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Home > Other > OEM Double port air evacuation valve automatic release air Manufacturer, Factories
OEM Double port air evacuation valve automatic release air Manufacturer, Factories
OEM Double port air evacuation valve automatic release air Manufacturer, Factories
OEM Double port air evacuation valve automatic release air Manufacturer, Factories
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OEM Double port air evacuation valve automatic release air Manufacturer, Factories
OEM Double port air evacuation valve automatic release air Manufacturer, Factories
OEM Double port air evacuation valve automatic release air Manufacturer, Factories

OEM Double port air evacuation valve automatic release air Manufacturer, Factories

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.

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Product Description

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Product Description

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
Double Port Exhaust Valve View
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Characteristics

The structure of the double port exhaust valve is usually composed of a valve body, floating ball, and exhaust nozzle. The floating ball is primarily made of stainless steel, ensuring a long service life, safety, and high reliability.

Exhaust Valve Characteristics
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Core Advantages

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Efficient Exhaust (Core Advantage): Large flow rapid exhaust (main port) allows the pipeline to discharge accumulated gas instantly (up to 150 l/min for DN 100) when filled with water, eliminating air resistance and pressure instability.
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Micro Continuous Exhaust: The auxiliary port works continuously during normal operation to discharge dissolved gases (oxygen, carbon dioxide), maintaining "zero gas resistance" and preventing cavitation.
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Reliable Structure & Long Life: Integrates rapid exhaust, micro exhaust, and negative pressure air replenishment into one unit, replacing multiple devices and reducing potential fault points.
✔
Pure Mechanical Design: No electrical components required. The valve uses adaptive action by floating ball and pressure, offering excellent corrosion and water hammer resistance.
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Material Specifications & Packing

Component Material Options
Body & Bonnet Cast iron HT200 / Stainless steel / Carbon steel
Floating Ball 304 Stainless steel (Vent: H59 Brass)
Sealing Ring NBR
Elastic Screw A3

Packing: Standard export wooden case packaging is utilized to ensure safe transit.

Export Packing
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Main Dimensions

Technical Drawing
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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Frequently Asked Questions

Q1: What is the main function of a double port exhaust valve?
It is designed to rapidly discharge air when a pipeline is being filled and to continuously release micro-bubbles during normal operation to prevent air locks and cavitation.
Q2: Can this valve handle negative pressure?
Yes, the valve integrates negative pressure air replenishment, which helps protect the pipeline from collapsing when internal pressure drops below atmospheric levels.
Q3: What materials are available for harsh environments?
While standard units use Cast Iron, we offer Stainless Steel and Carbon Steel options for the body and bonnet to suit various corrosive or high-pressure environments.
Q4: Does the valve require an external power source?
No, it features a pure mechanical structure. It operates automatically based on the buoyancy of the internal floating ball and system pressure.
Q5: What is the maximum operating temperature?
The valve is designed to operate reliably within a temperature range of -20°C up to 120°C.
Q6: What sealing standard does this valve achieve?
The valve is engineered for "Zero Leakage" performance using high-quality NBR sealing rings and a single-directional sealing design.

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