根据需要和输送介质，可采用机械密封和填料密封两种，且这两种结构具有互换性。
According to needs and delivery medium, can be used two kinds of mechanical seals and packing seal, and the structure of these two kinds of interchangeability.
所有不锈钢阀体、阀腔和填料腔等所有与流体介质接触的部件都采用坚固耐用、一体式结构。
The all stainless body, chest, and packing chamber provide durability and integrity for all wetted parts.
选取粗砂、粉煤灰、细煤渣、活性炭和空心砖粉块作为介质，再按适当的比例配成填料处理柱，进行处理低浓度生活污水的研究。
Grit, fly ash, cinder residue, active carbon, air brick detritus were used as filtering media according to proper proportion for low concentration domestic sewage treatment.
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