Witnessing the quality by own eyes is the best way of convincing. We consider it is our honor to test our valves in front of the end user. Petrostar welcome our customers to witness our quality performance of our valves to our testing centers. We bring our testing facility from factories to our localized testing shops. Each of our offices are established with local testing shops, which will enable us to prove our quality products in front of you. It could enable our customers to economically witness and even conduct “Acceptance Tests” from our local offices.