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單向節(jié)流閥的結(jié)構(gòu)原理。該閥是管式聯(lián)接的單向節(jié)流閥，其節(jié)流口采用軸向三角槽式結(jié)構(gòu)。旋轉(zhuǎn)調(diào)節(jié)螺母，可改變節(jié)流口通流面積的大小，以調(diào)節(jié)流量。正向流動時起節(jié)流閥作用；反向流動時起單向閥作用，這時由于有部分油液可在環(huán)形縫隙中流動，可以清除節(jié)流口上的沉積物。在閥體2左端有刻度槽，調(diào)節(jié)螺母3上有刻度，用以標志調(diào)節(jié)流量的大小。

精密節(jié)流閥的結(jié)構(gòu)原理。該閥主要由閥體，調(diào)節(jié)件和節(jié)流套組成。在節(jié)流口處實現(xiàn)對從A到B的流動的節(jié)流。轉(zhuǎn)動節(jié)流桿，可調(diào)節(jié)節(jié)流斷面。由于節(jié)流口制成薄壁孔，故節(jié)流不易受溫度的影響。

力士樂單向節(jié)流閥Z2FS10-5-33/V

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