Is the Siemens Relay LFL 1.133 available from 3G Electric?

Yes — 3G Electric supplies genuine Siemens products with in-stock availability on common SKUs and worldwide shipping.

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Does 3G Electric provide technical support for burner controls?

Yes, our team of experienced engineers provides full technical support including product selection, installation guidance, commissioning, and after-sales service for all burner controls we distribute.

Siemens Relay LFL 1.133 - Burner Controls

Technical Documents

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SiemensBurner Controls

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Siemens Relay LFL 1.133

Name: Siemens Relay LFL 1.133
Brand: Siemens
SKU: 3G-CBM-05815
Availability: BackOrder

SKU 3G-CBM-05815

Brand

Siemens

Item

Relay LFL 1.133

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 

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Air & sea freight

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Technical specs

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SG-based team

Qty

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Siemens Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

Siemens Relay LFL 1.133

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 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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