4安全閥是直接依靠介質壓力產生的作用力來克服作用在閥瓣上的機械載荷使安全閥開啟的,作用在閥瓣上的機械載荷主要來自重錘或彈簧,這種幾乎是固定的機械載荷。要想保證安全閥的密封性能,必須閥座密封面和閥瓣密封面的平整度和表面粗糙度有嚴格的要求。 以彈簧式安全閥為例: 工作原理應該是壓力=壓強X面積。壓力就是彈簧的壓力,面積就是密封面的面積。當作用在密封面上的壓強乘以密封面的面積形成的向上的推力大于彈簧的壓力,彈簧被壓縮,密封面打開,將壓力通過泄壓孔排出。
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DPZO-T-271-L5伺服比例閥 DPZO-T-271-L5比例閥
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DPZO-T-273-S5/D DPZO-T-273-S5/D伺服比例閥 DPZO-T-273-S5/D比例閥
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DPZO-A-271-L5/D 30 DPZO-A-271-L5/D
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DPZO-A-271-L5/E 30 DPZO-A-271-L5/E 30伺服比例閥
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