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    Composite Exhaust Air Valve

    DN:DN50—DN200
    Nominal pressure (MPa): PN1.0—1.6Mpa
    Medium: Fresh water, sewage, sea water, weak acid,weak base etc
    Temperature: -20℃—120℃
    Body material: cast iron, ductile iron
    Flange connection: DIN PN10.PN16, ANSI150,BS4504


    Categories

    Tel: +86-18539246853
    Fax: +86-371-55883235
    E-mail: weisidun@wsdvalve.com
    Address: ZhengZhou,HeNan,China.

     

    Product Introduction

    This product is used at the highest point of pipelines, the place where air is shutoff, or the outlets of pumps in order to eliminate air and dredge pipelines. If the vent valve is not set, the air in the pipeline will be possibly shutoff at any time, and the water content will not meet the design requirement. If the electricity is suddenly cut off when the pipeline is at work, the negative pressure in the pipeline will cause vibration or cracking. In this case, the vent valve can quickly inhale air into the pipeline and prevent the vibration and cracking of it.

     

    Operation Principle

    There are two holes in the compound vent valve, one big, one small. The diameter nearly equals DN. The first time water is passed in the pipeline, a large amount of air will be released through the big hole. Immediately the air is completely removed, the big hole stops working. When the pipeline is at work, air cells will be generated. And air cells will grow bigger while move to the upper part of the pipeline, which will have a negative influence on the flow of water. At this moment, these air cells can be removed through the small hole. Therefore no air can exist in the pipeline. When the electricity is cut off, the pump does not work , or there is no water flow in the pipeline, negative pressure will be generated and there will be a great need of air in the pipeline. In order to inhale a lot of air, a floating ball will fall and open the small hole which will drive the opening of the big hole.

     

    Warning:The working pressure of vent valve cannot be over 0.02MPa, if not, water will be leaked. And this valve should be equipped with another valve for its maintenance.

     

     

    Parameters

    Technical Parameters

     

    1.Working pressure:1.0MPa

    2.Medium: water

    3.Applicable temperature:constant temperature

    4.Body:gray iron HT200

    5.Floating ball and piston: stainless steel

    6.Packing material:ding clear rubber

     

     

    CARX type dimensions

     

    DN(mm)

    D

    D1

    D2

    L

    L1

    H

    Z-Φ d

    25

    115

    85

    65

    235

    180

    355

    4-14

    50

    160

    125

    102

    325

    205

    450

    4-18

    80

    195

    160

    138

    365

    235

    500

    4-18

    100

    215

    180

    158

    385

    258

    535

    8-18

     

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