FRD.WJA3.002電磁閥_大德匯成科技（廈門）有限公司

FRD.WJA3.002

電磁換向閥FRD.WJA3.002-220VAC是一款兩位五通電磁換向閥，其核心工作原理基於電磁控制與閥芯換向機制。閥體內置有閥芯、彈簧以及電磁線圈。在常態下，即線圈未通電時，閥芯在彈簧力的作用下保持在初始位置。此時，控制介質（如壓縮空氣或液壓油）從P口進入，經過A口輸出，而B口則與T口（排氣或回油口）相連通。當線圈通電時，產生的電磁力會克服彈簧力，推動閥芯移動，從而改變介質的流向。具體來說，P口與B口相連通，A口則與T口相連通。一旦線圈失電，閥芯會在彈簧力的作用下復位，恢復常態下的流向，實現介質流向的快速切換。

這款電磁換向閥適用於廣泛的氣動和液壓控制係統。在氣動係統中，它可以用於控制氣缸的伸縮；在液壓係統中，則可以用於控制液壓馬達的正反轉。此外，它還廣泛應用於自動化生產線的執行元件驅動等場景。適配的介質包括壓縮空氣（壓力範圍0.1-1.0MPa）和液壓油（粘度10-40cSt，壓力範圍0.1-31.5MPa）。其工作溫度範圍在氣動係統中為-5℃~50℃，在液壓係統中則為-20℃~80℃。響應時間不超過0.1秒，非常適合需要快速響應的自動化設備、工程機械以及機床等應用。

在選型時，需關注幾個關鍵要點。首先是介質類型，根據係統選擇氣動或液壓型號，並確保介質與密封件兼容，以避免泄漏。其次是額定電壓，需與係統電源匹配，如本型號為220VAC，允許波動範圍±10%。再者是通徑與流量，需根據執行元件的流量需求選擇，以確保流量滿足係統動作要求。此外，還需考慮壓力範圍，確保氣動或液壓係統的工作壓力在閥體的承受範圍內。後是閥芯機能，根據具體需求選擇對應的閥芯機能型號。

安裝時，需確保閥體垂直安裝，若水平安裝則需線圈朝上。管路連接時，螺紋接口需纏繞生料帶或涂抹密封膠，氣動閥排氣口需安裝消聲器，液壓閥回油口需遠離油箱液面。電氣連接時，線圈接線端子需牢固連接，接地端子可靠接地。對於氣動係統，還需在閥前安裝三聯件；對於液壓係統，則需安裝過濾器。日常維護方面，建議每月檢查線圈外觀，每季度清潔閥體並檢查密封件，每年更換一次密封件。

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