We have our own independent inspection team, whose members have more than 20 years' experience in the valve field ; more important it is fully independent from our factory. The team has complete knowledge about all processes of manufacturing, including design, machining, assembly, testing, marking, painting, package, and so on. In addition, Our QC team is quite familiar with all relevant international standards such as ASME, API, EN, DIN, BS, MSS, ISO and so on.