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Siemens Actuator: Dampers/Economizers, On/Off, Spring Return, 20 in-lb, 24V AC/DC - Fail-Safe Actuators with Spring Return
SiemensFail-Safe Actuators with Spring Return

Siemens Actuator: Dampers/Economizers, On/Off, Spring Return, 20 in-lb, 24V AC/DC

The Siemens GQD121.1P is a fail-safe actuator with spring return for dampers and economizers, featuring a set screw shaft coupling and 90° stroke with CW/CCW rotation. It operates on 24V AC/DC with a 4.5W power…

SKU 3G-OTH-67083

Brand
Siemens
Item
Actuator: Dampers/Economizers, On/Off, Spring Return, 20 in-lb, 24V AC/DC
Category
Fail-Safe Actuators with Spring Return
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Technical Specifications

Siemens
Manufacturer Part Number
GQD121.1P
Type
On/Off, Spring Return, 20 in-lb, NEMA 1 / IP40
AC/DC
24V
Shaft Type
Set Screw Shaft Coupling
Power Rating
4.5W
Input Voltage
24V AC/DC
Output Signal
2 to 10V DC
Plenum Rating
Plenum Rated
Stroke Degree
90°
Shaft Rotation
CW/CCW
Auxiliary Switch Included
No
Electrical Connection Type
Hardwired
For Use With Building Automation Systems
Building Automation System Compatible
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Siemens GQD121.1P is a fail-safe actuator with spring return for dampers and economizers, featuring a set screw shaft coupling and 90° stroke with CW/CCW rotation. It operates on 24V AC/DC with a 4.5W power rating and outputs a 2 to 10V DC signal. This plenum-rated, hardwired unit is compatible with building automation systems.

Frequently Asked Questions

What is the Siemens GQD121.1P actuator used for?

The Siemens GQD121.1P is a fail-safe spring return actuator for dampers and economizers in HVAC and building automation systems. It provides on/off control with a 90° stroke and CW/CCW rotation, ensuring reliable damper positioning in plenum-rated environments.

What are the specifications of the Siemens GQD121.1P?

The Siemens GQD121.1P operates on 24V AC/DC with a 4.5W power rating, outputs a 2 to 10V DC signal, and delivers 20 in-lb torque. It features a set screw shaft coupling, NEMA 1 / IP40 enclosure, and is plenum rated for hardwired installation.

Where to buy the Siemens GQD121.1P worldwide?

3G Electric supplies the Siemens GQD121.1P actuator worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source and deliver this fail-safe spring return actuator to your facility, ensuring compliance with your project requirements.

How to install the Siemens GQD121.1P actuator?

Mount the Siemens GQD121.1P directly onto the damper shaft using the set screw coupling, ensuring a 90° stroke alignment. Connect 24V AC/DC power and the 2 to 10V DC control signal per wiring diagram. Verify spring return direction (CW/CCW) before commissioning.

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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