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Lift check valve

Update: 2016/5/30      View:
  • name:    Lift check valve
  • Type:    H41
  • Presure:    1.0~10MPa
  • Specifications:    DN15~DN500
  • material:    WCB CF8 CF3 CF8M CF3M
  • Order Online
  • Product description

    Lift check valves refers to relying on the media itself, the flow to automatically open and close the valve, by means of the valve clack gravity and fluid pressure automatically to prevent fluid backflow valve, also known as a non-return valve, a one-way valve, a reversing 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 reversal, as well as the release of the container medium. Check valve can also be used to give the pressure may rise to more than the system pressure of the auxiliary system to provide supply pipeline.

  • 主要连接及外形尺寸(PN25)

    公称通径

    主要连接及外形尺寸

    阀体连接尺寸

    法兰连接尺寸

    L

    H

    D

    D1

    D2

    b

    f

    z-Φd

    15

    130

    100

    95

    65

    45

    16

    2

    4-14

    20

    150

    105

    105

    75

    55

    16

    2

    4-14

    25

    160

    120

    115

    85

    65

    16

    2

    4-14

    32

    180

    130

    135

    100

    78

    18

    2

    4-18

    40

    200

    135

    145

    110

    85

    18

    3

    4-18

    50

    230

    149

    160

    125

    100

    20

    3

    4-18

    80

    310

    169

    195

    160

    135

    22

    3

    8-18

    100

    350

    194

    230

    190

    160

    24

    3

    8-23

    150

    480

    255

    600

    250

    218

    30

    3

    8-25

    200

    600

    305

    360

    310

    278

    34

    3

    12-25

    主要连接及外形尺寸(PN40)

    公称通径

    主要连接及外形尺寸

    阀体连接尺寸

    法兰连接尺寸

    L

    H

    D

    D1

    D2

    D6

    b

    f

    f1

    z-Φd

    15

    130

    100

    95

    65

    45

    40

    16

    2

    4

    4-14

    20

    150

    105

    105

    75

    55

    51

    16

    2

    4

    4-14

    25

    160

    120

    115

    85

    65

    58

    16

    2

    4

    4-14

    32

    180

    130

    135

    100

    78

    66

    18

    2

    4

    4-18

    40

    200

    135

    145

    110

    85

    76

    18

    3

    4

    4-18

    50

    230

    149

    160

    125

    100

    88

    20

    3

    4

    4-18

    80

    310

    169

    195

    160

    135

    121

    22

    3

    4

    8-18

    100

    350

    194

    230

    190

    160

    150

    24

    3

    4.5

    8-23

    150

    480

    255

    300

    250

    218

    204

    30

    3

    4.5

    8-25

    200

    600

    305

    375

    320

    282

    260

    38

    3

    4.5

    12-30

    主要连接及外形尺寸(PN64)

    公称通径

    主要连接及外形尺寸

    阀体连接尺寸

    法兰连接尺寸

    L

    H

    D

    D1

    D2

    D6

    b

    f

    f1

    z-Φd

    15

    130

    100

    105

    75

    55

    40

    18

    2

    4

    4-14

    20

    150

    110

    125

    90

    68

    51

    20

    2

    4

    4-18

    25

    160

    125

    135

    100

    78

    58

    22

    2

    4

    4-18

    32

    180

    140

    150

    110

    82

    66

    24

    2

    4

    4-23

    40

    200

    168

    165

    125

    95

    76

    24

    3

    4

    4-23

    50

    230

    170

    175

    135

    105

    88

    26

    3

    4

    4-23

    80

    310

    205

    210

    170

    140

    121

    30

    3

    4

    8-23

    100

    350

    230

    250

    200

    168

    150

    32

    3

    4.5

    8-25

    150

    480

    265

    340

    280

    240

    204

    38

    3

    4.5

    8-34

    200

    600

    310

    405

    345

    300

    260

    44

    3

    4.5

    12-34


    • Main Parts material

      Material code

      Valve body, valve cover

      Valve clack

      Swing arm

      shim

           C

      WCB  carbon steel

      WCB+hard alloy or stainless steel

      WCB  carbon steel

      Graphite+304

           P

      CF8(304) stainless steel

      stainless steel

      CF8(304) stainless steel

      PTFE

           R

      CF8M(316)stainless steel

      stainless steel

      CF8M(316)stainless steel

      PTFE

           I

      WC6 Cr Mo steel

      Alloy steel + hard alloy

      WC6 Cr Mo steel

      Graphite+304

           V

      WC9 Cr Mo steel

      Alloy steel + hard alloy

      WC9 Cr Mo steel

      Graphite+304

      Other special materials, our company can also be tailored to customer needs.

  • Shell material

    Applicable medium

    Applicable temperature(℃)

    Carbon steel(C type

    Water, steam, oil

    425

    Cr.mo.ti steel( type

    Nitric acid

    150

    Cr.ni.mo.ti steel type

    Acetic acid

    150

    Cr.mo. steel( type

    Water, steam, oil

    550

     

    nominal diameter PN(MPa)

    shell(MPa)

    test pressure(MPa)

    up seal(MPa)

    seal(liquid)(MPa)

    seal(gas)(MPa)

    1.6

    2.4

    1.8

    0.6

    1.8

    2.5

    3.8

    2.8

    0.6

    2.8

    4

    6

    4.4

    0.6

    4.4

    6.4

    9.6

    7

    0.6

    7

  • Implementation standards:
    Design standard: GB/T12235
    Structure length: GB/T12221
    Connecting flange: JB/T79, GB/T9113, HG/T20592, HG/T20615
    Experiment and test: JB/T9092, GB/T13927
    Pressure - temperature: GB/T9131
    Product label: GB/T12220
  • Storage and maintenance
    1 the valve must be kept in a dry, ventilated room.
    2 the storage period of the valve, the valve should be closed and fixed, both ends of the flange should be closed.
    3 during the storage of the valve, the surface of the machine is easy to be removed.
    4 long-term storage of the valve should be regularly checked, timely protection.
    Installation and maintenance
    1 the valve is installed in the horizontal pipeline
    2 must be carefully checked before installation, the valve plate is marked and consistent with the requirement and condition.
    3 when installing, should check the inner cavity, remove the valve flap fixing device, try to check the sealing surface of the valve flap, and clean.
    4.. Lifting the valve before, should check whether it has been tightening screw ring.
    5 installation should pay special attention to media flow, should make the normal flow direction of the media and the direction of the arrow on the valve body consistent.
    6 when installing, tighten the connecting bolts evenly and symmetrically.
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