MD series boilers

MD series boilers intended use (are used) for heating of large sized residential and industrial premises and supplying heat for technological needs. Fuel used: wood pellets or wood briquettes up to 50mm diameter.

These boilers are manufactured as a modification to K series with a mounted wood pellet/briquette burner of a corresponding output with it’s own fuel supply augers.

When pellets are not available boiler may be stoked manually with any type of solid fuel.

Boiler burner is delivered with pellet or pellet/briquette supply augers. Fuel hoppers are delivered separately.

Boiler model

K-100MD

K-140MD

K-190MD

K-250MD

K-320MD

K-400MD

K-500MD

Boiler tipe 

Solid fuel fired hot water generator with automated burner (smoke tubes)

Nominal heating capacity (QN),  kW

95

140

190

250

320

400

500

Minimal heating capacity (Qmin),  kW

30

42

57

75

96

120

150

Efficiency of boiler not less than, %

85

85

85

85

85

85

85

Types of fuel

Fire wood, wood waste, coal or burner fuel

   

Fuel consuption, kg/h

24

34

46

60

77

97

121

Door dimensions B x H, mm:

400×450

400×450

600×620

600×620

600×620

600×620

600×620

Combustion chamber

H, mm

620

620

770

770

900

900

1100

B, mm

500

520

770

770

900

900

900

L, mm

730

1000

1100

1500

1300

1500

1700

capacity, dm3  (1)

226

320

590

800

1050

1210

1680

Aerodynamic resistance, at QN, no more than, Pa

75

105

135

150

215

225

260

Temperature of combustion gases escaping from boiler, °C

213

213

213

213

213

213

213

Gas emission m3/val.

418

591

800

1044

1340

1688

2105

Smoke exhaust pipe dimensions, mm

240×240

240×240

240×240

Ø350

Ø350

Ø380

Ø380

Operating water pressure, MPa (bar)

6 (0,6)

6 (0,6)

6 (0,6)

6 (0,6)

6 (0,6)

6 (0,6)

6 (0,6)

Minimum return water temperature during
operation, ºC

60

60

60

60

60

60

60

Maximum operating temperature of the water in
the boiler, ºC

110

110

110

110

110

110

110

Water debit, at Δt =20 ºC, t/h

4,26

5,97

8,11

10,68

13,67

17,09

21,37

Min debit, t/h

2,87

4,01

5,45

7,17

9,17

11,46

14,33

Hydraulic resistance at Δt =20 ºC, mm H2O st

0…370

0…380

0…390

0…402

0…422

0…430

0…430

Boiler water capacity, m³

0,22

0,27

0,53

0,68

0,94

1,12

1,3

Boiler heating surface, m²

5,1

6,9

9,6

12,4

15,9

19,8

24,8

Connection pipes

conditional diameter, mm (inches)

68 (2,5″)

65 (2½”)

65 (2½”)

65 (2½”)

80 (3″)

80 (3″)

80 (3″)

flange, Ø mm

160

160

160

160

185

185

185

Weight no more than, kg

800

900

1100

2200

2800

3100

3900

Boiler type
K-140MD K-190MD K-250MD K-320MD K-400MD K-500MD
H, mm 1940 2260 2260 2680 2830 2830
B, mm 1000 1200 1200 1400 1400 1400
L, mm 1620 1950 2150 2400 2600 2760
A, mm 710 890 890 1090 1090 1090
C, mm 1125 1600 1600 1600 1670 1770
D, mm 380 380 380 480 480 480
E, mm 1600 1900 1900 2220 2220 2370
F, mm 674 780 780 780 780 780
G, mm 1120 1300 1300 1490 1490 1640
K, mm 415 540 540 540 540 540
M, mm 260 270 270 380 380 380
T, mm ø65 ø65 ø65 ø80 ø80 ø80
P, mm 240×240 290×290 290×290 ø325 ø325 ø325
R, mm 1614 1728 1728 1728 1900 1900

Recommended connection to the heating system diagram:

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