... API607,ISO9001-2000 4.Grade A2 manufacturer. Application standard1. Quality system: TS, ISO90012. Design: refer to GB12338,MSS-SP-683. ... “wedge effect” and to realize the tightest shut-off with the smallest torque.SpecificationDN mmDN80-2400mmPNANSI 150, 300,600, ... , Bubble tightCerfificationWorkshop and equipmentsOfficeCompany Mansion HB2416 Batterfly valve can control and shut-off for instrument and ...