Inspection Team, QC Team of Dervos Valves
For each order, our inspection team not only takes part in the final inspection, but also guards each procedure to avoid defect and make sure the delivery time.
The details of each inspection and some points during procedure will be presented on Dervos's inspeciton report after final inspection.

Our inspection is acted according to international standard, all pressure tests are in conformity with API598, API6D and DIN3230 standards. Additionally, we also adopt some special tests in accordance with API6D, for example, low pressure air test, DBB test and DPE test. We take the test under full operating pressure, this is the only test to find the possible leakage at the connection place of valve body and valve cover, valve stem, accessories, lubricating grease injection device, etc.