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    力士樂(lè)波登管壓力開(kāi)關(guān)HED3是液壓-電氣壓力開(kāi)關(guān)。它們的基本構(gòu)成是殼體（1），帶有觸發(fā)觸點(diǎn)（3）的波登管（2），微動(dòng)開(kāi)關(guān)（4）和兩個(gè)調(diào)節(jié)元件（5）。壓力開(kāi)關(guān)所承擔(dān)的任務(wù)是隨壓力變化接通或斷開(kāi)電路。被監(jiān)控的壓力作用于波登管（2）。波登管（2）發(fā)生彎曲，固定在其上的觸發(fā)觸點(diǎn)（3）將波登管（2）的運(yùn)動(dòng)傳遞到微動(dòng)開(kāi)關(guān)（4）。于是，電路就根據(jù)電路的設(shè)置接通或斷開(kāi)。當(dāng)壓力繼續(xù)增加時(shí)，波登管（2）將進(jìn)一步彎曲，這將引發(fā)觸發(fā)觸點(diǎn)（3）操作第二個(gè)微動(dòng)開(kāi)關(guān)，并根據(jù)電路的設(shè)置接通或斷開(kāi)電路。

    切換壓力的調(diào)節(jié)——所需的兩個(gè)切換壓力由微動(dòng)開(kāi)關(guān)的位置決定，能夠在兩個(gè)調(diào)節(jié)元件（5）上相互獨(dú)立地分別進(jìn)行調(diào)節(jié)。當(dāng)使用開(kāi)關(guān)繼電器時(shí)，切換壓差會(huì)發(fā)生無(wú)級(jí)變化。

公司可以從德國(guó)采購(gòu)的力士樂(lè)波登管壓力開(kāi)關(guān)HED 3型號(hào)如下：

HED3OA4X/25          HED3OA4X/25Q          HED3OA4X/25L24       HED3OA4X/25L24Q
HED3OA4X/25L110      HED3OA4X/25L110Q      HED3OA4X/25L220      HED3OA4X/25L220Q
HED3OA4X/25K         HED3OA4X/25KQ         HED3OA4X/25KL24      HED3OA4X/25KL24Q
HED3OA4X/25KL110     HED3OA4X/25KL110Q     HED3OA4X/25KL220     HED3OA4X/25KL220Q
HED3OA4X/25K6        HED3OA4X/25K6Q        HED3OA4X/25K6L24     HED3OA4X/25K6L24Q
HED3OA4X/25K6L110    HED3OA4X/25K6L110Q    HED3OA4X/25K6L220    HED3OA4X/25K6L220Q
HED3OA4X/63          HED3OA4X/63Q          HED3OA4X/63L24       HED3OA4X/63L24Q
HED3OA4X/63L110      HED3OA4X/63L110Q      HED3OA4X/63L220      HED3OA4X/63L220Q
HED3OA4X/63K         HED3OA4X/63KQ         HED3OA4X/63KL24      HED3OA4X/63KL24Q
HED3OA4X/63KL110     HED3OA4X/63KL110Q     HED3OA4X/63KL220     HED3OA4X/63KL220Q
HED3OA4X/63K6        HED3OA4X/63K6Q        HED3OA4X/63K6L24     HED3OA4X/63K6L24Q
HED3OA4X/63K6L110    HED3OA4X/63K6L110Q    HED3OA4X/63K6L220    HED3OA4X/63K6L220Q
HED3OA4X/100         HED3OA4X/100Q         HED3OA4X/100L24      HED3OA4X/100L24Q
HED3OA4X/100L110     HED3OA4X/100L110Q     HED3OA4X/100L220     HED3OA4X/100L220Q
HED3OA4X/100K        HED3OA4X/100KQ        HED3OA4X/100KL24     HED3OA4X/100KL24Q
HED3OA4X/100KL110    HED3OA4X/100KL110Q    HED3OA4X/100KL220    HED3OA4X/100KL220Q
HED3OA4X/100K6       HED3OA4X/100K6Q       HED3OA4X/100K6L24    HED3OA4X/100K6L24Q
HED3OA4X/100K6L110   HED3OA4X/100K6L110Q   HED3OA4X/100K6L220   HED3OA4X/100K6L220Q
HED3OA4X/200         HED3OA4X/200Q         HED3OA4X/200L24      HED3OA4X/200L24Q
HED3OA4X/200L110     HED3OA4X/200L110Q     HED3OA4X/200L220     HED3OA4X/200L220Q
HED3OA4X/200K        HED3OA4X/200KQ        HED3OA4X/200KL24     HED3OA4X/200KL24Q
HED3OA4X/200KL110    HED3OA4X/200KL110Q    HED3OA4X/200KL220    HED3OA4X/200KL220Q
HED3OA4X/200K6       HED3OA4X/200K6Q       HED3OA4X/200K6L24    HED3OA4X/200K6L24Q
HED3OA4X/200K6L110   HED3OA4X/200K6L110Q   HED3OA4X/200K6L220   HED3OA4X/200K6L220Q
HED3OA4X/400         HED3OA4X/400Q         HED3OA4X/400L24      HED3OA4X/400L24Q
HED3OA4X/400L110     HED3OA4X/400L110Q     HED3OA4X/400L220     HED3OA4X/400L220Q
HED3OA4X/400K        HED3OA4X/400KQ        HED3OA4X/400KL24     HED3OA4X/400KL24Q
HED3OA4X/400KL110    HED3OA4X/400KL110Q    HED3OA4X/400KL220    HED3OA4X/400KL220Q
HED3OA4X/400K6       HED3OA4X/400K6Q       HED3OA4X/400K6L24    HED3OA4X/400K6L24Q
HED3OA4X/400K6L110   HED3OA4X/400K6L110Q   HED3OA4X/400K6L220   HED3OA4X/400K6L220Q

    HED 3的注意事項(xiàng)：壓力開(kāi)關(guān)的用處波登管壓力開(kāi)關(guān)只能應(yīng)用于衰減的機(jī)械振動(dòng)（在安裝橡膠緩沖器的情況下）。要補(bǔ)償泵脈動(dòng)，我們建議通過(guò)測(cè)壓軟管（DN大約2毫米，zui小長(zhǎng)度1米）連接壓力開(kāi)關(guān)。切換壓差要確保切換信號(hào)的可靠性，獲得的實(shí)際壓差必須大于壓力開(kāi)關(guān)的現(xiàn)有切換壓差。切換點(diǎn)的長(zhǎng)期漂移 由于設(shè)置的切換點(diǎn)會(huì)隨時(shí)間發(fā)生變化，壓力開(kāi)關(guān)不適用于安全應(yīng)用。