... 150lbs-2500lbs Size from 1"-60" or DN25-DN1500 Acc to ANSI, BS, EN, API etc. With CE, ABS, API, ... WATERMARK CERTFeatures: 1. Metal resilient sealing structure 2. Special design to sesure dual -direction sealing properly 3. Paremeter computer design and ... water, vapour, seawater, air with little dust Metal seated butterfly valve have advantage of light weight, cost effective and low operation ...