软质密封垫对法兰面的光洁程度要求低很多，这是因为，它容易变形，能够堵死加工刀纹，从而防止了泄露。
Soft gasket to the bright and clean degree flange low demand a lot, because, this is, it easily, can change processing knife lines, and can prevent the leakage.
其次是法法兰想配套的密封垫应有良好的耐油和抗老化性能，以及比较好的弹性和机械强度。
Second, the flange should be supporting the sealing gasket should have good oil resistance and aging resistance, as well as good flexibility and mechanical strength.
法兰连接时加密封垫后均匀锁紧联接螺栓。
When connecting flange, add sealing mat and lock connected bolt.
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