... With CE, ABS, API, WATERMARK CERTFeatures: 1. Metal resilient sealing structure 2. Special design to sesure dual -direction ... longer 5. It has four sealing type: Compound film type, resilient seat type, resilient seat type, "u" type seat Specification: Nominal pressure PN2. ... water, vapour, seawater, air with little dust Metal seated butterfly valve have advantage of light weight, cost effective and ...