管道阻力系数及管道压力损失计算.docx

常用管件和阀件底局部阻力系数C值管件和阀件名 称自值标准弯头45°,夕0.3590°,片0.7590。方形弯头1.3180。回转头1.5活接管0.4弯管R/d30°45°60°75°90°105°120°1.50.080.110.140.160.1750.190.202.00.070.100.120.140.150.160.17突然扩大A/A,00.10.20.30.40.50.60.70.80.91C10.810.640.490.360.250.160.090.040.011突然缩小A>/A200.70.20.30.40.50.60.70.80.91%0.50.470.450.380.340.30.250.200.150.090标准三通管己=0.41=1.5匕=1.3自=1闸阀全开3/4开1/2开1/4开0.170.94.524截止阀（球心阀）全开匕-6.41/2 开&=9.5碟阀a5°10°20°30°40°45°50°60°70°J0.240.521.543.9110.818.730.6118751旋塞G5°10°20°40°60°C0.240.521.5617.3206单向阀摇板式自=2球形式自=70角阀（90。）5底阀1.5波水器（或波水网）2水表（盘形）7沿程阻力损失系数表2管子内径mm50751001251501752C<0225X0. 04550. 04180. 0380. 03520. 03320. 03160. 03040. 0293管子内径mm250275300325350400450500X0. 02840. 02760. 0270. 02630. 02580. 0250. 02410. 0234沿程损失：%=几4'2 / d 2g2局部损失：儿=占二一