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Double port air evacuation valve automatic release air
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Double port air evacuation valve automatic release air

Type:Flanage type

Series:QB2-10/16

Size: DN40-DN300/2”-12”

Pressure rating: PN6/PN10/PN16/PN25

Design standard: BS/API/DIN/JIS

Service: OEM&ODM

The double port exhaust valve is a high-performance floating ball exhaust valve, the core of which is to cope with a large amount of exhaust and a small amount of exhaust respectively through two independent exhaust ports, and has the function of negative pressure air replenishment.

Application Scenarios

The double port air evacuation valve is mainly used for the highest point of municipal water supply, heating and ventilation, fire protection and other pressure pipelines, rapid exhaust, continuous exhaust of excess gas and negative pressure air replenishment, to ensure smooth and safe operation of pipelines.

    Valve Type:

    Exhaust valve

    Structure:

    Double port

    Standard:

    BS/API/DIN/JIS

    Workmanship:

    Investment casting

    Sealing direction:

    Single-directional

    Sealing grade:

    Zero leakage

    Temperature:

    -20°C<T<120°C

    Operation:

    Self-starting

    Snipaste_2026-04-01_09-39-03

    Characteristics

    The structure of double port exhaust valve is usually composed of valve body, floating ball, exhaust nozzle, etc. the floating ball is mostly stainless steel, with long service life, safety and reliability

    Characteristics

    Advantages

    1.Efficient exhaust under all working conditions (the core advantage)

    Large flow rapid exhaust (main port): when the pipeline is filled with water and started, the main exhaust port is fully opened to instantly discharge the accumulated gas in the pipeline (up to 150 l/min for DN 100), completely eliminate the air resistance, quickly improve the efficiency of water delivery/heating, and avoid flow attenuation and pressure instability.

    Micro continuous exhaust (auxiliary port): when the system is running normally, the auxiliary port (micropore) works for a long time to automatically discharge the dissolved gas (oxygen, carbon dioxide) continuously precipitated from the water, eliminate the formation of gas plug and cavitations after long-term operation, and maintain the "zero gas resistance" and efficient operation of the pipeline.

     

    2.Reliable structure and long service life

    One valve dual function: it integrates "rapid exhaust, micro exhaust and negative pressure air replenishment", replaces the two sets of devices of single port exhaust valve+air replenishment valve, and reduces installation points and fault points.

    Pure mechanical structure: no electrical components, adaptive action by floating ball and pressure, corrosion resistance, water hammer resistance, outdoor/humid/high temperature environment, very low failure rate.

    Packing

    Standard export wooden case packaging

    Packing

    Material

    Body,bonnet

    Cast iron HT200/
    Stainless steel/Carbon steel

    Floating ball

    304 Stainless steel
    Vent:H59Steel H59 brass

    Sealing ring

    NBR

    Elastic screw

    A3

    Main dimensions

    Dimension

    Model

    DN(mm)

    Main dimensions (mm)

    D

    D1

    D2

    L

    Z-Φd

    QB2-10

    40

    145

    110

    85

    430

    4-Φ18

    50

    160

    125

    100

    430

    4-Φ18

    75

    195

    160

    135

    470

    4-Φ18

    100

    215

    180

    155

    500

    4-Φ18

    150

    280

    240

    210

    540

    8-Φ20

    200

    335

    295

    265

    700

    8-Φ20

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