Parker派克DSDU系列先導(dǎo)式溢流閥 PARKER派克先導(dǎo)式壓力閥 Parker派克DSDU系列先導(dǎo)式溢流閥通過壓力口的開啟使油液流回油箱來限定系統(tǒng)壓力。該結(jié)構(gòu)系列的閥有平穩(wěn)的流量-壓力特性曲線，用于蓄能器系統(tǒng)安全。該類閥經(jīng)過TUV（*監(jiān)控協(xié)會）校準(zhǔn)并頒發(fā)證書。相應(yīng)的TUV證書隨閥一同供貨。（見備注）
PARKER派克先導(dǎo)式壓力閥	Parker派克VBY*A/VMY*A系列先導(dǎo)式壓力閥 Parker派克VBY*A/VMY*A系列先導(dǎo)式壓力閥是一種公稱尺寸為06的先導(dǎo)式壓力閥，可用于無級地調(diào)節(jié)壓力。對于不同的功能例如：壓下力，背壓或夾緊力，它可以使預(yù)先給定的壓力保持不變。其結(jié)構(gòu)為：先導(dǎo)式壓力閥由先導(dǎo)級和主級組成。通過調(diào)節(jié)螺栓來調(diào)節(jié)作用在經(jīng)過硬化處理的閥座和閥錐上的預(yù)壓縮彈簧。預(yù)壓縮彈簧在閥錐上的作用力使得在閥座和經(jīng)過硬化處理的主級滑動閥芯之間產(chǎn)生一個控制壓力，它使受彈簧作用的閥芯保持在調(diào)節(jié)位置上，調(diào)節(jié)位置與預(yù)先給定的壓力相對應(yīng)。
	Parker派克DWL/DWK系列減壓閥 Parker派克DWL/DWK系列減壓閥可以使二次端（油口A）的壓力按設(shè)定值保持不變。為達(dá)到加速響應(yīng)，它裝有滑動閥芯，閥芯中的流量控制閥使控制油流保持不變。
Parker派克先導(dǎo)式壓力閥	Parker派克DSA-P07系列比例溢流閥 Parker派克DSA-P07系列比例溢流閥采用外部的電子模塊進行控制。借此可以無級地選擇溢流功能所需的響應(yīng)的壓力值。針對各自的壓力等級在先導(dǎo)閥中裝有相應(yīng)的調(diào)節(jié)噴嘴。直動式閥NG06也可以被用作DSA系列的先導(dǎo)閥。

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