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        Pressure/Vacuum valve (Basical structure)


         

         

        The dimension parameter of the CF-ISO high-velocity relief valve

        No.

        DN

        D1

        D2

        D3

        L

        H

        Assembly hole

        8

        250

        320

        350

        395

        460

        730

        12x∮22

        7

        200

        258

        295

        340

        455

        730

        8x∮18

        6

        150

        202

        225

        265

        385

        670

        8x∮18

        5

        125

        178

        200

        240

        380

        545

        8x∮18

        4

        100

        148

        170

        210

        285

        485

        4x∮18

        3

        80

        128

        150

        180

        285

        460

        4x∮18

        2

        65

        110

        130

        160

        255

        410

        4x∮14

        1

        50

        90

        110

        140

        255

        410

        4x∮14


         Remarks:flange executive standards:GB2501-89,DN50-DN150, nominal pressure is 0.6Mpa; DN200、DN250, nominal pressure is 1.6Mpa(is equal to ISO2084-1974、ISO2441-1975)。

         

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