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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.

    • 主要連接及外形尺寸(PN25)

      公稱通徑

      主要連接及外形尺寸

      閥體連接尺寸

      法蘭連接尺寸

      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

      主要連接及外形尺寸(PN40)

      公稱通徑

      主要連接及外形尺寸

      閥體連接尺寸

      法蘭連接尺寸

      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

      主要連接及外形尺寸(PN64)

      公稱通徑

      主要連接及外形尺寸

      閥體連接尺寸

      法蘭連接尺寸

      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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