The valve rod set up jacket protection , other special instruments are unable to raise the valve rod rotation 调节阀杆设置外套保护,其它专用工具无法使阀门杆转动。
According need to gate valvechange the valve installed state , stressed the need to code , so that hand valve and valve - round connection , the realization of the valve rod rotation 根据需要改变阀门设置状态时,需经调码后,使阀门手轮与阀门杆联接,实现阀门杆的转动。