DS DS/EN ISO 10434
DS DSEN SO 10434 2004-SEP-17 Bolted bonnet steel gate valves for the petroleum petrochemcal and alled ndustres
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This standard specifies the requirements for a heavy-duty series of bolted bonnet steel gate valves for petroleum refinery and related application where corrosion, erosion and other service conditions would indicate a need for full port openings, heavy wall sections and large stem diameters.