There are two types of seals. Static seal and dynamic seal.
密封垫的种类有两种。静密封和动密封。
According to the materials can be divided into dynamic seal metal seal and metal sealing valve.
根据动密封的材料也可分金属密封和非金属密封阀门。
Create a third dynamic seal in the valve, in addition to the upstream and downstream seats, by introducing the purge media.
通过引入清洗流体介质，可以在上游和下游阀座以外，在阀门内生成第三动态密封。
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