Caleffi Angled Lockshield - DN15 3/4 - 105-2203
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City Plumbing GBCaleffi Danfoss Dn15 3/4 Angled Lockshield 105-2203
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Product Information
Full details
The Caleffi Angled Lockshield (105-2203) is designed for professional heating engineers and property maintenance specialists who need a reliable, high-performance solution for balancing hydraulic circuits in central heating systems. Its primary benefit is providing precise, long-term flow regulation to radiators, ensuring consistent heat distribution throughout a building. While it is built for durability, users should note that as a lockshield valve, it is intended to be set once during commissioning rather than adjusted frequently by the end-user.
All features
| Model Part Number | 105-2203 |
|---|---|
| Brand | Caleffi |
Extended Product Information
FAQs
Can I use this as a primary radiator shut-off valve?
While it can close flow, it is designed as a balancing valve (lockshield). It is best used for setting the return flow rate.
Is this valve compatible with thermostatic radiator heads?
Yes, the valve body is designed to be compatible with standard thermostatic controllers.
What is the maximum pressure rating for this valve?
The Caleffi 105-2203 is rated for a maximum working pressure of 10 bar.
Can it be used on chilled water systems?
The valve is rated for central heating; please check that your chilled water temperatures do not fall outside the operating parameters.
How do I ensure the valve is set correctly?
Balancing should be performed by measuring the temperature differential across the radiator or using a flow meter during commissioning.
Troubleshooting
Valve is leaking from the adjustment spindle
Gently tighten the packing nut located behind the cap to compress the gland seal.
Radiator remains cold despite valve being open
Check for air trapped in the radiator and bleed it; verify the valve has been opened sufficiently to allow flow.
System noise (whistling) at the valve
The valve is likely causing too much resistance; slightly open the lockshield to reduce flow velocity.
Pros and Cons
Pros
- Durable build quality suitable for commercial applications
- High pressure and temperature tolerance
- Versatile application across radiators, fan coils, and ceilings
- Industry-standard dimensions for easy replacement
Cons
- Requires professional tools for accurate system balancing
- Not intended for frequent manual adjustments
- Specific 3/4 sizing requires compatible pipe fittings
Setup, Compatibility & Care
To install, ensure the pipe threads are clean and free of debris. Use an appropriate sealant or PTFE tape on the threads before securing the valve to the radiator port and pipework. Ensure the angled orientation matches your pipe configuration to avoid stress on the joints. Once installed, use a flat-head screwdriver or the designated adjustment tool to set the flow balance. To maintain the valve, inspect the packing gland periodically for any signs of weeping. The valve requires no lubrication, and the internal components are designed for a long service life under normal water quality conditions. Always verify that your system fluid is free from high concentrations of abrasive debris or chemical additives that could degrade the valve seals.