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      Welcome toZhejiang Lange Valve Technology Co., LtdOfficial website!

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      Knife gate valve

      发布日期:[2020-01-07] 点击率:

      Knife gate valve can be driven by sprocket, manual, worm gear, pneumatic, hydraulic and electric. The connection mode can be flange and clamp. The structural form can be round, lug and plum blossom. The sealing structure can be soft seal and hard seal. The pressure range is pn0.1-32mpa. The nominal diameter is dn15-700mm. The material can be cast iron, cast steel and stainless steel.

      Introduction to knife gate valve:

      Knife gate valve, also known as knife gate valve, is widely used in papermaking, petrochemical, mining, drainage, food and other industries due to its good shearing effect, suitable for slurry, powder, fiber and other uncontrollable fluids. Knife gate valve has a variety of seats to choose from, and can be equipped with electric or pneumatic actuators according to the needs of field control, to achieve the automatic operation of the valve.

      Application scope of knife gate valve:

      Knife gate valve is suitable for slurry, powder, fiber and other difficult to control fluid, widely used in papermaking, petrochemical, mining, drainage, food and other industries.

      Structure features of knife gate valve:

      1. The opening and closing parts of knife gate valve are the gate, the movement direction of the gate is perpendicular to the direction of the fluid, and the knife gate valve can only be fully opened and closed, not be adjusted and throttled.

      2. The ram has two sealing surfaces. The wedge and wedge angle formed by the two sealing surfaces of the commonly used mode gate valve vary with the valve parameters, usually 50. The wedge-shaped knife gate valve RAM can be made into a whole, which is called rigid ram. It can also be made into a ram that can produce slight deformation, so as to improve its processability and make up for the deviation caused by the angle of the sealing surface during the processing. This kind of gate The plate is called an elastic ram.

      3. When the knife gate valve is closed, the sealing surface can only be sealed by the medium pressure, that is to say, the sealing surface of the gate valve is pressed to the seat on the other side by the medium pressure to ensure the sealing of the sealing surface, which is self sealing. Most knife gate valves adopt forced sealing, that is to say, when the valve is closed, the gate shall be forced against the valve seat by external force to ensure the sealing of the sealing surface.

      Standard Specification for knife gate valves:

      Design and manufacturing standards:

      Structural length standard: GB / T 12221-2005

      Standard of connecting flange: GB / T 9113

      Pressure and temperature rating: GB / T 12224-2005

      Test and inspection standard: GB / T 13927-2008


      刀型闸阀主要性能规范:

      公称压力(MPa)

      壳体试验(MPa)

      密封试验(MPa)

      工作温度

      适用介质

      1.0
      1.6

      1.5
      2.4

      1.1
      1.8

      100
      100

      纸浆、污水、煤浆、灰、渣水混和物

      刀型闸阀主要零部件材质:

      体、盖

      闸阀

      阀杆

      密封面

      不锈钢、碳钢、灰铸铁

      碳钢、不锈钢

      不锈钢

      橡胶、四氟、不锈钢、硬质合金

      刀型闸阀主要外形及连接尺寸:

      MPa

      DN

      L

      D

      D1

      D2

      H

      N-M

      D0

      1.0

      50

      43

      160

      125

      100

      330

      4-M16

      180

      65

      46

      180

      145

      120

      360

      4-M16

      180

      80

      46

      195

      160

      135

      390

      4-M16

      220

      100

      52

      215

      180

      155

      440

      8-M16

      220

      125

      56

      245

      210

      185

      510

      8-M16

      230

      150

      56

      280

      240

      210

      600

      8-M20

      280

      200

      60

      335

      295

      265

      700

      8-M20

      360

      250

      68

      390

      350

      320

      840

      12-M20

      360

      300

      78

      440

      400

      368

      960

      12-M20

      400

      350

      78

      500

      460

      428

      1110

      16-M20

      400

      400

      102

      565

      515

      482

      1250

      16-M22

      400

      450

      114

      615

      565

      532

      1380

      20-M22

      530

      500

      127

      670

      620

      585

      1530

      20-M22

      530

      600

      154

      780

      725

      685

      1800

      20-M27

      600

      700

      165

      895

      840

      800

      2150

      24-M27

      600

      800

      190

      1010

      950

      898

      2420

      24-M30

      680

      900

      203

      1110

      1050

      1005

      2680

      28-M30

      680

      1000

      216

      1220

      1160

      1115

      3100

      28-M30

      700

      1200

      254

      1450

      1380

      1325

      3450

      32-M36

      800

      1.6

      50

      43

      160

      125

      99

      330

      4-M16

      180

      65

      46

      185

      145

      120

      360

      4-M16

      180

      80

      46

      200

      160

      135

      390

      8-M16

      220

      100

      52

      220

      180

      155

      440

      8-M16

      220

      125

      56

      250

      210

      185

      510

      8-M16

      230

      150

      56

      285

      240

      210

      600

      8-M20

      280

      200

      60

      340

      295

      265

      700

      12-M20

      360

      250

      68

      405

      355

      310

      840

      12-M22

      360

      300

      78

      460

      410

      375

      960

      12-M22

      400

      350

      78

      520

      470

      435

      1110

      16-M22

      400

      400

      102

      580

      525

      485

      1250

      16-M27

      400

      450

      114

      640

      585

      545

      1380

      20-M27

      530

      500

      127

      715

      650

      609

      1530

      20-M30

      530

      600

      154

      840

      770

      720

      1800

      20-M36

      600

      700

      165

      910

      840

      788

      2150

      24-M36

      600

      800

      190

      1025

      950

      898

      2420

      24-M36

      680

      900

      203

      1125

      1050

      998

      2680

      28-M36

      680

      1000

      216

      1255

      1170

      1110

      3100

      28-M42

      700

      1200

      254

      1485

      1390

      1325

      3450




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      Copyright ? 2015 Zhejiang Lange Valve Technology Co., Ltd All Rights Reserved.

      Address: Oubei Dongou Industrial Park, Yongjia County, Zhejiang Province

      Tel: 0577-67378122 67972858 Fax: 0577-67378155 67972856 website:www.trwwoodworks.com

      Main products: all metal hard seal butterfly valve, all metal two-way pressure butterfly valve

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