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City Plumbing GB£20.28Visit shop Caleffi Danfoss Dn15 1/2 Angled Lockshield 105-1503
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The Caleffi Angled Lockshield Valve (105-1503) is an essential component for HVAC technicians and property owners seeking precise, long-term flow regulation in hydronic heating systems. Designed for use in radiators, heated ceilings, and fancoil units, it offers robust construction that ensures consistent temperature management. While it excels at balancing hydronic loops, users should note that as a lockshield valve, it is intended for initial system commissioning rather than frequent adjustment by end-users.
| Model Part Number | 105-1503 |
|---|---|
| Brand | Caleffi |
It is used to balance the heating system by restricting the flow of water to specific radiators to ensure even heat distribution across the property.
Yes, this valve is designed to be compatible with both manual operators and thermostatic controllers.
It is a DN15 valve, which is the standard size for 1/2 inch piping used in most radiator systems.
Yes, it is rated for a maximum working temperature of 100C.
Remove the protective cap to expose the valve stem, then use a screwdriver or adjustment tool to turn the stem until the desired flow rate is achieved.
Ensure the pipe threads were properly wrapped with PTFE tape or sealed with pipe compound during installation. Check that the union nut is tightened to the manufacturer's torque specifications.
The valve may be set too low. Verify that the internal stem is open enough to allow water flow, or check that the system pump is functioning correctly.
Ensure the correct tool is being used to turn the stem and that there is no debris obstructing the valve mechanism.
Installation should be performed by a qualified heating engineer to ensure all joints are properly sealed using compatible pipe dope or PTFE tape. The valve features standard DN15 (1/2 inch) connections, making it compatible with most residential and light commercial radiator piping. To maintain performance, ensure the system water is treated with appropriate inhibitors to prevent internal corrosion. If the valve needs to be adjusted after initial installation, ensure you have the correct size tool for the internal stem to avoid stripping the valve head.
