REXROTH力士樂電磁閥大量庫存*
REXROTH比例壓力控制閥可在沒有外接電源的情況下，自動實現(xiàn)系統(tǒng)的流量平衡。是通過保持孔板（固定孔徑）前后壓差一定而實現(xiàn)流量限定的，因此，也可稱定流量閥。
定流量閥作用對象是流量，能夠鎖定流經閥門的水量，而不是針對阻力的平衡。他能夠解決系統(tǒng)的動態(tài)失調問題：為了保持單臺制冷機、鍋爐、冷卻塔、換熱器這些設備的率運行，就需要控制這些設備流量固定于額定值；從系統(tǒng)末端來看，為了避免動態(tài)調節(jié)的相互影響，也需要在末端裝置或分支處限制流量。
在設計中應注意的問題，流量控制閥的缺點是在于閥門有zui小工作差的要求，一般產品要求zui小工作壓差20KPa，如果安裝在zui不利回路上，勢必要求循環(huán)水泵多增加2米水柱的工作揚程，所以應采取近端安裝，遠端不安的方法。
REXROTH比例壓力控制閥宜水平安裝。水平安裝時，閥蓋宜向上。消防給水系統(tǒng)的減壓閥閥后應有排水設施。自動噴水滅火系統(tǒng)的需減壓時，減壓閥應設置在報警閥前（沿水流方向），與單個報警閥配套設置的減壓閥，可不設備用減壓閥；與多個報警閥配套設置的減壓閥，應設備廠用減壓閥。用于熱水供應工程的減壓閥，應采用熱水型減壓閥。
采用干管干管循環(huán)方式（半循環(huán)方式）的熱水供應工程，減壓閥設置要求應與冷水工程相同；采用立管循環(huán)方式（全循環(huán)方式）的熱水供應工程，減壓閥設置應防止熱水循環(huán)的破壞，各分區(qū)回水管在匯合點壓力應平衡。
德國力士樂熱賣型號如下：更多的力士樂產品相關信息咨詢
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