SUN閥產自美國，其閥的種類可分為：插式閥，平衡閥，泄壓閥，順序閥，單向閥，分流閥，方向閥，電磁閥，邏輯閥，梭閥，回路節省閥，等等。?

sun閥的特點

　　SUN插式閥最顯著的優點，在于其閥尾端的自由浮動，籍此其緊密配合的工作組件，可在閥體內浮動，減少其對安裝扭矩的敏感度以及避免其內部活動組件卡住的可能。清潔或檢查插式閥，不必改變閥的即有設定或拆卸任何配管。SUN插式閥內部工作組件，均經熱處理，加工耐磨，耐撞擊，抗疲勞，使用壽命長。?

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SUN插式閥插孔的獨特考慮

　　為確保閥的可靠性，SUN插式閥插孔考慮了：1螺紋肩部外徑可將閥導入插孔，確保對心。2自由浮動部承合插式閥尾端與插孔間的偏心度。3?SUN插式閥浮動式的設計允許較高的安裝扭矩，使閥更能確實上緊避免松動或漏油。4肩部平口起止進作用，承受螺紋造成的負載，避免產生任何負荷或導致插式閥變形，確保中心線的對正。5將螺紋置于中位使閥獲得最大的流量能力減少偏心度的影響，并將螺紋負載分布于油路板的深層。6插孔底部的止進部撐持閥的浮動部，而組裝鐵線僅用于閥之組合。7?SUN油口的一致性，使設計有較大的靈活性以及減少油路板的刀具的需求。

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