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1.blow -out proof stem 2.investment casting body
3.full port
4.face to face :ansi b 16.10/JIS B2002/DIN N16-40
5.ISO5211 direct mounting pad
6.fire-safe design avavilable acc:api607
7.design acc:asme b 16.34
8.flange standard :asme b 16.5/JIS B 2220/DIN2633
9.Inspection&testing acc:api598
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