威格士VICKERS柱塞泵EATON伊顿25V12A-1C22R 4520V50A5-1CC22R

2520V21A2-1AA22R 2520V21A2-1CC22R 2520V21A5-1AA22R

电动球阀处于完整开启地位时，蝶板厚度是介质流经阀体时唯一的阻力，因此通过该阀门所发生的压力降很小，故具有较好的流量把持特征。电动球阀有弹密封和金属的密封两种密封型式。弹性密封阀门，密封圈可以镶嵌在阀体上或附在蝶板周边。

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边。 采取金属密封的阀门一般比弹性密封的阀门寿命长，但很难做到完整密封。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 点。 假如请求电动球阀作为流量把持使用，重要的是准确选择阀门的尺寸和类型。