Adapter Uponor Fluvia for telestat M30 x M28, connection adapter for radiator valve actuators

Uponor Fluvia adapter M30 x M28 is a mechanical connection adapter that provides a secure threaded interface between telestat actuators and radiator valve stems with different thread sizes. Designed for straightforward mounting, the adapter converts an M30 actuator thread to an M28 valve spindle, enabling correct alignment and reliable transmission of motion from thermostatic or motorized actuators to the valve. The adapter is suitable for retrofit work as well as new installations where a thread size conversion is required.

Advantages

The adapter offers a precise fit and stable connection that reduces play between actuator and valve stem, helping to maintain consistent valve travel and accurate temperature control. Its simple mechanical design allows fast installation without special tools and minimizes the risk of cross-threading. The robust construction ensures long-term mechanical reliability in domestic and light-commercial heating systems.

Suitable for

• Connecting telestat actuators with M30 thread to radiator valves with M28 spindles
• Retrofit projects where actuator and valve thread sizes differ
• New installations requiring compatibility between actuator models and existing valve bodies
• Residential and small commercial hydronic radiator systems

Key specifications

• Thread conversion: M30 to M28 mechanical adapter
• Application: connection between actuator and radiator valve spindle
• Compatibility: designed for telestat-type actuator interfaces and standard M28 valve stems
• Construction: durable mechanical coupling suitable for repeated actuator changes
• Use environment: indoor hydronic heating systems, radiator valves

How to use

Fit the adapter onto the radiator valve spindle by engaging the M28 side first, then screw the telestat actuator onto the M30 side until hand-tight. Ensure correct axial alignment so the actuator stem engages the valve spindle without offset. Check for smooth operation by actuating the valve through its full travel and reconfirm that there is no lateral play. If necessary, tighten to the manufacturer’s recommended torque while avoiding over-tightening that could damage threads.

Usage recommendations

Before installation, verify that the actuator model and valve stem dimensions match the adapter’s M30-to-M28 conversion. For best results, inspect threads for damage or contamination and replace the adapter if wear or deformation is present. Use with compatible thermostatic or motorized telestat actuators and follow local safety and installation guidelines.