最好最新高清中文字幕电影

<i id="xpvfl"></i>
<object id="xpvfl"></object>
<i id="xpvfl"><option id="xpvfl"><listing id="xpvfl"></listing></option></i>

<optgroup id="xpvfl"></optgroup>
    <optgroup id="xpvfl"><del id="xpvfl"></del></optgroup>

      <thead id="xpvfl"><tt id="xpvfl"><video id="xpvfl"></video></tt></thead><i id="xpvfl"><option id="xpvfl"><listing id="xpvfl"></listing></option></i>
        <thead id="xpvfl"><tt id="xpvfl"></tt></thead>

        <object id="xpvfl"></object>

        <th id="xpvfl"></th>

        Vertical check valve

        Location:Home > Vertical check valve

        Stainless steel vertical flange check valve H42W

        Date:[2016-10-19]    hits: Stainless steel vertical flange check valve H42W

        Stainless steel vertical flange check valve H42W

        Stainless steel vertical check valve is to rely on the flow of the media itself and automatically open and close the valve flap, used to prevent the media back valve, also known as check valve, check valve, counterflow valve, and back pressure valve. Check valve is an automatic valve, its main role is to prevent the media back, to prevent the pump and drive motor reverse, and the container media release. The check valve may also be used on a line in which the supply pressure of the auxiliary system may be increased beyond the system pressure. Check valve can be divided into swing check valve (according to the center of gravity rotation) and the lift check valve (along the axis of movement).


        This type of valve works by allowing only the medium to flow in one direction and to prevent directional flow. Usually this valve is automatically working, in a direction under the action of fluid pressure, disc open; flow

        Stainless steel vertical check valve body in the opposite direction of flow, by the fluid pressure and the valve flap valve self-acting on the valve seat, which cut off the flow.

        One internal thread check valve, butterfly check valve belongs to this type of valve, which includes swing-type check valve and lift check valve. Swing check valve has a hinge mechanism, as well as a door like the valve flap free to lean against the inclined seat surface. In order to ensure that the valve flap to reach the seat surface each time the appropriate position, the valve flap design in the hinge so that the valve flap has enough space to open space, and the valve real, full contact with the valve seat. The valve flap can be made entirely of metal, or it can be covered with leather, rubber, or a synthetic cover, depending on the performance requirements. Swing check valve in the fully open condition, the fluid pressure is almost unimpeded, so the pressure drop through the valve is relatively small. Lift check valve valve seat is located on the valve seat sealing surface. The valve in addition to the valve can be free to lift, the rest of the same as the cut-off valve, the fluid pressure from the valve seat sealing surface lift up, the media return valve leading to the valve seat down and cut off the flow. Depending on the conditions of use, the valve flap may be of the all-metal construction, or may be in the form of a rubber pad or rubber ring mounted on the valve disc holder. Like the cut-off valve, the passage of fluid through the lift check valve is narrow, so the pressure drop through the lift check valve swing larger than the swing check valve, and the flow of swing check valve is limited Very little.

        A, stainless steel vertical check valve according to its structure and installation can be divided into:

        1, stainless steel vertical check valve disc was disc-shaped, around the seat axis of the axis of rotation, because the valve channel into a streamlined, flow resistance than the butterfly check valve is small, suitable for low flow and flow Do not often change the large-caliber occasion, but not suitable for pulsating flow, the sealing performance is less than lift type. Butterfly check valve is divided into single-valve type, double-valve type and more than three types, these three forms are mainly divided by the valve caliber, the purpose is to prevent the media stop flow or back flow, weakening the hydraulic shock.

        2, stainless steel vertical check valve: valve flap sliding along the vertical centerline of the check valve, muffler check valve can only be installed in the horizontal pipeline, high-pressure small-caliber check valve disc can be used on a round ball. Muffler check valve body shape and the same stop valve (with the cut-off valve common), so it's fluid resistance coefficient. The structure and cut-off valve is similar to the valve body and the valve with the same stop valve. The upper part of the valve flap and the lower part of the valve cover are processed with a guide sleeve. The valve flap can be freely lifted and lowered in the valve guide. When the medium is downstream, the valve flap is opened by the medium thrust. When the medium stops flowing, Dropping down on the valve seat, from the media to prevent backwash effect. The inlet and outlet channel of the straight-type butterfly check valve is perpendicular to the direction of the seat channel. The vertical lift-type check valve has the same direction of the medium inlet and outlet channel as the valve seat channel, and its flow resistance is smaller than the straight-through type.

        3, stainless steel vertical check valve: valve around the valve seat within the pin rotation of the check valve. Disc check valve is simple, can only be installed in the horizontal pipe, sealing better.

        4, stainless steel vertical check valve: valve flap sliding along the centerline of the valve body. Pipeline check valve is an emerging valve, its small size, light weight, processing technology is good, is one of the development direction of the check valve. But the fluid drag coefficient is slightly larger than the swing check valve.

        5, compression-type check valve: This valve is used as boiler feed water and steam cut off valve, it has a lift check valve and stop valve or angle valve integrated function.

        In addition, there are some not applicable to the installation of the pump outlet check valve, such as the bottom valve, spring type, Y type and other check valves.

        B, stainless steel vertical check valve uses and performance specifications:

        The valve for industrial pipe to prevent the flow of media back to the device.

        Design and manufacturing

        GB/T12235

        Connection end dimensions

        Structure length

        GB/T12221

        Flange dimensions

        JB/T79

        Inspection and testing

        JB/T9092

        material

        Carbon steel

        GB/T12229

        stainless steel

        GB/T12230

        alloy steel

        Q/ZB66

        Logo

        GB/T12220

        Availability

        JB/T7928


        model

        Nominal

        pressure


        test pressure

        Operating temperature(℃)

        strength

        (water)

        Mpa

        seal

        (Water) air

        (Mpa)

        Low pressure seal

        (air)

        Mpa

        H42W-16

        1.6

        2.4

        1.8

        0.6

        ≤200

        H42W-25

        2.5

        3.8

        2.8

        0.6

        ≤200

        H42W-40

        4.0

        6.0

        4.4

        0.6

        ≤200


         Main connection dimensions and dimensions


        Model

        DN

        size(mm)

        L

        D

        D1

        D2

        H

        b

        Z-Φd

        H42W-16

        15

        130

        95

        65

        45

        77

        14

        4-14

        20

        150

        105

        75

        55

        77

        14

        4-14

        25

        160

        115

        85

        65

        80

        16

        4-14

        32

        180

        135

        100

        78

        85

        16

        4-18

        40

        200

        145

        110

        85

        95

        16

        4-18

        50

        230

        160

        125

        100

        105

        16

        4-18

        65

        290

        180

        145

        120

        120

        18

        4-18

        80

        310

        195

        160

        135

        130

        20

        8-18

        100

        350

        215

        180

        155

        140

        20

        8-18

        125

        400

        245

        210

        185

        155

        22

        8-18

        150

        480

        280

        240

        210

        180

        24

        8-23

        200

        600

        335

        295

        265

        215

        26

        12-23

        H42W-25

        15

        130

        95

        65

        45

        77

        16

        4-14

        20

        150

        105

        75

        55

        80

        16

        4-14

        25

        160

        115

        85

        65

        85

        16

        4-14

        32

        180

        135

        100

        78

        95

        18

        8-18

        40

        200

        145

        110

        85

        105

        18

        8-18

        50

        230

        160

        125

        100

        120

        20

        8-18

        65

        290

        180

        145

        120

        130

        212

        8-18

        80

        310

        195

        160

        135

        140

        22

        8-18

        100

        350

        230

        190

        160

        155

        24

        8-23

        125

        400

        270

        220

        188

        180

        28

        8-25

        150

        480

        300

        250

        218

        215

        30

        8-25

        200

        600

        360

        310

        278

        973

        34

        12-2

        The previous message:H42Y, H42W-type vertical lift check valve
        The next message:Vertical check valve

        Related Information

        Mobile site

        App

        最好最新高清中文字幕电影

        <i id="xpvfl"></i>
        <object id="xpvfl"></object>
        <i id="xpvfl"><option id="xpvfl"><listing id="xpvfl"></listing></option></i>

        <optgroup id="xpvfl"></optgroup>
          <optgroup id="xpvfl"><del id="xpvfl"></del></optgroup>

            <thead id="xpvfl"><tt id="xpvfl"><video id="xpvfl"></video></tt></thead><i id="xpvfl"><option id="xpvfl"><listing id="xpvfl"></listing></option></i>
              <thead id="xpvfl"><tt id="xpvfl"></tt></thead>

              <object id="xpvfl"></object>

              <th id="xpvfl"></th>