Vision Enterprises

A Gas Burner Sequence Controller is an essential safety and automation device in industrial and commercial gas-fired boilers or burners. Its main function is to control the start-up, operation, and shut-down sequence of a gas burner, ensuring safe ignition, flame monitoring, and system protection.

1. Purpose:

   • Automates the burner sequence: pre-purge → ignition → main flame → post-purge → shutdown.

   • Monitors safety interlocks such as flame detection, pressure switches, and limit controls.

   • Prevents unsafe gas release or ignition failures.

2. Components & Functions:

   • Control Panel/Unit: Logic controller that runs the sequence.

   • Timer/Delays: Ensures proper purge times before ignition and post-purge after shutdown.

   • Flame Detector Input: Receives signals from UV, IR, or ionization flame sensors.

   • Output Relays: Activates solenoid valves, ignition transformers, fuel pumps, and fans.

   • Manual/Automatic Modes: Some controllers allow both operation types.

3. Safety Features:

   • Flame supervision: Shuts down the system if no flame is detected.

   • Pressure interlock: Prevents burner ignition if gas or air pressure is abnormal.

   • Lockout feature: Stops operation after repeated ignition failures until reset

Additional Information:

• Delivery Time: stock ready
• Packaging Details: box packing

A Gas Burner Sequence Controller is an automatic control device used for safe start-up, operation, and shutdown of gas burners. It ensures proper sequencing, flame supervision, and safety interlocks in industrial boiler and burner systems.

Additional Information:

• Production Capacity: BEST
• Delivery Time: 1 DAYS

The LME21 series is a microprocessor‑based burner control specifically for 1‑stage or 2‑stage gas burners (and mixed gas/oil burners) in boilers, heaters and industrial combustion equipment. These controllers coordinate the safe ignition sequence, monitor flame status, and shut down the burner if unsafe conditions occur.