The VA-7081-21 is a terminal unit valve actuator manufactured by Johnson Controls. Here are the key specifications and features of this device:

## Technical Specifications

– **Type**: Linear thermal valve actuator[4]
– **Control**: ON/OFF or DAT (Digital Addressable Technology)[1]
– **Power Supply**: 24 VAC/VDC +20% – 10%[1]
– **Nominal Force**: 100 N ± 5%[1]
– **Nominal Stroke**: 5 mm[1]
– **Running Time**: Approximately 4.5 minutes[1]
– **Protection Class**: III[1]
– **Ingress Protection Rating**: IP54 (EN60529)[1]

## Operational Characteristics

– **Action**: Normally Closed. Stem retracts when energized[1]
– **Mounting Thread**: M28 x 1.5[1]
– **Valve Connection**: Designed for field mounting onto Johnson Controls Terminal Unit Valves, including VG3000 and VP1000 series[5]

## Additional Features

– **Compact Design**: Ideal for installation in confined spaces, such as fan coils[1]
– **Flexible Application**: Suitable for Johnson Controls valves and many other terminal unit valves on the market[1]
– **Easy Installation**: Can be mounted after the valve body is installed, allowing for more flexibility in actuator selection[1]
– **Visible Stroke Indicator**: Actuator stroke is visible from any direction, even in confined spaces and dark environments[1]

## Environmental Specifications

– **Maximum Valve Operating Temperature**: 100°C[1]
– **Ambient Operating Conditions**: 0 to +60°C, non-condensing[1]

The VA-7081-21 is part of the VA-708x series, which offers various models with different configurations to suit specific application needs in HVAC systems, particularly in terminal unit valve control.