1550 kW German Natural Gas Burner with Integrated Gas Train for Industrial Heating

This high-efficiency natural gas burner is designed for a wide range of industrial heating applications, including hot water boilers, steam boilers, and air heaters. It is engineered to deliver reliable, economical, and environmentally friendly combustion performance under demanding conditions, capable of overcoming high combustion chamber pressures typically found in modern high-rating boilers.

Features and Functions

• Wide Power Range: The burner operates efficiently across a capacity range of approximately 250 to 1550 kW, suitable for medium to large-scale industrial heating needs.

• Advanced Regulation Options: Includes sliding two-stage and modulating control for precise fuel and air mixture regulation. The modulation feature allows continuous adjustment of flame output to match heat demand, enhancing efficiency.

• Automatic Operation Sequence: Equipped with an automatic combustion sequence including pre-purge, ignition, flame monitoring, and safe shutdown.

• Flame Supervision: Uses ionization principle flame sensors for gas operation, ensuring safe and stable flame detection. Dual fuel variants employ UV diode flame sensors.

• Quiet and Stable Operation: The fan and combustion head design ensure stable combustion with low noise emissions.

• Easy Maintenance: Hinged burner casing and adjustable combustion head simplify installation, servicing, and maintenance.

• Fuel Flexibility: While optimized for natural gas, the burner design allows easy conversion to Liquid Petroleum Gas (LPG) without significant modification—only recommissioning is needed.

• Safety Compliance: Complies with EN 676 for gas burners and includes required safety components such as double solenoid valves, gas filters, and pressure regulators. Valve proving systems are recommended for outputs above 1200 kW.

Technical Parameters

Parameter	Specification
Power Output Range	250 kW – 1550 kW
Fuel Types	Natural Gas (E and LL), Liquid Petroleum Gas (LPG) conversion available
Control Types	Sliding two-stage (8s or 20s servomotor), Modulating (20s to 42s servomotor)
Electrical Supply	Three-phase alternating current
Flame Supervision	Ionization flame sensor (natural gas)
Operating Temperature	-10°C to +40°C (custom low temperature options available)
Gas Pressure Compatibility	Low and high-pressure gas supply regulation with double solenoid valves and pressure regulators
Combustion Chamber Pressure	Suitable for high combustion chamber pressures
Safety Features	Automatic air closure, valve proving system (recommended above 1200 kW), double solenoid valves (Class A)

Structural Composition

The burner integrates all components into a compact, modular assembly:

• Motor and fan unit aligned perpendicularly to airflow for optimized combustion air supply

• Combustion head with adjustable flame tube to match appliance requirements

• Gas valve train including double solenoid valves and gas butterfly valve

• Ignition system with transformer and electrodes

• Servomotor-driven cams for synchronous gas and air regulation

• Optional integral or separate control panels with flame supervision and safety interlocks

Working Principle

Upon burner start-up, a controlled ignition sequence releases a small ignition load of gas to establish a stable pilot flame. After ignition confirmation, the burner transitions to main flame operation with modulating or staged fuel input controlled by the servomotor. This gradual regulation ensures minimal combustion chamber disturbances and prevents pressure surges in the gas system during shutdown by enabling partial load shutdown control.

Our product operates on the same working principle as the Weisaupt G7 Gas Burner, utilizing continuous flame monitoring via ionization sensors that automatically manage safety shutoff if flame stability is compromised. For dual fuel models, magnetic clutches disconnect the oil pump when operating on gas, reducing wear.

Applications

This burner is ideal for use in:

• Industrial hot water and steam boilers

• Air heating systems

• Process heating in manufacturing

• Modern high-capacity boiler installations requiring high reliability and clean combustion
  It can be compared to well-known industrial burners like those from other established German manufacturers, matching their performance in terms of efficiency and emission control.

Gas pressure before ball valve (mbar)							Gas pressure before solenoid valve (mbar)
Valve group selection
1”	DN40	DN50	DN65	DN80	DN100	DN125	1”	DN40	DN50	DN65	DN80	DN100	DN125
Butterfly valve size
40	40	50	65	65	65	65	40	40	50	65	65	65	65
natural gas E, Hi = 37.26 MJ/mn3 (10.35 kWh/mn3)
800	77	30	18	12	9	8	–	26	13	11	7	6	5	5
900	96	37	22	13	10	9	9	32	16	13	9	7	6	6
1000	117	44	26	15	12	10	9	39	19	16	10	8	7	7
1100	141	52	30	17	13	11	10	46	22	19	11	9	8	7
1200	166	61	34	19	14	12	11	55	26	21	13	10	9	8
1400	224	81	44	24	17	14	12	73	34	28	16	12	10	9
1600	290	103	55	29	20	16	14	94	43	35	19	14	12	11
1750	–	122	65	33	22	17	15	111	50	40	22	16	13	12
natural gas LL, Hi = 31.79 MJ/mn3 (8.83 kWh/mn3)
800	109	41	24	14	11	9	8	36	17	14	9	7	6	6
900	136	50	28	16	12	10	9	45	21	17	11	8	7	7
1000	167	61	34	19	13	11	10	54	26	21	12	9	8	7
1100	201	72	40	21	15	12	11	65	30	24	14	10	9	8
1200	237	85	46	24	16	13	12	77	35	28	16	11	10	9
1400	–	113	60	30	20	15	14	103	46	37	20	14	12	10
1600	–	145	76	37	24	18	15	133	59	47	25	17	13	12
1750	–	172	89	43	27	20	17	–	69	55	28	19	15	13
liquefied gas B/P, Hi = 93.20 MJ/mn3 (25.89 kWh/mn3)
800	35	16	11	8	–	–	–	13	7	7	–	–	–	–
900	43	19	13	9	–	–	–	15	9	8	6	–	–	–
1000	52	22	14	10	9	–	–	18	10	9	6	6	5	5
1100	62	26	16	11	9	9	8	22	12	10	7	6	6	6
1200	72	29	18	12	10	9	9	25	14	12	8	7	6	6
1400	97	38	23	15	12	10	10	33	17	15	10	8	8	7
1600	124	48	28	17	13	12	11	42	21	18	12	10	9	8
1750	147	56	32	19	15	13	12	50	25	21	13	11	10	9

Accessories configuration table

model		G5	G7	G8	G9	G10	G11
Burner motor three-phase 230/400V	model	D90/90-2	D112/110-2/1	–	–	–	–
Burner motor three-phase 400V	model	–	–	D112/140-2/1	D132/120-2a	D132/120-2	D132/150-2
MOTOR	kW	1,5	3	4,8	6,5	9,0	12
Motor load 230/400V	A	6,0/3,5	10,5/6	–	–	–	–
Motor load 400V	A	-	-	9,5	13,5	18	23
Motor fuse	A	10	16	25(20)	35(25)	50(35)	63(35)
motor speed	1/min	2800	2900	2900	2900	2850	2850
ignition transformer	model	W-ZG02/2	W-ZG02/2	W-ZG02/2	W-ZG02/2	W-ZG02/2	W-ZG02/2
Program controller	model	LFL1.322	LFL1.322	LFL1.322	LFL1.322	LFL1.322	LFL1.322
Servo motor smooth two-stage Z (running time 8s)	model	1055/80	1055/80	1055/80	–	–	–
Servo motor smooth two stage fire ZM (running time 20s)	model	SQM10.15562	SQM10.15562	SQM10.15562	SQM10.15562	SQM10.15562	SQM10.15562
Servo motor proportional adjustment type (running time 42s)	model	SQM10.16562	SQM10.16562	SQM10.16562	SQM10.16562	SQM10.16562	SQM10.16562
Weight (without valve group)	kg	55	76	85	130	131	157