隔膜閥的關閉與開啟是通過來自管路的壓力作用于增強橡膠隔膜實現的。
當壓力介質進入閥門控制腔，隔膜下壓，關閉閥門通道，當控制腔壓力排向大氣或下游管道，隔膜上升，閥門通道被打開。
閥門沒有閥桿、密封墊、定向座等，通道中運動的*部件就是隔膜，所以不存在銹蝕及抱死現象，具有更高的穩定性。
多種結構形式及控制形式，可適用于多種的流體控制需要。
型號 | 44 | 45 | 47 | 53 | 67 | 77 | 82 | 84 | 87 | 91 | 94 | 75 | 95 | 96 |
連接方式 | 螺紋 | 螺紋 | 法蘭 | 管卡 | 法蘭 | 法蘭 | 法蘭 | 螺紋 | 法蘭 | 螺紋 | 螺紋 | 螺紋 | 螺紋 | 熔焊 |
材質 | 鑄鐵 | 銅 | 鑄鐵 | 鑄鐵 | 球墨鑄鐵 | 球墨鑄鐵 | 鑄鐵 | 鑄鐵 | 銅 | 銅 | 球墨鑄鐵 | 工程塑料 | UPVC塑料 | UPVC塑料 |
口徑mm |
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20 |
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25 |
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32 |
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40 | ● | ● |
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50 | ● | ● | ● | ● | ● | ● |
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65 | ● | ● |
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80 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● |
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90 |
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100 |
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110 |
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150 |
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160 |
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200 |
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250 |
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300 |
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350 |
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400 |
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500 |
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600 |
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