DA-20/先導(dǎo)式卸荷閥DA20

產(chǎn)品概述

DA-20先導(dǎo)式卸荷閥（Pilot-operated Unloading Valve DA20）是一款高效液壓控制元件，專為液壓系統(tǒng)中的壓力調(diào)節(jié)與卸荷需求設(shè)計(jì)。其核心功能是通過先導(dǎo)控制實(shí)現(xiàn)主閥芯的精準(zhǔn)動作，從而在系統(tǒng)壓力達(dá)到設(shè)定值時(shí)自動卸荷，降低能耗并延長泵的使用壽命。該閥采用模塊化設(shè)計(jì)，適配多種液壓回路，尤其適用于蓄能器系統(tǒng)或高低壓泵組合工況，能有效平衡系統(tǒng)壓力波動，確保穩(wěn)定運(yùn)行。

技術(shù)特點(diǎn)

DA-20閥體采用高強(qiáng)度鑄鐵材質(zhì)，內(nèi)部結(jié)構(gòu)集成單向閥與先導(dǎo)控制單元，實(shí)現(xiàn)卸荷與安全保護(hù)雙重功能。其先導(dǎo)控制油路通過阻尼器調(diào)節(jié)響應(yīng)速度，確保切換過程平穩(wěn)無沖擊。工作壓力范圍覆蓋常規(guī)液壓需求，最大流量可達(dá)240L/min，介質(zhì)兼容礦物油與磷酸酯液壓油，適用溫度范圍為-20℃至+70℃。閥體提供多種調(diào)節(jié)形式，包括旋鈕、帶護(hù)罩螺釘及刻度旋鈕，便于現(xiàn)場壓力微調(diào)。

應(yīng)用場景

該閥廣泛應(yīng)用于冶金、工程機(jī)械、機(jī)床等領(lǐng)域的液壓系統(tǒng)。在蓄能器回路中，可實(shí)現(xiàn)泵的自動卸荷；在高低壓泵系統(tǒng)中，可切換高壓泵工作、低壓泵卸荷，優(yōu)化能源效率。其緊湊的板式連接設(shè)計(jì)適配標(biāo)準(zhǔn)安裝接口，支持油路塊或底板安裝，簡化系統(tǒng)集成。

產(chǎn)品優(yōu)勢

DA-20以可靠性為核心，通過優(yōu)化流道設(shè)計(jì)減少壓力損失，同時(shí)內(nèi)部密封材料選用耐磨聚酯，確保長期密封性。其先導(dǎo)控制結(jié)構(gòu)顯著降低主閥啟閉噪音，適用于對噪音敏感的環(huán)境。此外，閥體維護(hù)便捷，無需專用工具即可完成關(guān)鍵部件更換。

Product Introduction

The DA-20 Pilot-operated Unloading Valve is a high-performance hydraulic control component designed for pressure regulation and unloading in hydraulic systems. Its pilot-controlled mechanism ensures precise main spool operation, automatically unloading when system pressure reaches the set value, thereby reducing energy consumption and extending pump service life. The modular design adapts to diverse hydraulic circuits, particularly in accumulator systems or high-low pump configurations, effectively balancing pressure fluctuations.

Key Features

Constructed with durable cast iron, the valve integrates a check valve and pilot control unit for dual unloading and safety functions. The pilot circuit features dampers for smooth switching response. With a maximum flow rate of 240L/min, it supports mineral oil and phosphate ester fluids within -20℃ to +70℃. Multiple adjustment options (knob, shielded screw, or dial) facilitate on-site pressure calibration.

Applications

Ideal for metallurgy, construction machinery, and machine tools, the valve enables pump unloading in accumulator circuits or optimizes energy use in dual-pump systems. Its compact flange connection complies with standard interfaces, simplifying integration via manifold or baseplate mounting.

Advantages

The DA-20 emphasizes reliability with low-pressure-drop flow paths and wear-resistant polyester seals. Its pilot structure reduces operational noise, suitable for noise-sensitive environments. Maintenance is simplified with tool-free access to critical components.

567121922

DA-20/先導(dǎo)式卸荷閥DA20
 

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