Second, the performance and characteristics
1, for wide range of operating conditions. To high temperature, high pressure and adapt to ultra-low temperature or under vacuum conditions of use. By changing the combination of gasket materials, gasket solve a variety of media on the chemical corrosion.
2, the stress compensation ability. Temperature and pressure fluctuations in the frequent station, the sealing performance is stable and reliable.
3, the sealing performance.
4, in contact with the flange gasket surface and less precision.
5, easy installation, low pressure gasket preload.

Third, the gasket type
1, A, divided four ways wound gasket sheet: basic type, with inner ring type, with outer ring type, with inner and outer ring.
B, heat exchanger spiral wound gasket general points: The basic model and with inner and outer ring.
2, the commonly used materials:
A, strip: 08F, 0Cr18Ni9 (304), 0Cr18Ni9Ti, 1Cr18Ni9Ti (321), 0Cr17Ni12, M02 (316), 00Cr17Ni14M02 (316L)
B, inner and outer ring with a (cold) plate: outer: low carbon steel, 0Cr13, oCr18Ni9 inner ring: Steel material is usually the same or consultation.
C, non-metal band: flexible graphite, special asbestos, PTFE, non asbestos paper.

Fourth, use of
1, temperature: -196 ℃ -700 ℃ (oxidizing medium is not higher than 600 ℃)
2, the use of pressure: ≤ 25MPa
3, gasket coefficient: m = 2.5-4
4, the minimum sealing pressure ratio: y = 68MPa
5, the maximum processing size: 2800mm