Fully Metal Seated Trunnion Mounted Ball Valve for Refining Equipment
There are some critical valves for the Oil Refining Process. Such as the Continuous Catalytic Reforming, Fluidized Catalytic Cracking(FCCU or RFCCU), etc. Due to the catalyst contained in the fluid, the traditional valve is easy to be broken with very short service life during the real application. This problem was increased the maintenance cost of the final user largely.
One of the oil refining project located in China need some fast shut down valves to be used for their reforming equipment. On March 2019, C Tech Science and Technology Co., Ltd has reviewed all the technical data of the application, and provided the entire valve control solutions to reduce the maintenance cost successfully.
The fluid medium is catalyst contained, and the Catalyst hardness is HRC50 which was very easy to break the ball and seat during operation. On the other hand, it has the long service life and fast shut down request. So, C Tech Science and Technology Co., Ltd provided the entire solution as below:
Fully metal seated trunnion mounted ball valves were adopted. The ball and seat were coated with Tungsten Carbide, and its hardness is HRC65. And the valve seat leakage stand meet the need of Class VI as per ANSI FCI70-2. With the C Tech Company special design, the valve torque is also smaller than traditional metal seated ball valve. Due to the emergence operation request incase of power off and no compress are situation. Declutchable gear box was adopted between the valve and actuator. About the valve actuator, we selected the pneumatic rack and pinion actuator. As we know the spring return rack and pinion actuator couldn’t meet the request of 300000 cycles with load at 60%, cased from the spring problem. So, we improve the spring and adopt the high performance spring wire from UK. About the solenoid valve, Pneumatrol Solenoid valve was adopted to keep the high performance and long time reliability. And both the solenoid valves and limited switches met the explosion request of Exia II CT6.