Feature: 1. The product has logical structure, reliable seal, excellent performace and nice design. 2. The seal surface is builu-up welding with co-hard alloy, which is attriction resistant, corrision resistant, has good friction resistant. 3. It has double seal capbility, thus is nore reliable. 4. The stem may show the position of lift, thus it is clear. 5. The stem is quenched and temperatured, and its surface is treated by nitriding treatment.
Standard: Design and Manufacture: API600, API6D, BS1414, BS1873 etc. Face to face(end to end):ANSI B16.10, Flanged connection: ANSI B16.5 Butt welded end: ANSI B16.25 Test and inspection: API598,
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