1. The chemical composition and mechanical properties of the main material meet the requirements of national standards.

2. All valve bodies and parts are processed by CNC machine tools and interchanged to ensure product accuracy.

3. The quality inspector inspects each incoming blank one by one, and the residual blank is directly processed back to the furnace.

4. Before the whole product is assembled, the kerosene and anti-rust oil are cleaned by high-pressure jet. After the pressure test, the test pressure medium is cleaned and sprayed with anti-rust oil. The cleanliness of the inner cavity meets the requirements of JB/T7748.

5. Each valve must be tested in accordance with national standards, unqualified products will never leave the factory.