水用两通阀，法兰连接，PN10，行程20mm/40mmVVF31...两通阀适用于闭式循环系统中，冷冻水和低温热水的的控制材质：铸铁阀芯：≤DN40铬镍钢/黄铜≥DN50铬镍钢/青铜承压：PN10连接：法兰低温：-10°C高温：150°C阀杆行程：≤DN80：20mm≥DN100：40mm西门子水用电动二通阀VVF31型号概览:公称直径mmKvs流量系数[m3/h]SAXSKDSKBSKC型号[两通阀]△Pmax△Ps△Pmax△Ps△Pmax△Ps△Pmax△PsVVF31.15-2.5VVF31.15-4152.54300100030010003001000VVF31.24VVF31.25-6.3VVF31.25VVF31.25-102556.37.510300100030010003001000VVF31.39VVF31.40VVF31.40-25401219253005253007753001000VVF31.50VVF31.50-405031403003253004753001000VVF31.65VVF31.65-63654963175175275275300750VVF31.80VVF31.80-1008078100100100175175300500VVF31.90VVF31.100-160100