| 摘要 |
A plug cock for aggressive media contains a cock housing (12) with a cock plug (18). The cock housing (10) comprises an outer housing (24) made of a material of high mechanical strength but of low abrasion and corrosion resistance and a ceramic lining (60). All the parts of the lining (60) are supported by the outer housing (24) and subjected only to compressive stress. The outer housing (24) does not come into contact with the flowing substance. The cock plug (18) is also made of ceramic material. <IMAGE>
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