Crane globe valves are highly efficient for services requiring frequent operation and throttling when pressure drop across the valve is about 20% of inlet pressure.
For compressible fluids, where pressure drop exceeds half the inlet pressure.
对于可压缩性流体，如果压降超过进口压力的一半。
3
Through the contrastive test on the pressure characteristic of inlet structure, the relation that the inlet structural dimension and operation parameter affect the pressure drop has been established.