4.注意减压阀的减压保障系统。无论选用比例式还是可调式减压阀,其减压比P1∶P2不宜选择过大,一般应控制在5∶1之内。超过这个范围易产生气蚀现象,损坏阀件,产生啸叫噪音。有些活塞式减压阀,制造厂在其阀体上加工一个直径1.5mm左右的小孔,其功能是让阀芯运动时起到透吸气作用,维护管理时应注意千万不要将小孔塞住,否则影响减压阀的正常运行。
5.加强减压阀保障系统的管理巡视,要注意观察减压阀本身的工作动态。阀前、阀后压力数值接近,表明减压阀本身已存在故障。即活塞式减压阀的阀芯与阀体间的平面密封橡胶件损坏;薄膜式可调型减压阀主阀膜片有裂痕和O型圈损坏,及导阀连通管堵塞,造成减压阀减压作用削弱或者失效。这对分区管网危害极大,特别是许多用水设备可能因超压力而出现爆管,必须及时修复。比例式(活塞型)减压阀阀体上的透吸气小孔如出现滴漏不止,表明阀芯上几档O型密封圈已经磨损,要更换密封件。但在修理拆装减压元件时,要谨慎细心,调换内密封件;清理杂物时,应因势利导,不要用金属棒、硬梗撬阀的活动部位,使用木榔头和木柄敲击震动,慢慢拆卸阀内部件。修理完毕后重新安装时,一定要和阀门上的流向指示保持一致。
北部精机电磁换向阀SWH-G02-N2-A220-10
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台湾久冈电磁阀 台湾久冈溢流阀 台湾久冈叠加阀 台湾久冈节流阀
台湾久冈插装阀 台湾久冈单向阀 台湾久冈手动阀 台湾久冈减压阀
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