■ Main technical parameter of Vacuum Butterfly Valve / Vacuum Valve
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Type
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DK941X-2.5C
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DS9D41X-2.5C
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Nominal pressure
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0.25
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0.25
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Test pressure
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Strength testing
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0.4
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0.4
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Seal testing
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0.275
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0.275
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Working pressure
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0.25
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0.25
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Applicable medium
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Non-causticity saturated water vapour
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Applicable temperature
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≤120
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≤200
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Vacuum leakage coefficient
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≤6.67×10-2PaM3S-1
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Flange connection dimension standard
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GB25555～2556-81
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Pressure testing standard
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GB/T13927-92
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■ Main accessory
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Accessory name
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Body & disc
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Stem, seat
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Seal ring
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Material
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Q235-A, F armor plate
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2Cr13, 1Cr18Ni9Ti
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EPDM, Fl rubber
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