Datasheet Content
DUAL FUEL GAS/LIGHT-OIL BURNERS AT TWO STAGES SK073516_D_en
DUAL FUEL GAS/LIGHT-OIL BURNERS AT TWO STAGES
K 4/2 EVO 2
Dual fuel gas/light-oil burners at 2 stages.
Composed with: aluminum body, air blower at high pressurisation and combustion head with adjustment at high
efficiency and high flame stability.
Compact overall dimensions and disposition rationalized of the components with accessibility facilitated for the
easy setting and maintenance.
Available in the versions METHANE (natural gas) or G.P.L. (to specify at the order) on demand specific versions for
town gas, coal gas or biogas.
Gas train composed by: one-block valve A class (1st stage + 2nd stage slow opening + safety), minimum gas
pressure switch and stabiliser filter.
Complete of: flange and gasket for installation on generator, nozzles, flexible hoses and line filter.
Fig. 1 K 4/2 EVO 2
K 4/2 EVO 2
DUAL FUEL GAS/LIGHT-OIL BURNERS AT TWO STAGES SK073516_D_en
TECHNICAL DATA
MODEL K 4/2 EVO 2
Thermal power min. 1°st. / min. 2°st. - max. 2°st. * [Mcal/h] 100/200-450
Thermal power min. 1°st. / min. 2°st. - max. 2°st. * [kW] 116/232-523
Gas flow G20 (NATURAL GAS) min.1°st. / min. 2°st. - max. 2°st. * [Nm³/h] 11.7/23.4-52.6
Gas flow G31 (L.P.G.) min. 1°st. / min. 2°st. - max. 2°st. * [Nm³/h] 4.5/9-20.3
LIGHT-OIL flow min. 1°st. / min. 2°st. - max. 2°st. * [kg/h] 10/20-45
Fuel: NATURAL GAS (second family) - L.P.G. (third family)
Fuel category: I2R,I2H,I2L,I2E,I2E+,I2Er,I2ELL,I2E(R) - I3B/P,I3+,I3P,I3B,I3R
Intermitted working operation (min. 1 stop every 24 hours) two stage
Environmental conditions operation / storage: -15...+40°C / -20...+70°C, rel. humidity max. 80%
Max. temperature combustion air [°C] 60
Minimum pressure gas train D1" - S NATURAL GAS/LPG ** [mbar] 95/60
Minimum pressure gas train D1"1/4 - S NATURAL GAS/LPG ** [mbar] 54.5/44
Minimum pressure gas train D1"1/2 -S NATURAL GAS/LPG ** [mbar] 28/33
Minimum pressure gas train D2" -S NATURAL GAS/LPG ** [mbar] 26.5/33
Maximum pressure at the entry of valves (Pe. max) [mbar] 360
Nominal electric power [W] 800
Fan motor [W] 550
Fan motor current absorption [A] 1.4
Pump motor [W] 180
Pump motor current absorption [A] 0.5
Nominal auxiliary absorption [A] 0.7
Power supply: 3~400V, 1/N~230V-50Hz
Electric protection degree: IP 40
Noisiness *** min. - max. [dB(A)] 73-76
Burner weight [kg] 45
* Reference conditions: Environment temperature 20°C - Barometric pressure 1013 mbars - Altitude 0 metre (sea level).
** Minimal feeding-gas pressure to the gas train to get the maximum power of the burner, considering counter-pressure in combustion chamber
of value 0 (zero).
*** Measured sonorous pressure in the laboratory combustion, with functional burner on beta boiler to 1 metre of distance (UNI EN ISO 3746 -
Control method Class 3 - Tolerance on the measured sound pressure can be assumed equal to ± 1 [dB (A)]).
K 4/2 EVO 2
DUAL FUEL GAS/LIGHT-OIL BURNERS AT TWO STAGES SK073516_D_en
OPERATING RANGE DIAGRAM
[mbar] ϵ͕ϱ
K 4/2 EVO 2
8͕ϱ
7͕ϱ
ϲ͕ϱ
ϱ͕ϱ
ϰ͕ϱ
ϯ͕ϱ
Ϯ͕ϱ
ϭ͕ϱ
Ϭ͕ϱ
ͲϬ͕ϱ
ϱϬ ϭϱϬ ϮϱϬ ϯϱϬ ϰϱϬ ϱϱϬ 6ϱϬ
Ŭt
Fig. 2 X = Thermal power Y = pressure in combustion chamber
The firing rates has been obtained based on test boilers in accordance with EN676 standards and are indicative of matching the burner to the
boiler. For the correct operation of the burner bruciatore, combustion chamber dimensions must be in accordance with current regulation. In case
of non-compliance, contact the manufacturer.
K 4/2 EVO 2
DUAL FUEL GAS/LIGHT-OIL BURNERS AT TWO STAGES SK073516_D_en
DIMENSIONS [MM]
A
A
R1
RD
B C
R2
R3
H
D
G
TC-TL E
R4
F
Fig. 3 Dimensions: K 4/2 EVO 2
MODEL A B C D E F G H R1 R2 R3 R4 RD
K 4/2 EVO 2 - D1" - S 190 245 385 150 100 793 416 100 193 360 418 445 Rp 1
K 4/2 EVO 2 - D1"1/4 - S 190 245 385 150 100 793 416 100 193 360 418 445 Rp 1 1/4
K 4/2 EVO 2 - D1"1/2 - S 190 245 385 150 100 793 416 100 193 360 438 445 Rp 1 1/2
K 4/2 EVO 2 - D2" - S 190 245 385 150 100 793 416 100 193 360 418 445 Rp 2
K 4/2 EVO 2
DUAL FUEL GAS/LIGHT-OIL BURNERS AT TWO STAGES SK073516_D_en
BOILER PLATE
Fig. 4 Boiler plate
MODEL L min L max M N
K 4/2 EVO 2 mm 205 226 M10 160
FLAME TUBE LENGTH
Flame tube length must be selected based on the specifications supplied by boiler manufacturer and, in any case, it
must be greater than the thickness of the boiler door included its insulation.
In case of boilers with flame inversion or front flue combustion chambers, it is necessary to insulate the area between
the flame tube and front door with refractory material. This protection material must not impede flame tube extraction.
MODEL TC TL*
K 4/2 EVO 2 mm 250 350
* For different flame lengths, please contact our Technical-Sales Department.
K 4/2 EVO 2
DUAL FUEL GAS/LIGHT-OIL BURNERS AT TWO STAGES SK073516_D_en
PRODUCT SPECIFICATION
SHORT DESCRIPTION
Dual fuel gas/light-oil burners at two stages.
DETAILED SPECIFICATION
Dual fuel gas/light-oil burners at two stages, composed by:
• Aluminium frame;
• Fan at high pressurisation;
• Combustion head with adjustment at high performance and elevated flame stability equipped with blast tube and flame disc;
• Flange and insulating gasket for fixing at boiler;
• Three-phase power supply;
• Manual switch for the fuel selection gas/light-oil;
• Safety air pressure switch to stop the burner in lock-out in case of failed or anomalous fan operation;
• Equipped with gas train with one-block valve A class (1st stage + 2nd stage slow opening + safety), minimum gas pressure switch
and stabiliser filter;
• Optional gas valve proving system VPS;
• Light-oil pump activated by a dedicated motor;
• Optional maximum gas pressure switch;
• UV probe for flame detection;
• Servomotor for air shutter and for the consent of the 2nd stage operation;
• Moving shutter with total closure when idle in order to reduce at the least energy losses related to boiler cooling down;
• IP 40 electric protection level.
CONFORMING TO:
• CE rules;
• 2014/30/UE Directive E.M.C.;
• 2014/35/UE Directive L.V.;
• 2006/42/CE - 2006/42/EG - 2006/42/EC Directive M.D.;
• Directive P.E.D. (art.4, par.3) 2014/68/EU;
• Reference rules: EN676 (gas) - EN267 (liquid fuel) - EN746-2 (industrial thermoprocessing equipment).
STANDARD EQUIPMENT
• Flexible pipes;
• Line filter;
• Isomart gasket;
• Nozzles;
• Flange with insulating gasket;
• Burner nameplate;
• Warranty;
• Instruction handbook for installation, use and maintenance.
OPTIONAL
• Noise protection;
• Antivibration couplings;
• Handle gas taps.
The illustrations and data here shown are indicative. F.B.R. Bruciatori S.r.l. reserves the right to bring, without any obligation of warning, any changes that would be appropriate to the continuing development of their products.
K 4/2 EVO 2
