Small knowledge about the purchase of metal spiral wound gaskets

Metal winding gasket is a important sealing element, is widely used in petroleum, chemical, metallurgy, electric power, shipbuilding and other industries, China's current pressure piping, valves, pumps, heat exchangers and other equipment, key parts of the static seal. Selection and use of high quality metal winding gasket products, to reduce and eliminate run, run, drip, leak, to ensure the safety of the host equipment, the normal operation of the pressure pipeline, has a very important significance.

Buy metal winding gasket products should pay attention to the following points:

1, according to the working conditions of the choice of gasket.

2, stainless steel gasket gasket surface of the body is not allowed to have scars, voids, uneven and rust defects affect the sealing performance of the.

3, compression ratio, and the sealing performance is an important performance index, the sealing gasket in general, to meet the requirements of the compression ratio, rebound rate is higher; and in order to meet the standard requirements of the rebound rate, the compression ratio is larger for test value. Should choose good sealing performance, compression rate is moderate and the rebound rate as large as possible products.

The following points should be paid attention to when installing stainless steel gasket:

1, before the installation carefully check the flange, bolt, nut and gasket quality, carefully check the flange or the installation of the interface, there is no partial port, wrong mouth, mouth, wrong hole and other defects.

2, flange or sealing parts of the surface must be cleaned clean, gasket surface and bolts, thread does not allow adhesion of mechanical impurities.

3, the gasket can not be loaded, should ensure uniform compression.

4, the nut force should be uniform, bolts should be symmetrical, evenly divided into 2 3 times to tighten, uniform compression gasket.