CT-RA series O-type through ball valve is composed of CURTO series double piston drive gear rack angular stroke pneumatic actuator and O-type through ball valve body assembly. DN15~DN200 is floating ball structure, DN250~DN300 adopts fixed ball structure. Special elastic sealing seat structure not only ensures reliable sealing, but also ensures reliable sealing. And with the straight cylindrical flow hole ball valve core has a good self-cleaning effect on the viscous medium, the fiber medium and shear blocking function, full diameter design, fluid pressure loss is small, different metal and non-metal sealing material combination can ensure reliable transmission in the working temperature range of -29 ° C ~450 ° C, cutting performance is excellent, CT-RA series O-type ball valve has the characteristics of compact structure, sensitive operation, stable and long service life, which can be widely used in petroleum, chemical industry, electric power, paper making, metallurgy, sewage treatment and other industrial control fields.