It provides a valveball or disk position for a specific input signal.
该类型定位器能按特定的输入信号使阀球或阀板停留在特定位置。
2
The sealing sections of non-return valveball seat were separated, material was changed into zirconium oxide ceramic, 0.
通过分离单向阀球座密封段，材料改为氧化锆陶瓷，密封段流道直径增加0。
3
The experiment and calculating example show when concentration of polymer solution increases angle of lag of valveball opening increases and pump admission coefficient drops.