Vacuum hot water boilers

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Vacuum hot water boilers

Vacuum hot water boilers

Vacuum hot water boilers SEV Series SEV-100/150/200/250/300/400/500/600/800/1000/1300/1600/2000

Vacuum hot water boilers for a new, easy-to-use way to heat for hot water supply
Safety design
There is no need to worry about expansion, rupture, or explosion because the tube body is always kept in a vacuum below atmospheric pressure, and there is no low water level accident because the heat medium water is contained in a certain amount, and 4 safety devices such as vacuum pressure switch, thermostat, fusible plug, and overheating prevention switch are installed as standard.
Long lifespan design
The heat exchanger is a U-shaped tube flange type made of stainless steel pipes. The thermal water inside the tube repeats a certain cycle (heat water > decompression steam > heat exchange > condensation > heat water), so it does not require make-up water and is heated by dissolved oxygen. It maintains a long lifespan without worrying about corrosion or scale accumulation.
High-efficiency design
The main body adopts the structural characteristics of a shell-and-tube type once-through boiler, so the furnace has a water-cooled wall structure, and the heat absorption surface has a three-pass combustion structure, pursuing high performance and reducing heat fuel costs through high-efficiency design.
No license and no inspection
Anyone can operate without a license or inspection required.
Heat exchange method in multipurpose circuit
Since it has heating, hot water supply, and hot water circulation methods, it can be used as a multipurpose circuit for each purpose. Additionally, since each heat exchanger is independent, there is no mixing of water and installation and construction are simple.
Artificial intelligence control device
When equipped with the artificial intelligence control device SE-AI system, operation and maintenance become easier. (options)
Operating principle of SEV type vacuum hot water boiler
  • SEGWANG's SEV type vacuum hot water boiler adopts the structural characteristics of a multi-tube once-through boiler to a water-tube boiler, and the furnace has a water-cooled wall and is burned by a burner attached to the front, and the combustion gas transfers heat to the heating surface of the three-path water pipe to heat the heat medium water in the water pipe.
  • A certain amount of heat medium water is enclosed in the pipe body and maintained under vacuum, so when the heat medium water is heated, it immediately becomes decompressed steam and transfers heat to the heat exchanger for heating, hot water supply, and hot water supply circulation. The heat exchanger is not directly heated by a burner, but is indirectly heated by the condensation heat of the decompressed steam.

Product standard specifications performance table

Item＼Type Unit SEV-100 SEV-150 SEV-200 SEV-250 SEV-300 SEV-400 SEV-500 SEV-600 SEV-800 SEV-1000 SEV-1300 SEV-1600 SEV-2000
Tube heat output MW 0.12 0.17 0.23 0.29 0.35 0.47 0.58 0.7 0.93 1.16 1.51 1.86 2.33
kcal/h 100,000 150,000 200,000 250,000 300,000 400,000 500,000 600,000 800,000 1,000,000 1,300,000 1,600,000 2,000,000
Heat transfer area ㎡ 6.1 6.4 8.2 8.8 9.3 11.3 12.8 14.2 16 22 25 28 30
Control method - ON-OFF HIGH-LOW-OFF
Power used V 220V×1Ø 220V×3Ø / 380V×3Ø×4W
Total power consumption ㎾ 0.25 0.25 0.25 0.4 0.4 0.75 0.75 2.2 2.6 4.1 7 9 12.5
Heat medium quantity ℓ 140 160 165 185 260 380 400 420 480 520 560 580 620
Product Weight ㎏ 710 750 760 840 880 1,420 1,530 1,820 2,080 2,720 3,200 3,700 4,300
Fuel consumption Diesel ㎏/h 10.7 16 21.3 26.7 32 42.6 53.3 64 85.2 107 138 170.7 213.3
City Gas (13A) N㎥/h 11.1 16.7 22.2 27.8 33.3 44.4 55.5 66.6 88.8 111 144.3 177.6 222
LPG (Propane) N㎥/h 4.9 7.4 9.8 12.3 14.7 19.6 24.5 29.4 39.2 49.1 63.8 78.5 98.2
㎏/h 9.9 14.9 19.8 24.8 29.7 39.6 49.5 59.5 79.3 99.2 128.9 158.6 198.3
LPG (Butane) N㎥/h 3.8 5.8 7.7 9.7 11.6 15.4 19.3 23.2 30.9 38.7 50.3 61.9 77.3
N㎥/h 10 15.1 20.1 25.1 30.1 40.2 50.2 60.3 80.4 100.5 130.7 160.8 201
Connection diameter Fueling inlet A 8 8 15 15 15 15 20 20 20 20 25 25 25
Gas inlet A 20 20 25 32 50 50 50 50 50 50 50 50 50
Flue Ø㎜ 200 200 200 250 250 250 300 300 350 400 400 450 500
Appearance Width(W) ㎜ 1,050 1,140 1,140 1,160 1,160 1,280 1,280 1,290 1,420 1,580 1,650 1,820 2,100
Length(L) ㎜ 1,880 2,100 2,130 2,320 2,340 2,660 2,960 2,960 3,360 3,380 3,460 3,650 3,940
Height(H) ㎜ 1,650 1,680 1,700 1,840 1,860 1,940 1,940 1,950 1,960 2,250 2,400 2,460 2,560

For heating and hot water circulation
(60℃~70℃, 50℃~70℃ for SEV-1300 and above)

Item＼Type Unit SEV-100 SEV-150 SEV-200 SEV-250 SEV-300 SEV-400 SEV-500 SEV-600 SEV-800 SEV-1000 SEV-1300 SEV-1600 SEV-2000
Rated heat output kcal/h 100,000 150,000 200,000 250,000 300,000 400,000 500,000 600,000 800,000 1,000,000 1,300,000 1,600,000 2,000,000
Circulating amount ㎥/h 10 15 20 25 30 40 50 60 80 100 65 80 100
Max. Operating water head pressure mAq 100 (10kg/㎠)
Head pressure loss mAq 1.2 1.5 1.7 2 2.1 2.1 2.2 2.6 3 3.2 3 3.2 3.5
Heat exchanger Material Stainless steel pipe
Heating inlet/outlet diameter A 40 50 50 65 65 80 80 100 100 125 125 125 150

For hot water supply (5℃~65℃)

Item＼Type Unit SEV-100 SEV-150 SEV-200 SEV-250 SEV-300 SEV-400 SEV-500 SEV-600 SEV-800 SEV-1000 SEV-1300 SEV-1600 SEV-2000
Rated heat output kcal/h 100,000 150,000 200,000 250,000 300,000 400,000 500,000 600,000 800,000 1,000,000 1,300,000 1,600,000 2,000,000
Amount of hot water ㎥/h 1.7 2.5 3.3 4.2 5 6.6 8.3 10 13.3 16.7 21.7 26.7 33.3
Max. Operating water head pressure mAq 100 (10kg/㎠)
Head pressure loss mAq 0.5 0.7 0.8 1.1 1.1 1.2 1.4 1.8 1.8 2.0 2.2 3.2 3.6
Heat exchanger Material Stainless steel pipe
Hot water inlet and outlet diameter A 20 20 25 25 32 32 40 40 50 65 65 80 80

For hot water supply (25℃~65℃)

Item＼Type Unit SEV-100 SEV-150 SEV-200 SEV-250 SEV-300 SEV-400 SEV-500 SEV-600 SEV-800 SEV-1000 SEV-1300 SEV-1600 SEV-2000
Rated heat output kcal/h 100,000 150,000 200,000 250,000 300,000 400,000 500,000 600,000 800,000 1,000,000 1,300,000 1,600,000 2,000,000
Amount of hot water ㎥/h 2.5 3.75 5 6.25 7.5 10 12.5 15 20 25 32.5 40 50
Max. Operating water head pressure mAq 100 (10kg/㎠)
Head pressure loss mAq 0.7 0.9 1.1 1.2 1.2 1.4 1.8 2.0 2.0 2.2 2.6 3.4 3.6
Heat exchanger Material Stainless steel pipe
Hot water inlet and outlet diameter A 20 25 32 32 32 40 50 50 65 65 80 100 100

The above specification performance table is based on the following :

  • Low calorific value of fuel
    1. Diesel : 43.12MJ/kg (10,300kcal/kg)
    2. City Gas (13A) : 41.45MJ/Nm3 (9,900kcal/Nm3)
    3. Propane : 93.7MJ/Nm3 (22,380kcal/Nm3)
    4. Butane : 118.9MJ/Nm3 (28,400kcal/N㎥), 45.76MJ/N㎥ (10,930kcal/Nm3)
  • Supply pressure of gaseous fuel
    1. SEV-100 through SEV-600 have a low pressure of 1.96 to 2.45 KPa (0.98 KPa minimum) [200 to 250 mmH2O (100 mmH2O minimum)]
    2. SEV-800 types and above are rated for medium pressure 34.32±9.81KPa [3500±1000mmH2O]
  • The rated heat output for heating and hot water supply is when each is operated independently, and when operated simultaneously, the sum of them is the pipe heat output.
  • This specification performance table may be changed without notice for quality improvement.
view table

Sekwang Boiler Co.,Ltd.Sekwang Boiler Co.,Ltd.