The boiler burner leak detection system (valve leak detection system) is a critical component for the safe operation of gas-fired boilers. It is primarily designed to automatically check for leaks in the gas valve train (whether a dual-valve or single-valve configuration) before burner ignition or after shutdown, thereby preventing gas accumulation in the combustion chamber that could lead to an explosion.
Working Principle (Based on Pressure Monitoring): The system typically utilizes two solenoid valves connected in series, along with an intermediate pressure switch or sensor:
1. Test Phase: After the main gas valves close, the leak detection system pressurizes or evacuates the piping section between the valves to establish a specific pressure level.
2. Pressure Hold/Monitoring: The system maintains this pressure for a preset duration, using the pressure switch or sensor to monitor for any drop in pressure.
3. Result Determination: If the pressure remains constant, the valves are effectively sealed; if the pressure drops, a leak is indicated. The system then locks out the burner, triggers an alarm, and prevents the boiler from starting.
Common Mainstream Brands and Models
DUNGS (Germany): VPS504 series leak detectors, DK2F series.
SIEMENS (Germany): LDU11 series gas leak detectors (incorporating both main and auxiliary relays).
KromSchröder (Germany): TC410 series leak protection units.
Honeywell: e.g., A4021A series.
The boiler burner leak detection system (valve leak detection system) is a critical component for the safe operation of gas-fired boilers. It is primarily designed to automatically check for leaks in the gas valve train (whether a dual-valve or single-valve configuration) before burner ignition or after shutdown, thereby preventing gas accumulation in the combustion chamber that could lead to an explosion.
Working Principle (Based on Pressure Monitoring): The system typically utilizes two solenoid valves connected in series, along with an intermediate pressure switch or sensor:
1. Test Phase: After the main gas valves close, the leak detection system pressurizes or evacuates the piping section between the valves to establish a specific pressure level.
2. Pressure Hold/Monitoring: The system maintains this pressure for a preset duration, using the pressure switch or sensor to monitor for any drop in pressure.
3. Result Determination: If the pressure remains constant, the valves are effectively sealed; if the pressure drops, a leak is indicated. The system then locks out the burner, triggers an alarm, and prevents the boiler from starting.
Common Mainstream Brands and Models
DUNGS (Germany): VPS504 series leak detectors, DK2F series.
SIEMENS (Germany): LDU11 series gas leak detectors (incorporating both main and auxiliary relays).
KromSchröder (Germany): TC410 series leak protection units.
Honeywell: e.g., A4021A series.