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(dòng)實(shí)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(shí)現(xiàn)流量限定的，因此，也可稱定流量閥。
定流量閥作用對(duì)象是流量，能夠鎖定流經(jīng)閥門的水量，而不是針對(duì)阻力的平衡。他能夠解決系統(tǒng)的動(dòng)態(tài)失調(diào)問題：為了保持單臺(tái)制冷機(jī)、鍋爐、冷卻塔、換熱器這些設(shè)備的率運(yùn)行，就需要控制這些設(shè)備流量固定于額定值；從系統(tǒng)末端來看，為了避免動(dòng)態(tài)調(diào)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(shè)計(jì)中應(yīng)注意的問題，流量控制閥的缺點(diǎn)是在于閥門有zui小工作差的要求，一般產(chǎn)品要求zui小工作壓差20KPa，如果安裝在zui不利回路上，勢(shì)必要求循環(huán)水泵多增加2米水柱的工作揚(yáng)程，所以應(yīng)采取近端安裝，遠(yuǎn)端不安的方法。
REXROTH比例壓力控制閥宜水平安裝。水平安裝時(shí)，閥蓋宜向上。消防給水系統(tǒng)的減壓閥閥后應(yīng)有排水設(shè)施。自動(dòng)噴水滅火系統(tǒng)的需減壓時(shí)，減壓閥應(yīng)設(shè)置在報(bào)警閥前（沿水流方向），與單個(gè)報(bào)警閥配套設(shè)置的減壓閥，可不設(shè)備用減壓閥；與多個(gè)報(bào)警閥配套設(shè)置的減壓閥，應(yīng)設(shè)備廠用減壓閥。用于熱水供應(yīng)工程的減壓閥，應(yīng)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(yīng)工程，減壓閥設(shè)置要求應(yīng)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(yīng)工程，減壓閥設(shè)置應(yīng)防止熱水循環(huán)的破壞，各分區(qū)回水管在匯合點(diǎn)壓力應(yīng)平衡。
德國力士樂熱賣型號(hào)如下：更多的力士樂產(chǎn)品相關(guān)信息咨詢
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