Shanghai W-Flow Control has nearly thirty years of service and technical background experiences in the valve industry, we are able to offer professional service and reliable product to our customers. Our company is striving to achieve customer satisfactions under strict Quality Management System and we produce our product according to international standard, ISO9001, ANSI, API Fire-Safe Approval, CRN Registered and PED 97/23/EC Module H certificate, 3A, TUV/TRD 100, DNV, BV MARINE Certificate, ATEX, TA-Luft, ISO 15848 , REACH, RoHS. API...