REXROTH力士乐电磁阀大量库存*
REXROTH比例压力控制阀可在没有外接电源的情况下，自动实现系统的流量平衡。是通过保持孔板（固定孔径）前后压差一定而实现流量限定的，因此，也可称定流量阀。
定流量阀作用对象是流量，能够锁定流经阀门的水量，而不是针对阻力的平衡。他能够解决系统的动态失调问题：为了保持单台制冷机、锅炉、冷却塔、换热器这些设备的率运行，就需要控制这些设备流量固定于额定值；从系统末端来看，为了避免动态调节的相互影响，也需要在末端装置或分支处限制流量。
在设计中应注意的问题，流量控制阀的缺点是在于阀门有zui小工作差的要求，一般产品要求zui小工作压差20KPa，如果安装在zui不利回路上，势必要求循环水泵多增加2米水柱的工作扬程，所以应采取近端安装，远端不安的方法。
REXROTH比例压力控制阀宜水平安装。水平安装时，阀盖宜向上。消防给水系统的减压阀阀后应有排水设施。自动喷水灭火系统的需减压时，减压阀应设置在报警阀前（沿水流方向），与单个报警阀配套设置的减压阀，可不设备用减压阀；与多个报警阀配套设置的减压阀，应设备厂用减压阀。用于热水供应工程的减压阀，应采用热水型减压阀。
采用干管干管循环方式（半循环方式）的热水供应工程，减压阀设置要求应与冷水工程相同；采用立管循环方式（全循环方式）的热水供应工程，减压阀设置应防止热水循环的破坏，各分区回水管在汇合点压力应平衡。
德国力士乐热卖型号如下：更多的力士乐产品相关信息咨询
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 R900187193 VENTILSITZDBETR-1X/350
 R900182529 SPINDELDBET-52/350
 R901000848 DBET-6X/350G24K4V

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