pre-308风机盘管阀门设计用于供暖和制冷暖通空调系统中热水和冷水的开/关控制。配备了具有弹簧复位机构的单相磁滞同步电机和阀体式执行器。 pre-308 is designed to control on/off of the cooling/heating water in hvac. with spring return setup, single phase hysteresis synchronous motor and valve actuator. 技术数据 technical parameter 电源信号 power signal 230v/110v/24v ac 控制信号 control signal 开/关 on/off 开启时间 start time 8…10s 功率 power consumption 7w 介质温度 medium temperature -10…+90°c 压力等级 pressure level pn16 连接件 connecting 内螺纹 internal thread 阀体材质 valve material 黄铜 brass 驱动器外壳材质 actuator cover material 不锈钢基座、铝外壳 stainless steel base, aluminium shell 防护等级 protection level ip44 型号 model no. 阀门 valve 规格specification kvs 关闭压差 closed differential pressure pre-308-15 2通two-way dn15 3.2 300kpa pre-308-20 2通two-way dn20 4.6 250 kpa pre-308-25 2通two-way dn25 5.8 200kpa pre-3083-15 3通 three-way dn15 3.2 300kpa pre-3083-20 3通 three-way dn20 4.6 250 kpa pre-3083-25 3通 three-way dn25 5.8 200kpa