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采用金属密封的阀门一般比弹性密封的阀门寿命长
采用金属密封的阀门一般比弹性密封的阀门寿命长，但很难做到完全密封。金属密封能适应较高的工作 温度，弹性密封则具有受温度限制的缺陷。
The service life of the valve with metal seal is generally longer than that of the valve with elastic seal, but it is difficult to achieve complete seal. The metal seal can adapt to the higher working temperature, while the elastic seal has the limitation of temperature.
如果要求蝶阀作为流量控制使用，主要的是正确选择阀门的尺寸和类型。蝶阀的结构原理尤其适合制作大口径阀门。蝶阀不仅在石油、煤气、化工、水处理等一般工业上得到广泛应用，而且还应用于热电站的冷却水系统。
If butterfly valve is required to be used as flow control, the main thing is to correctly select the size and type of valve. The structure and principle of butterfly valve is especially suitable for making large diameter valve. Butterfly valve is not only widely used in petroleum, gas, chemical industry, water treatment and other general industries, but also in the cooling water system of thermal power station.
The service life of the valve with metal seal is generally longer than that of the valve with elastic seal, but it is difficult to achieve complete seal. The metal seal can adapt to the higher working temperature, while the elastic seal has the limitation of temperature.
如果要求蝶阀作为流量控制使用，主要的是正确选择阀门的尺寸和类型。蝶阀的结构原理尤其适合制作大口径阀门。蝶阀不仅在石油、煤气、化工、水处理等一般工业上得到广泛应用，而且还应用于热电站的冷却水系统。
If butterfly valve is required to be used as flow control, the main thing is to correctly select the size and type of valve. The structure and principle of butterfly valve is especially suitable for making large diameter valve. Butterfly valve is not only widely used in petroleum, gas, chemical industry, water treatment and other general industries, but also in the cooling water system of thermal power station.
