product menu
- Balancing/Regulating Dampers
- Precision/Flow™ Regulators
- Remote Control Bowden Cable
- Remote Control Power/Balance™
- Remote Control Twisting Cable
- Control & Backdraft Dampers
- Backdraft Dampers
- IRIS Damper
- Rectangular Dampers
- Round Dampers
- Small Motorized Rectangular Dampers
- Small Motorized Round Dampers
- Industrial Dampers
- Blast Dampers
- Industrial Backdraft Dampers
- Rectangular Industrial Dampers
- Round Industrial Dampers
- Life Safety Dampers
- Ceiling Radiation (Fire) Dampers
- Combination Fire/Smoke Dampers
- Dynamic Fire Dampers
- Smoke Dampers
- Static Fire Dampers
- Louvers
- Acoustical Louvers
- Adjustable Louvers
- Blast Louvers
- Brick Vents
- Combination Louver/Damper
- Dade County Hurricane Louvers
- Equipment Screens
- FEMA 361 Louver/Grille
- Fixed Louvers
- PTAC Grilles
- Wind-Driven Rain / Sand Louvers
- Misc. Products
- Control Damper Act.
- Duct Smoke Detectors
- Life Safety Actuators
- Plenums
- Security Bars & Grilles
- VAV Terminals
Our Products
- Balancing/Regulating Dampers
- Precision/Flow™ Regulators
- Remote Control Bowden Cable
- Remote Control Power/Balance™
- Remote Control Twisting Cable
- Control & Backdraft Dampers
- Backdraft Dampers
- IRIS Damper
- Rectangular Dampers
- Round Dampers
- Small Motorized Rectangular Dampers
- Small Motorized Round Dampers
- Industrial Dampers
- Blast Dampers
- Industrial Backdraft Dampers
- Rectangular Industrial Dampers
- Round Industrial Dampers
- Life Safety Dampers
- Ceiling Radiation (Fire) Dampers
- Combination Fire/Smoke Dampers
- Dynamic Fire Dampers
- Smoke Dampers
- Static Fire Dampers
- Louvers
- Acoustical Louvers
- Adjustable Louvers
- Blast Louvers
- Brick Vents
- Combination Louver/Damper
- Dade County Hurricane Louvers
- Equipment Screens
- FEMA 361 Louver/Grille
- Fixed Louvers
- PTAC Grilles
- Wind-Driven Rain / Sand Louvers
- Misc. Products
- Control Damper Act.
- Duct Smoke Detectors
- Life Safety Actuators
- Plenums
- Security Bars & Grilles
- VAV Terminals
Control Damper Act.
Sprin Return, Non Fail-Safe, and Pneumatic Actuators
Siemens GMA 221.1U
GMA Series, Spring Return, 62 lb-in, Rotary, Electronic Damper Actuators
Product Overview
The OpenAir direct-coupled spring return electronic actuator is designed for modulating, two-position, and floating control of building HVAC dampers.