The design of balance throttle is consulted to the criterion API and others, which isn ot only have a novel structure, but the liable performance. It can be used in diverse of pipes, such as oil, steam and water. By the helping of flow meter, the measurement of the medium's flux could be get exactly. Meanwhile, it can also be used as theclosing valve, which could open and shut pipes. 

There are two kinds of valve about this series. They arc corneal balance throttle and the straight balance one. And the core the valve also owns two kinds：subuli-form surface and parabolic, which could be chosen and designed according to the user.