日本豐興HB3-DG3K-03平衡閥

平衡閥是在水力工況下，起到動態(tài)、靜態(tài)平衡調節(jié)的閥門。平衡閥可分為三種類型：靜態(tài)平衡閥、動態(tài)平衡閥及壓差無關型平衡閥。靜態(tài)平衡 閥亦稱平衡閥、手動平衡閥、數(shù)字鎖定平衡閥、雙位調節(jié)閥等，它是通過改變閥芯與閥座的間隙（開度），調整閥門的Kv（閥門流通能力）來改變流經閥門的流動阻力以達到調節(jié)流量的目的，其作用對象是系統(tǒng)的阻力，消除系統(tǒng)中阻力不平衡的現(xiàn)象，從而能夠將新的水量按照設計計算的比例平衡分配，各支路同時按比例增減。靜態(tài)平衡閥在系統(tǒng)中應用場合可以在：總管、立管、水平支管以及末端等使用，效果等同于同程管

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日本豐興HB3-DG3K-03平衡閥

當系統(tǒng)的運行調節(jié)采用集中量調節(jié)（比如水泵的變速調節(jié)等）時，不能采用平衡閥和自力式壓差平衡閥。因為這種調節(jié)是通過改變水量實現(xiàn)的，因而調節(jié)時改變了系統(tǒng)的水力工況，所以若采用平衡閥，勢必造成有的閥能正常工作，但系統(tǒng)流量過大（超過此時的熱負荷所對應的流量），有的閥全開仍達不到流量要求，有的閥因兩端壓差達不到啟動壓差而不能正常工作，即出現(xiàn)流量分配的混亂。顯然，由于平衡閥的存在而造成了系統(tǒng)集中調節(jié)不能實現(xiàn)。這時若采用手動調節(jié)閥，則系統(tǒng)總流量增減時，各支路、各用戶的流量可以同比例增減，即系統(tǒng)的集中調節(jié)可以傳達至每一個末端裝置。當系統(tǒng)的運行調節(jié)為質調節(jié)時，可以采用平衡閥和自力式壓差平衡閥，因為這種調節(jié)方式只改變供水溫度，而與系統(tǒng)的水力工況無關，即在不改變系統(tǒng)的水力工況的情況下，把調節(jié)傳達到每個用戶和設備。采用平衡閥，可以吸收網路的壓力波動，維持被控負載的流量恒定。采用平衡閥可以吸收網路的壓力波動，以及克服內擾（被控環(huán)路內部的阻力變化），以維持施加于被控環(huán)路上壓差恒定。當系統(tǒng)采用分階段改變流量的質調節(jié)時，雖然每個階段流量不變。但若采用平衡閥，每個流量階段要對控制流量或控制壓差進行設定，給運行管理帶來很大不便，所以不宜采用。