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SiemensFail-Safe Actuators with Spring Return

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

The Siemens GRD221.1U is a fail-safe electric actuator for dampers with spring return, featuring on/off operation. It is powered by 120V AC and has a 1/2" round shaft with hardwired electrical connection. This…

SKU 3G-OTH-68179

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
GRD221.1U
Type
On/Off, Spring Return, 30 lb-in, Hardwired Plenum Rated Cables
AC
120V
Shaft Type
1/2" Round
Input Voltage
120V AC
Plenum Rating
Plenum Rated
Electrical Connection Type
Hardwired
View Full Spec Sheet

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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Siemens GRD221.1U is a fail-safe electric actuator for dampers with spring return, featuring on/off operation. It is powered by 120V AC and has a 1/2" round shaft with hardwired electrical connection. This plenum-rated actuator delivers 30 lb-in of torque.

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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Actuator: Dampers, Proportional, Spring Return, 160 in-lb, 24V AC/DC, Hardwired, NEMA 2 / IP54 (MPN GCA161.1U). Key specifications — Manufacturer Part Number: GCA161.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Stroke Degree: 90°; Power Rating: 5W; Input Voltage: 24V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.
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Actuator: Dampers, Proportional, Spring Return, 160 in-lb, 24V AC/DC, Hardwired, NEMA 2 / IP54 (MPN GCA161.1U). Key specifications — Manufacturer Part Number: GCA161.1U; Shaft Type: Self-Centering Shaft Coupling; Shaft Rotation: CW/CCW; Stroke Degree: 90°; Power Rating: 5W; Input Voltage: 24V AC/DC; Brand: SIEMENS; For Use With Building Automation Systems: Building Automation System Compatible.