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Siemens Relay LFL 1.133 - Burner Controls
SiemensBurner Controls

Siemens Relay LFL 1.133

The Siemens Relay LFL 1.133 is a burner control unit designed for gas, oil, or bi-fuel burners rated medium to large, supporting single or dual tube configurations. Operating in intermittent mode with shutdown…

SKU 3G-CBM-05815

Brand
Siemens
Item
Relay LFL 1.133
Category
Burner Controls
UNSPSC
40101833 — Boiler or heater igniter
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Technical specs
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Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

Siemens
burner type
gas, oil, or bi-fuel
operation mode
intermittent (shutdown by regulation minimum 1× per 24 h)
series variants
01 and 02 (differ by ignition safety time duration)
air damper control
yes
high power variant
LFL1.638 for large atmospheric burners
burner control type
multi-stage or modulating
burner power rating
medium to large
burner configuration
single or dual tube
lfl1 638 application
large atmospheric burners
controlled air damper
yes
probe cable max length
see technical characteristics
uv probe configuration
up to 2 probes in parallel possible
application suitability
hot air generators
safety time second phase
t9
flame supervision sensor uv
QRA type
unlock function max duration
10 s
unlock button operating force
≤ 10 N
terminal grounding requirement
terminal 22 to earth when using QRA type sensors
dual sensor operation restriction
only one sensor active except during 2nd safety time (t9)
flame supervision sensor ionization
yes
ionization probe contact protection
not protected against accidental contact
probe signal transmission requirement
separate low-capacitance cable required
installation requirement ignition cable
separate installation, maximum distance from apparatus and other cables

Technical Documents

(1)
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Siemens Relay LFL 1.133 is a burner control unit designed for gas, oil, or bi-fuel burners rated medium to large, supporting single or dual tube configurations. Operating in intermittent mode with shutdown regulation minimum 1× per 24 h, it provides multi-stage or modulating burner control with air damper regulation. The LFL 1.133 series is available in variants 01 and 02, differentiated by ignition safety time duration, and accommodates UV flame supervision via QRA type sensors (up to 2 probes in parallel) or ionization sensors. 3G Electric supplies this Siemens control relay for industrial heating applications across Singapore and Southeast Asia.

Frequently Asked Questions

Where can I buy the Siemens Relay LFL 1.133 in your region?

3G Electric supplies the Siemens Relay LFL 1.133 burner control with delivery to your location. We handle all customs clearance and logistics to your facility. Contact us for pricing and lead time.

What is the lead time for the Siemens Relay LFL 1.133?

Lead time on request and depends on current availability. 3G Electric coordinates with our supplier network and manages customs import documentation. Delivery timeline confirmed upon order placement.

Can the Siemens Relay LFL 1.133 control bi-fuel burners?

Yes. The LFL 1.133 supports gas, oil, or bi-fuel burners rated medium to large capacity. It provides multi-stage or modulating control with air damper adjustment, suitable for single or dual tube configurations.

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
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Siemens Products

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

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