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Siemens Servo actuator SQM50.481A2

SKU SQM50.481A2 Brand Siemens
Siemens logo — Siemens spare parts for burners and boilers Brand Siemens
Buy Siemens Servo actuator SQM50.481A2

Key specifications

Equipment compatibilityfull compatibility with siemens equipment
Control signal formatthree-point, 0-10 V, or on/off
all specifications (2) ↓

1140.00EUR

in stock · 1

excl. VAT · import VAT and duties on delivery · shipping calculated at checkout

  • Delivery to 97 countries
  • Original manufacturer part
  • Dispatch within 24 h for stocked items

Description

The Siemens SQM50.481A2 is a servo actuator designed for precise positioning of air dampers, gas valves, and mixing valves in combustion control systems and industrial automation. It operates with a control signal format of three-point, 0-10 V, or on/off, and is fully compatible with Siemens equipment. This actuator is used in burner units and boiler plants to modulate combustion air or water flow, ensuring stable and efficient operation. It is part of the SQM50 series and is suitable for installation, modernization, and service of gas burner systems.

Further details

Applicationposition air dampers and mixing valves
Application descriptionposition air dampers and mixing valves in burner and boiler systems, translating a control signal into rotational movement
Failure modesstripped gear teeth, defective end switch, seized valve stem
Mechanical linkagemechanically linked to a damper shaft or a three-way or four-way mixing valve stem
Modulationmodulate combustion air flow or water flow in mixing circuits
Replacement checksverify control signal, torque, running time, and mechanical interface

Choosing and fitting

When selecting a replacement actuator of this type, verify that the control signal format (three-point, 0-10 V, or on/off), torque, running time, shaft diameter, coupling pattern, angle of rotation, and any integral auxiliary switches match the existing installation. The actuator is typically mechanically linked to a damper shaft or a mixing valve stem; for mixing valves, the motor is often supplied separately from the valve body. Ensure the mechanical interface and electrical connections are compatible before ordering.

Signs of failure

Common failure modes for actuators of this type include stripped gear teeth, defective end switches, or a seized valve stem that locks up after prolonged standstill. Symptoms may include erratic positioning, failure to respond to control signals, or the actuator not moving at all. Check the gear train, end switches, and the valve or damper mechanism for binding or damage.

All specifications

Equipment compatibilityfull compatibility with siemens equipment
Control signal formatthree-point, 0-10 V, or on/off

Part numbers

SKUSQM50.481A2
Additional article884.712.019

Fits burners · 63

Ecoflam BLU 10000.1 PR TC Gas · 2500–10500 kW All parts for this burner → Ecoflam BLU 10000.1 PR TC VGD 40.065 Gas · 2500–10500 kW All parts for this burner → Ecoflam BLU 10000.1 PR TC VGD 40.080 Gas · 2500–10500 kW All parts for this burner → Ecoflam BLU 10000.1 PR TC VGD 40.100 Gas · 2500–10500 kW All parts for this burner → Ecoflam BLU 10000.1 PR TC VGD 40.125 Gas · 2500–10500 kW All parts for this burner → Ecoflam BLU 12000.1 PR TC — gas burner Ecoflam BLU 12000.1 PR TC Gas · 2700–13000 kW All parts for this burner → Ecoflam BLU 12000.1 PR TC VGD 40.080 Gas · 2700–13000 kW All parts for this burner → Ecoflam BLU 12000.1 PR TC VGD 40.100 Gas · 2700–13000 kW All parts for this burner → Ecoflam BLU 12000.1 PR TC VGD 40.125 Gas · 2700–13000 kW All parts for this burner → Ecoflam BLU 3000.1 PR TC — gas burner Ecoflam BLU 3000.1 PR TC Gas · 630–3000 kW All parts for this burner → Ecoflam BLU 3000.1 PR TC A — gas burner Ecoflam BLU 3000.1 PR TC A Gas · 630–3000 kW All parts for this burner → Ecoflam BLU 3000.1 PR TC VGD — gas burner Ecoflam BLU 3000.1 PR TC VGD Gas · 630–3000 kW All parts for this burner → Ecoflam BLU 3000.1 PR TC VGD 20.503 — gas burner Ecoflam BLU 3000.1 PR TC VGD 20.503 Gas · 630–3000 kW All parts for this burner → Ecoflam BLU 3000.1 PR TC VGD 40.080 — gas burner Ecoflam BLU 3000.1 PR TC VGD 40.080 Gas · 630–3000 kW All parts for this burner → Ecoflam BLU 3000.1 PR TC VGD 40.100 — gas burner Ecoflam BLU 3000.1 PR TC VGD 40.100 Gas · 630–3000 kW All parts for this burner → Ecoflam BLU 3000.1 PR TL — gas burner Ecoflam BLU 3000.1 PR TL Gas · 630–3000 kW All parts for this burner → Ecoflam BLU 3000.1 PR TL A — gas burner Ecoflam BLU 3000.1 PR TL A Gas · 630–3000 kW All parts for this burner → Ecoflam BLU 3000.1 PR TL VGD — gas burner Ecoflam BLU 3000.1 PR TL VGD Gas · 630–3000 kW All parts for this burner → Ecoflam BLU 3000.1 PR TL VGD 40.080 — gas burner Ecoflam BLU 3000.1 PR TL VGD 40.080 Gas · 630–3000 kW All parts for this burner → Ecoflam BLU 3000.1 PR TL VGD 40.100 — gas burner Ecoflam BLU 3000.1 PR TL VGD 40.100 Gas · 630–3000 kW All parts for this burner → Ecoflam BLU 4000.1 PR TC — gas burner Ecoflam BLU 4000.1 PR TC Gas · 875–3900 kW All parts for this burner → Ecoflam BLU 4000.1 PR TC A — gas burner Ecoflam BLU 4000.1 PR TC A Gas · 875–3900 kW All parts for this burner → Ecoflam BLU 4000.1 PR TC VGD — gas burner Ecoflam BLU 4000.1 PR TC VGD Gas · 875–3900 kW All parts for this burner → Ecoflam BLU 4000.1 PR TC VGD 20.503 — gas burner Ecoflam BLU 4000.1 PR TC VGD 20.503 Gas · 875–3900 kW All parts for this burner → Ecoflam BLU 4000.1 PR TC VGD 40.080 — gas burner Ecoflam BLU 4000.1 PR TC VGD 40.080 Gas · 875–3900 kW All parts for this burner → Ecoflam BLU 4000.1 PR TC VGD 40.100 — gas burner Ecoflam BLU 4000.1 PR TC VGD 40.100 Gas · 875–3900 kW All parts for this burner → Ecoflam BLU 4000.1 PR TL — gas burner Ecoflam BLU 4000.1 PR TL Gas · 875–3900 kW All parts for this burner → Ecoflam BLU 4000.1 PR TL A — gas burner Ecoflam BLU 4000.1 PR TL A Gas · 875–3900 kW All parts for this burner → Ecoflam BLU 4000.1 PR TL VGD — gas burner Ecoflam BLU 4000.1 PR TL VGD Gas · 875–3900 kW All parts for this burner → Ecoflam BLU 4000.1 PR TL VGD 20.503 — gas burner Ecoflam BLU 4000.1 PR TL VGD 20.503 Gas · 875–3900 kW All parts for this burner → Ecoflam BLU 4000.1 PR TL VGD 40.080 — gas burner Ecoflam BLU 4000.1 PR TL VGD 40.080 Gas · 875–3900 kW All parts for this burner → Ecoflam BLU 4000.1 PR TL VGD 40.100 — gas burner Ecoflam BLU 4000.1 PR TL VGD 40.100 Gas · 875–3900 kW All parts for this burner → Ecoflam BLU 7000.1 PR TC — gas burner Ecoflam BLU 7000.1 PR TC Gas · 1500–7500 kW All parts for this burner → Ecoflam BLU 7000.1 PR TC CV Gas · 1500–7500 kW All parts for this burner → Ecoflam BLU 7000.1 PR TC VGD — gas burner Ecoflam BLU 7000.1 PR TC VGD Gas · 1500–7500 kW All parts for this burner → Ecoflam BLU 7000.1 PR TC VGD 40.080 — gas burner Ecoflam BLU 7000.1 PR TC VGD 40.080 Gas · 1500–7500 kW All parts for this burner → Ecoflam BLU 7000.1 PR TC VGD 40.100 — gas burner Ecoflam BLU 7000.1 PR TC VGD 40.100 Gas · 1500–7500 kW All parts for this burner → Ecoflam BLU 7000.1 PR TC VGD 40.125 — gas burner Ecoflam BLU 7000.1 PR TC VGD 40.125 Gas · 1500–7500 kW All parts for this burner → Ecoflam BLU 8000.1 PR TC — gas burner Ecoflam BLU 8000.1 PR TC Gas · 2000–8500 kW All parts for this burner → Ecoflam BLU 8000.1 PR TC VGD Gas · 2000–8500 kW All parts for this burner → Ecoflam BLU 8000.1 PR TC VGD 40.080 Gas · 2000–8500 kW All parts for this burner → Ecoflam BLU 8000.1 PR TC VGD 40.100 Gas · 2000–8500 kW All parts for this burner → Ecoflam BLU 8000.1 PR TC VGD 40.125 — gas burner Ecoflam BLU 8000.1 PR TC VGD 40.125 Gas · 2000–8500 kW All parts for this burner → Ecoflam MULTIFLAM 1000.1 PR TC 2500–10500 kW All parts for this burner → Ecoflam MULTIFLAM 1000.1 PR TC VGD 40.065 2500–10500 kW All parts for this burner → Ecoflam MULTIFLAM 1000.1 PR TC VGD 40.080 2500–10500 kW All parts for this burner → Ecoflam MULTIFLAM 1000.1 PR TC VGD 40.100 2500–10500 kW All parts for this burner → Ecoflam MULTIFLAM 1000.1 PR TC VGD 40.125 2500–10500 kW All parts for this burner → Ecoflam MULTIFLAM 1200.1 PR TC 2700–13000 kW All parts for this burner → Ecoflam MULTIFLAM 1200.1 PR TC VGD 40.080 2700–13000 kW All parts for this burner → Ecoflam MULTIFLAM 1200.1 PR TC VGD 40.100 2700–13000 kW All parts for this burner → Ecoflam MULTIFLAM 1200.1 PR TC VGD 40.125 2700–13000 kW All parts for this burner → Ecoflam MULTIFLAM 700.1 PR 1500–7500 kW All parts for this burner → Ecoflam MULTIFLAM 700.1 PR TC VGD 40.065 1500–7500 kW All parts for this burner → Ecoflam MULTIFLAM 700.1 PR TC VGD 40.080 1500–7500 kW All parts for this burner → Ecoflam MULTIFLAM 700.1 PR TC VGD 40.100 1500–7500 kW All parts for this burner → Ecoflam MULTIFLAM 700.1 PR TC VGD 40.125 1500–7500 kW All parts for this burner → Ecoflam MULTIFLAM 800.1 PR TC 2000–8500 kW All parts for this burner → Ecoflam MULTIFLAM 800.1 PR TC VGD 40.065 2000–8500 kW All parts for this burner → Ecoflam MULTIFLAM 800.1 PR TC VGD 40.080 2000–8500 kW All parts for this burner → Ecoflam MULTIFLAM 800.1 PR TC VGD 40.100 2000–8500 kW All parts for this burner → Ecoflam MULTIFLAM 800.1 PR TC VGD 40.125 2000–8500 kW All parts for this burner → Oilon GKP-450 M WD34 VGD40.065-SKP15/25.0 850–5500 kW All parts for this burner →

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