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      Welcome toZhejiang Lange Valve Technology Co., LtdOfficial website!

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      Pneumatic gate valve

      发布日期:[2020-01-07] 点击率:

      Pneumatic gate valve is a low bracket rising stem gate valve with pneumatic actuator (double-layer cylinder with buffer mechanism), manual and its protection mechanism (manual and self-locking pneumatic manual conversion device). Due to the double cylinder structure, the lifting force of the valve is doubled compared with the single cylinder pneumatic gate valve. This fundamentally solves the problem that some valve bodies of single cylinder pneumatic gate valves are wedged and cannot be opened. Moreover, the valve has a buffer mechanism, which can effectively reduce the wear of the sealing surface of the valve plate car and the valve body caused by the downward impact of the piston when the valve is closed, and at the same time, it can avoid the phenomenon that the ram is stuck.

      In order to cooperate with the user to realize the operation automation, the company can provide the cylinder block including the bracket separately in addition to this series of products, so as to help the user to transform the existing manual gate valve of various types. The double cylinder pneumatic actuator part can be installed on the large cover of the valve body of the manual gate valve to form the double cylinder pneumatic manual dual-purpose gate valve.

      Because of its advanced technology, reliable performance, convenient operation, switching and maintenance, it has been widely used as a pipeline opening and closing device for transporting gas and liquid media in petroleum, chemical, metallurgical, electric power, marine and other departments.

      Main performance parameters of pneumatic gate valve nominal pressure: 1.6,2.5.4.0.6.4mpa

      Service temperature: - 29 ~ 425 ℃ (carbon steel) - 40 ~+ 550 ℃ (stainless steel)

      Nominal diameter: dn50-800mm

      Valve body material: 304.306.316l.wcb.ht200

      Connecting flange: JB / t79.gb913.hg20592

      Applicable media: air, water, steam, oil, nitric acid, acetic acid and other corrosive fluids

      Action mode: cut off type, regulating type, manual control

      Power supply voltage: 220VAC, 24VAC

      Input signal: 4-20mA / 1-5vdc

      0~20mA/0~10VDC

      Structure features of pneumatic gate valve 1. The valve is mainly composed of valve body, bonnet, gate, stem, seal ring, double-layer cylinder and its piston, piston rod, diaphragm, buffer mechanism, manual mechanism, pneumatic manual conversion device and bonnet packing device.

      2. When the upper piston moves to the upper end of the stroke, it can push up the upper annunciator to send messages; when the lower piston moves to the lower end of the stroke, it can push down the lower annunciator to send messages, so as to display the opening and closing information of the gate valve on the analog instrument panel in the central operation room.

      3. The rising and falling of the extension indicator bar on the upper part of the hand wheel indicates whether the gate of the valve is in the rising or falling state. When the gate valve is closed, the extension indicator is at z low position; otherwise, when the gate valve is fully open, the extension indicator is at z high position. This is the on-site indication of the opening and closing status of the valve.

      4. The upper part of the cylinder head is equipped with a pneumatic manual conversion device. Turn the transfer handle clockwise to "pneumatic" positioning hole, and the gate valve is in pneumatic operation state; otherwise, turn the transfer handle counterclockwise to "manual" positioning hole, and the gate valve can be operated manually. The change direction of handle with bevel gear is opposite. When the gate valve is operated manually, the hand wheel rotates in the same direction as the ordinary manual valve, i.e. turning clockwise to close and turning anticlockwise to open. The bevel gear rotates in the opposite direction.

      气动闸阀主要零件材质:

      阀体、阀盖、阀板

      铸钢、不锈钢

      阀体及闸板的密封面

      合金钢

      阀杆

      不锈钢

      双头螺栓

      35号钢

      气缸

      20号无缝钢管

      活塞

      铸铝合金

      手动螺母

      青铜

      密封圈

      石棉橡胶板
      缠绕式金属石墨垫片

      活塞环及轴环

      耐油橡胶型圈

      填料函

      石墨石棉绳

      气动闸阀主要连接尺寸和外形尺寸:

      DN

      D

      D1

      D2

      b

      f

      L

      H

      Ds

      D0

      Z-d

      气源接头

      50

      160

      125

      100

      16

      3

      250

      865

      160

      250

      4-18

      M12×1.25

      80

      195

      160

      135

      20

      3

      280

      1100

      160

      300

      8-18

      100

      215

      180

      155

      20

      3

      300

      1200

      160

      350

      8-18

      150

      280

      240

      210

      24

      3

      350

      1380

      219

      400

      8-23

      200

      335

      295

      265

      26

      3

      400

      1580

      273

      400

      12-23

      250

      405

      355

      320

      30

      3

      450

      1710

      273

      400

      12-25

      M20×1.5

      300

      460

      410

      375

      30

      4

      500

      1880

      325

      500

      12-25

      350

      520

      470

      435

      34

      4

      550

      2180

      426

      500

      16-25

      400

      580

      525

      485

      36

      4

      600

      2325

      459

      550

      16-30

      450

      640

      585

      545

      40

      4

      650

      2570

      500

      550

      20-30

      500

      705

      650

      608

      44

      4

      700

      2800

      600

      600

      20-34

      M24×1.5

      600

      840

      770

      718

      48

      5

      800

      3010

      600

      600

      20-41

      M27×1.5


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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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