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Metal spiral wound gasket for mechanical seal-

by:Lepu Seal     2021-05-19
Metal wound gasket for mechanical seal
 2017-06-22  
Metal spiral wound gasket for mechanical seal:
121 mechanically sealed metal wound gaskets cleverly use metal heat-resistant parts, elasticity and strength, and softness of non-metallic materials, so the sealing performance is better, and the performance of the flexible right ink pad wound with stainless steel tape is the best . The pre-tightening ratio is smaller than that of asbestos winding pads, and there is no shortcoming of asbestos fiber pore leakage. Figure 3-10 shows the relationship between the preload pressure and the leakage rate.
The stainless steel belt flexible graphite wound gasket is used in a gas medium with a pressure of 14.7MPa (up to 19.6MPa in the country), and it can be used up to 30MPa in a liquid. Temperature -190-600°C (can be used up to 1000°C in the absence of oxygen and low pressure). PTFE has good low temperature resistance, and its yield strength at low temperature is much higher than its strength at room temperature. Therefore, PTFE wound gaskets are used in low-temperature media, such as liquid hydrocarbons. At the same time, due to the addition of metal tape to improve the thermal conductivity, the temperature of the PTFE wound gasket can reach 250°C, and it can be used up to 9MPa and 200°C in acidic media.
Spiral wound gaskets are suitable for heat exchangers, reactors, pipelines, valves, pump inlet and outlet flanges with large pressure and temperature fluctuations. For those with medium or above torque and temperature over 300℃, the use of inner ring, outer ring or inner and outer damage should be considered. If a concave-convex flange is used, a winding cushion with an inner ring is better for fruit picking. A good sealing effect can also be achieved by sticking flexible graphite sheets on both sides of the flexible graphite winding gasket.  495.html,

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