Thermostatic Radiator Head Valvex GZ.05-6/28 model 70.444 (MPN 70.444)

Thermostatic radiator head Valvex GZ.05-6/28 model 70.444 is a temperature-regulating valve actuator designed for attachment to compatible radiator valve bodies. It automatically adjusts the flow of hot water through a radiator according to the selected setpoint, enabling proportional control of room temperature in residential and commercial heating systems. The device is intended for use where reliable, straightforward local temperature control is required and where manual adjustment of radiator output is to be replaced by self-regulating operation.

Advantages

The Valvex thermostatic head provides automatic proportional control of radiator flow, helping to maintain stable room temperatures and reduce energy consumption compared with fixed valve settings. Its compact design facilitates direct mounting on standard valve bodies without significant modification. The mechanism responds to ambient temperature changes and adjusts valve position accordingly, offering consistent performance and simple user interaction via an indexed thermostat scale. The unit is suitable for retrofit or new installations and is compatible with typical central heating circuits.

Suitable for

• Individual room temperature control in apartments and houses
• Temperature regulation in offices and small commercial spaces
• Replacement or upgrade of manual radiator valves
• Systems requiring proportional rather than on/off radiator control

Key specifications

• Function: thermostatic actuator for radiator valve
• Control type: proportional temperature regulation via mechanical thermostat element
• Application: hot water central heating radiators
• Mounting: direct attachment to compatible valve bodies
• Adjustment: indexed thermostat scale for setpoint selection
• Use environment: indoor heating systems (residential and commercial)

How to use

Install the thermostatic head on a compatible radiator valve body according to the valve manufacturer’s instructions, ensuring the valve spindle and head are properly aligned and secured. Set the desired temperature using the indexed thermostat scale; the head will modulate valve opening in response to ambient temperature changes to reach and maintain the selected setpoint. Periodically check the head for free movement and correct seating on the valve, and clean externally as needed to prevent dust accumulation that could affect sensing accuracy.

Usage recommendations

For accurate room control, avoid covering the thermostatic head with curtains or furniture and position thermostats away from direct sunlight and radiators. When replacing an existing head, confirm thread and mounting compatibility with the valve body. For systems with thermostatic radiator heads in multiple rooms, balance the heating circuit and bleed radiators before use to ensure uniform performance across the system.