The Max-seal valve is the result of years of experience in design and manufacture of both ball and butterfly valves. MaxSeal’s manufacturing quality system is strictly certified by CQC ISO9001, PED CE is certified by DNV. Valve surface quality in line with NORSOK marine requirements，Valve elastomeric compounds have approval of DVGW, KTW, WRAS and FDA. Valves also have marine approval with CCS, LR, BV.