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Siemens Electric Actuator: Dampers, On/Off, Spring Return, 30 lb-in, 120V AC - Fail-Safe Actuators with Spring Return
SiemensFail-Safe Actuators with Spring Return

Siemens Electric Actuator: Dampers, On/Off, Spring Return, 30 lb-in, 120V AC

The SIEMENS GRD226.1U is a fail-safe spring return electric actuator for dampers, featuring a 1/2" round shaft and 30 lb-in torque. It operates on 120V AC input voltage with hardwired plenum rated cables and includes…

SKU 3G-OTH-68538

Brand
Siemens
Item
Electric Actuator: Dampers, On/Off, Spring Return, 30 lb-in, 120V AC
Category
Fail-Safe Actuators with Spring Return
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Technical Specifications

Siemens
Manufacturer Part Number
GRD226.1U
Type
On/Off, Spring Return, 30 lb-in, Hardwired Plenum Rated Cables
AC
120V
Shaft Type
1/2" Round
Input Voltage
120V AC
Output Signal
2 Auxiliary Switch
Plenum Rating
Plenum Rated
Auxiliary Switch Included
Yes
Electrical Connection Type
Hardwired
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS GRD226.1U is a fail-safe spring return electric actuator for dampers, featuring a 1/2" round shaft and 30 lb-in torque. It operates on 120V AC input voltage with hardwired plenum rated cables and includes two auxiliary switches for output signaling. This plenum rated actuator is designed for on/off damper control applications.

Frequently Asked Questions

What is the Siemens GRD226.1U electric actuator used for?

The Siemens GRD226.1U is a fail-safe spring return electric actuator designed for on/off damper control in HVAC systems. It provides 30 lb-in torque and is plenum rated, making it suitable for air-handling spaces where fire and smoke dampers require reliable spring-return closure upon power loss.

What are the specifications of the Siemens GRD226.1U actuator?

The Siemens GRD226.1U operates on 120V AC input voltage with a 1/2" round shaft and 30 lb-in torque. It includes two auxiliary switches for output signaling and features hardwired plenum rated cables. The actuator is plenum rated and designed for fail-safe spring return damper applications.

Where to buy the Siemens GRD226.1U actuator worldwide?

You can source the Siemens GRD226.1U actuator through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this fail-safe spring return damper actuator.

How to install the Siemens GRD226.1U spring return actuator?

Mount the actuator directly onto the damper shaft using the provided bracket, ensuring the 1/2" round shaft is fully engaged. Connect 120V AC power via the hardwired plenum rated cables per the wiring diagram. Test spring return operation by removing power to verify fail-safe closure. Follow Siemens installation manual for torque and auxiliary switch setup.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

Siemens Products

3G Electric supplies Siemens fail-safe actuators with spring return. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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