Samson Ringo has concluded the manufacturing and satisfactory testing to be supplied to China National Offshore Oil Corporation (CNOOC) through Samson China for a Desuperheaters modification project in the Huizhou Refinery.
The scope of the supplied goods is: 2 off Cage guided Control valves 6” 2500# A217 WC9 body and T420 trim (Steam service); 3 off Cage guided Control valves 3” 2500# A217 WC9 body and T420 trim; and 3 off Cage guided Control valves 6” 1500# A217 WC9 body and T420 trim.
Valves were fitted with type 3271 actuators and Samson instrumentation. The most challenging process conditions were for the 6” 2500# valves so the Samson Ringo valve solution includes: Special bonnet for high temperature (Design temperature: 540ºC); Pilot trim for balance main plug to reduce the thrust and, therefore have a smooth operation and a cost-effective actuator. This trim was used also to achieve the requirement of leakage class V.; Multi-stage cage with expansion chamber to avoid the choked flow; and Multi drilled diffuser plates at the outlet to assure velocities below 0.3 Mach and low level of noise.
