I thought we were here it was Triple offset butterfly valve, the original is not, but is about to change, I heard other factories have been replaced by the Triple offset butterfly valve. So we are almost on the past few days, all the valves must be replaced by Triple offset butterfly valve, because this valve is more stable, but the barrier is also very good, we like this factory for valve device is demanding If poor quality valves, basically do not durable, over a period of time necessary to get a new one, but Triple offset butterfly valve is not the same.