DAV11 Double Orifice Air Release Valve
Devinsan offers comprehensive air management solutions engineered for high-volume air discharge and pipeline vacuum protection during critical filling and draining cycles. Designed for optimal hydraulic stability and long-term system integrity, these DAV11 Double Orifice Air Release Valve units combine dual-function capability with robust flotation mechanics to meet the complex demands of modern water conveyance networks.
Production Standard
Nominal Dimension (DN)
Nominal Pressure (PN)
Operating Temperature
Design
Connection
Coating
Testing
DN 40 – DN 300
PN 6-PN 10-PN 16-PN 25-PN 40
-30° / +200°
EN 1074 – 4
EN 1092-2 ISO7005-2 Flanged
Electrostatic Powder Epoxy
EN 12266
Application Areas
The DAV11 Double Orifice Air Release Valve is widely used across diverse industrial and commercial sectors, delivering reliable flow control and long‑lasting performance.
1. Water and Wastewater Systems
2. Chemical Industry
3. Food and Beverage Industry
4. Pharmaceutical Industry
5. Oil and Gas Industry
6. HVAC (Heating, Ventilation, Air Conditioning) Systems
In these applications, this DAV11 Double Orifice Air Release Valve ensures precise fluid control, maintains excellent sealing integrity, and supports efficient, safe operation even under demanding conditions.
The DAV11 Double Orifice Air Release Valve is an essential, multi-functional component engineered specifically to manage large volumes of air quickly during pipe filling, continuously vent residual air under pressure, and provide crucial vacuum protection during drainage. Designed to meet the stringent demands of modern infrastructure, this specialized valve ensures peak operational reliability by preventing surge conditions and cavitation damage caused by air/vacuum interactions.
At the core of the DAV11 Double Orifice Air Release Valve is its unique dual-orifice mechanism: a large orifice for bulk air discharge and a small orifice for continuous air release under pressure. When filling the pipe, the large float drops, allowing the large orifice to expel air rapidly. When pressurized, the small float provides continuous, precise venting of smaller air pockets. This combination ensures maximum efficiency during all pipeline stages.
Manufactured from high-strength, corrosion-resistant materials and built with a robust body, the DAV11 Double Orifice Air Release Valve is designed to withstand continuous system pressure and challenging operating environments. Its design ensures a reliable seal under high pressure and allows for secure installation at critical high points in the piping system. The dual functionality significantly enhances hydraulic integrity and provides essential protection against catastrophic pipeline collapse under vacuum conditions.
The DAV11 Double Orifice Air Release Valve is ideally suited for applications in transmission mains, major water distribution trunk lines, and large pumping systems where managing both large initial air volumes and continuous residual air is essential. Its reliable function and comprehensive protection features make it a preferred choice for engineers seeking a high-integrity, standards-compliant solution for long-term pipeline safety and enhanced efficiency.
In summary, the DAV11 Double Orifice Air Release Valve offers an optimal combination of filling/draining capacity, continuous venting, and vacuum protection. With its advanced dual-orifice design, durable construction, and comprehensive air management capability, this unit stands as a trusted solution for modern fluid control and pipeline protection requirements worldwide.
1. General Information
The DAV11 Double Orifice Air Release Valve is designed for the high-volume evacuation and continuous removal of air from both filling and pressurized systems. Proper installation is essential to guarantee safe operation, long service life, and sustained hydraulic efficiency.
2. Safety Precautions
Installation must be performed by qualified personnel only.
Ensure strict compliance with all local safety regulations and standards concerning working with high-pressure pipelines and large-volume fluid control.
Wear appropriate personal protective equipment (PPE).
Confirm that the pipeline section is fully depressurized and isolated before attempting to install the DAV11 Double Orifice Air Release Valve.
3. Pre-Installation Checklist
Inspect the DAV11 Double Orifice Air Release Valve for any visible damage during transport or storage, paying attention to both the small and large float mechanisms and their respective seats.
Check that the valve type, size, and pressure rating match the system requirements.
Verify that the valve interior is clean and free from debris that could interfere with float movement or sealing.
Confirm that the mating pipe connection (e.g., flange or thread) is clean and properly aligned. Ensure sufficient space is available above the valve for vertical installation and future maintenance access.
4. Installation Procedure
Positioning: Install the DAV11 Double Orifice Air Release Valve vertically, generally at the highest points of the pipeline profile and at strategic points (e.g., long horizontal runs) where air naturally collects. The valve must be installed with the inlet facing upward to ensure both floats operate correctly.
Use the appropriate sealing materials (e.g., gaskets, thread sealant) suitable for the medium and operating conditions.
Align the valve precisely with the pipe connection and secure it firmly. Avoid overtightening threaded connections, which could damage the valve body.
5. Post-Installation
Slowly introduce fluid and pressurize the system, monitoring the rapid air release from the large orifice during the initial filling stage. Monitor the valve to ensure the large float rises and seals the large orifice completely once the liquid reaches it. Record the installation details, date, and final notes for documentation purposes.
Proper maintenance extends the service life of the DAV11 Double Orifice Air Release Valve and ensures reliable air discharge, pipeline protection, and vacuum control. Follow the guidelines below to maximize the longevity of this essential unit.
1. Routine Operation
Visually inspect the DAV11 Double Orifice Air Release Valve exterior regularly (e.g., monthly) for signs of external leakage from either orifice or connection points. Listen for any continuous hissing sound, which may indicate a failed seal on the small orifice, requiring immediate attention.
2. Inspection Schedule
Monthly, check the area surrounding the valve for any signs of fluid spray or leakage.
Quarterly, check the cleanliness of the valve inlet passage to ensure no fouling is restricting air or water flow into the chamber.
Annually, perform an internal inspection by removing the cover to check the condition of both the small and large floats, their lever mechanisms, and the orifice seals.
3. Lubrication
The internal components and float mechanisms of the DAV11 Double Orifice Air Release Valve operate freely within the fluid and are designed to be maintenance-free. No external lubrication is required for the internal components.
4. Seal and Gasket Replacement
Replace the cover gasket and orifice seals immediately if persistent external or internal leakage is observed. The float mechanisms should only be replaced if the valve fails to seal completely or fails to open during air/vacuum events. Always isolate the valve and depressurize the section of the pipeline thoroughly before attempting any maintenance work requiring cover removal.
5. Cleaning
Keep the exterior of the DAV11 Double Orifice Air Release Valve clean to prevent surface corrosion. The small orifice hole may require occasional cleaning to ensure no particles block the continuous air exit path.
6. Storage and Spare Parts
Store spare parts (gaskets, orifice pins, floats) in a dry, clean, and cool environment, away from direct sunlight and temperature extremes. Maintain a detailed record of all inspections, internal part replacements, and repairs performed on the DAV11 Double Orifice Air Release Valve unit.
We prioritize quality at every stage of production to deliver durable, safe, and efficient products. Our continuous improvement and strict quality controls keep us at the forefront of the industry.
Our certifications prove our commitment to excellence and compliance with international standards, ensuring the safety and reliability of our products worldwide.
We continuously invest in innovation and quality to expand our certifications and meet evolving industry needs.
Frequently Asked Questions about the DAV11?
What are the main advantages of this valve?
The DAV11 Double Orifice Air Release Valve offers superior protection by managing both large volume air expulsion during filling and continuous venting of smaller air pockets under pressure, which single orifice valves cannot handle effectively.
Why should I choose this product?
This valve delivers outstanding performance in both sealing and durability, making it a dependable choice for demanding applications. Its straightforward design facilitates easy installation, offering flexibility during system design. With a wide range of material options, it meets the needs of various infrastructure projects, from municipal water networks to industrial facilities.
How does the DAV11 Double Orifice Air Release Valve provide vacuum protection?
When the pipeline pressure drops below atmospheric pressure (creating a vacuum), the lack of fluid in the chamber causes both the small and large floats to drop, rapidly opening both orifices to allow large volumes of air back into the pipe, preventing pipe collapse.
When should the large orifice be operational?
The large orifice is primarily operational in two scenarios: during the initial filling of the pipeline (rapid air expulsion) and during pipe drainage or a break, when large volumes of air need to enter the system to prevent vacuum collapse.
How does the double orifice mechanism enhance pipeline safety?
The mechanism enhances safety by ensuring that air is managed at all stages: bulk air is removed quickly, residual air is vented continuously, and air is admitted instantly during low-pressure events, protecting the pipe wall integrity against severe pressure imbalances.
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