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design and manufacture :EN13709
face to face;EN558-1
flange end dimension:EN1092-1
inspection and test:DIN3230
feature:stem with bellow seal,two-ply bellows sealed,secondary sealing,gland packing,lubricating nipple,position indicator,Non-rising handwheel.Non-roation lock od stem
application:power plants flue gas purification plant,Gas supply,vapour facilities,vacucum facilities,hot water ,heating system


