Danfoss AVDO20 Bypass Valve - 22mm
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eBayDanfoss 003L6122 Auto By-Pass Valve AVDO 20, 22mm Constant Flow Control - NEW
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City Plumbing GBDanfoss Avdo20 Bypass Valve 22Mm 003L612200
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Product Information
Full details
The Danfoss AVDO20 Bypass Valve is designed for heating systems requiring consistent water circulation, particularly when mandated by boiler manufacturers. Its primary benefit is ensuring a minimum flow through the system, protecting the boiler and improving overall system stability, even under varying load conditions. A potential caveat is its specific application and the need for correct installation to achieve optimal performance. Key features include its dual functionality as either a differential pressure control or a minimum flow regulator.
All features
| Model Part Number | 003L612200 |
|---|---|
| Brand | Danfoss |
Extended Product Information
FAQs
What is the main purpose of the Danfoss AVDO20 valve?
The AVDO20 valve is designed to ensure a minimum flow rate through a heating system or to control differential pressure, which is often required by boiler manufacturers for optimal operation and longevity.
Do I need a professional to install this valve?
Yes, professional installation by a qualified heating engineer is highly recommended to ensure correct placement, orientation, and integration into your existing heating system.
What size pipe does the AVDO20 valve connect to?
The AVDO20 valve is designed for 22mm pipework.
Can this valve be used in any heating system?
It is primarily intended for hydronic heating systems where maintaining a minimum flow or controlling differential pressure is beneficial or required, especially with modern condensing boilers.
Does the valve require regular maintenance?
No, the Danfoss AVDO20 is designed to be maintenance-free under normal operating conditions.
What happens if the valve is installed incorrectly?
Incorrect installation can lead to ineffective system operation, potential overheating or under-circulation issues, and may not provide the intended boiler protection or pressure control.
Troubleshooting
No flow through bypass even when system demands it
Verify installation is across correct points in the system (e.g., flow and return of boiler). Check for blockages in the heating system. Ensure the valve is correctly oriented as per installation guide.
Excessive noise from the valve
This may indicate high differential pressure. Check system pump settings or consider if the bypass is correctly sized for the application. Ensure correct installation on the return side.
Valve is constantly open, allowing too much flow
Confirm the valve is installed correctly and that there is adequate differential pressure across it. Check for any debris that might be preventing it from closing properly. System pressure or pump settings may need adjustment.
Pros and Cons
Pros
- Ensures minimum flow for boiler protection.
- Adapts to varying system loads.
- Supports stable heating system operation.
- Simple integration into 22mm pipework.
- Complies with many boiler manufacturer requirements.
Cons
- Requires correct installation for optimal function.
- Primarily suited for specific system bypass requirements.
- May require system adjustments for precise differential pressure control.
- Not suitable for all types of fluid systems.
Setup, Compatibility & Care
Setup: The AVDO20 valve should be installed in the return pipework of the heating system, typically across the flow and return of the boiler or a specific circuit. Ensure the valve is oriented correctly according to the manufacturer's installation diagram. It is crucial to connect it into a section of pipe where a differential pressure can be established or where minimum flow needs to be maintained. Professional installation by a qualified heating engineer is recommended.
Compatibility: This valve is designed for hydronic heating systems. The 22mm connection size is standard for many domestic and light commercial heating installations. It is compatible with water-based heating fluids. Ensure the system pressure and temperature are within the valve's operational limits.
Care: The AVDO20 is a maintenance-free valve designed for long service life. No regular servicing is typically required. However, it is good practice to periodically check the heating system for leaks and ensure overall system performance. If the valve appears to be malfunctioning, it may indicate an issue with the overall system design or installation rather than the valve itself.