BS EN ISO 10434:2020规定了炼油厂和相关应用中重型螺栓阀盖钢闸阀系列的要求，其中腐蚀、侵蚀和其他使用条件可能表明需要全端口开口、厚壁截面和大阀杆直径。购买本文件时可获得的所有当前修订均包含在购买本文件中。

BS EN ISO 10434:2020 specifies the requirements for a heavy-duty series of bolted bonnet steel gate valves for petroleum refinery and related applications where corrosion, erosion and other service conditions can indicate a need for full port openings, heavy wall sections and large stem diameters.All current amendments available at time of purchase are included with the purchase of this document.