This standard specifies the classification, requirements, test methods and inspection rules as well as marking, packaging, transportation and storage of marine manual proportional directional composite valves using mineral-based hydraulic oil as the medium. This standard applies to the design, production and acceptance of composite valves that function as reversing, proportional speed regulation, pressure compensation and safety protection in ship hydraulic systems.
CB/T 3928-2001 history
2001CB/T 3928-2001 Manual proportional flow directional block valve for ships