DEVELOPS NEW APPROACH FOR LIFT PLUG VALVES

We has developed new actuation solution for a range of specialize d oil and gas industry, including a new approach for lift plug valves. The shut-off valves are widely adopted in high-temperature, high-pressure applications and for the conduction of media containing solid. Within the lift plug valve, different movements have to be coordinated during operation from one end positions to the other: the closing elemen t must first be lifted from its seat, then rotated by 90 degrees from close to open, and finally lowered back into the valve seat. The new approach uses two actuators, one designated to be responsible for lifting/lowering while the other controls part-turn movement. The entire procedure is coordinated by the integral controls of the two actuators. Communication with the distributed control system is simplified as just two commands "Running OPEN" or "Running CLOSE" need to be sent to the master actuator. Successful installations, include a BPO tank farm in Belgium and a Tatneft refinery in Russia.