WESDOM valve has a complete quality management system, from raw material to the foundary, —-casting process—-machine–assembly–spray–packing–stock, we have the inspection procedures in each process, each link is allowed to enter to next step only after reaching the qualified standard, and each link has a professional inspection. From raw material into the factory until the production of a complete valve, a total of 17 tests, each valve will have a qualified certificates, and will wear a two -demensional code for customer to find the valve convennient.