetrical, the bolt should be symmetrically symmetrical points 2 to 3 times tighten, so that the gasket pressure pressure symmetry.
Spiral Wound Gasket is an important sealing element, is widely used in petroleum, chemical, metallurgical, power generation, shipbuilding and other industries, is the current pressure pipelines, valves, pumps, heat exchangers and other equipment, static sealing key components. Therefore, the choice and use of high-quality Spiral Wound Gasket products, to reduce and eliminate the run, run, drip, drain, to ensure the safety of the host equipment, the normal operation of the pressure pipeline, has a very important significance. How to buy Spiral Wound Gasket?
First, the purchase of Spiral Wound Gasket products should pay attention to the following points:
1, according to working conditions, flange sealing type selection of gasket.
2, the selection of quality management system sound and effective operation of the production enterprises of the product, the best use of special equipment (pressure pipe components) manufacturing license and effective type of test report of the enterprise products.
3, the main surface of the gasket does not allow the impact of sealing performance of the scars, voids, rugged and rust defects. Gasket body surface non-metallic belt should be uniform, appropriate higher than the metal band, interlayer texture should be clear, but not exposed metal belt. Metal wound gasket spacing should be uniform, there should be no fused or over-melting and other defects. Strengthen the ring surface should not have burrs, rugged, rust and other defects, the upper and lower sealing surface of the gasket and the upper and lower surface of the ring should be equal to the distance between the inner ring and the main body should be tightly fixed, can not be loose; Gasket between the main body should be positioned and may be appropriate to loose.
4, compression rate, rebound rate and sealing performance is the important performance indicators of gaskets, in general, to meet the requirements of the compression rate under the premise of the higher the better the rebound rate; and meet the requirements of the rebound rate standards Under the premise of the compression rate of the test value is also bigger as well. Should choose a good sealing performance, moderate compression rate and rebound as much as possible products.
Second, the installation of Spiral Wound Gasket should pay attention to the following points:
1, carefully check the flange before the installation, bolts, nuts and gasket quality, carefully check the flange or interface installation, with or without bias, wrong mouth, mouth, wrong hole and other defects.
2, the flange or sealing parts of the surface must be clean, gasket surface and bolts, thread does not allow adhesion of mechanical impurities.
3, gasket can not be installed partial, should ensure uniform pressure.
4, tighten the nut when the force is uniform, the bolt should be symmetrically evenly divided into 2 to 3 times tighten, so that the gasket pressure evenly.
We must be in the installation of metal spiral wound before the need to understand the precautions for its installation, so as to be able to make it better play their own role. But also to allow the equipment at work to reduce the probability of occurrence of some failures. For the wound parts of the metal wound gasket, we must remember that in the flange sealing surface, it is not possible to arbitrarily set the width of the winding part according to its own idea, because this behavior will affect the ability of the bolt To achieve the compression force, so that the sealing performance of the gasket can not achieve the desired effect.