扭矩，不直接作用在阀杆上，则阀杆不易产生弯曲变形，而转动扭矩小。
3、阀杆在保护套中上、下运动，与外界隔离，适用于室外安装，避免了大气中吹来的风沙所磨损以及酸碱物质的腐蚀。
UZ41H-16C-DN15,UZ41H-16Y-DN15,UZ41H-16P-DN15,UZ41H-16R-DN15,UZ41H-25C-DN15,UZ41H-25Y-DN15,
UZ41H-25P-DN15,UZ41H-25R-DN15,UZ41H-40C-DN15,UZ41H-40Y-DN15,UZ41H-40P-DN15,UZ41H-40R-DN15,
UZ41H-16C-DN20,UZ41H-16Y-DN20,UZ41H-16P-DN20,UZ41H-16R-DN20,UZ41H-25C-DN20,UZ41H-25Y-DN20,
UZ41H-25P-DN20,UZ41H-25R-DN20,UZ41H-40C-DN20,CCLAIR