DKH 512

The DKH 512 is a flow and differential pressure controller with a wide range of applications. Perfect for use in district heating substations, central heating and air-conditioning systems. Compact, and featuring an electrophoretically painted ductile iron body for optimum rust protection, the DKH 512 also features two inline valves that keep noise to a minimum. A manual shut-off function ensures easy maintenance.

Product Information

Flow and differential pressure controller

The DKH 512 is a flow and differential pressure controller with a wide range of applications. Perfect for use in district heating substations, central heating and air-conditioning systems. Compact, and featuring an electrophoretically painted ductile iron body for optimum rust protection, the DKH 512 also features two inline valves that keep noise to a minimum. A manual shut-off function ensures easy maintenance.

Technical description

Application:

District heating substations, primary side, as well as in central heating and air-conditioning.
Heating and cooling systems with variable flow.

Function:

Differential pressure control over the load and flow control.
Closes at increasing flow or Δp.

Dimensions:

DN 15-80

Pressure class:

PN 25

Max. differential pressure (ΔpV):

1600 kPa = 16 bar

Pressure drop in the throttle (Fc):

12, 20 or 40 kPa.

Setting range:

Differential pressure fixed at 15, 40, 60 or 100 kPa.

Temperature:

Max. working temperature: 120°C
Min. working temperature: -10°C

Media:

Water and neutral fluids, water-glycol mixtures.

Material:

Valve body: Ductile iron EN-GJS-400
Diaphragms and gaskets: EPDM

Surface treatment:

Electrophoretic painting.

Marking:

TA, DN, PN, Kvs, Δp, Material and flow direction arrow.

Flanges:

DN 15-50 (optional): According to EN-1092-2:1997, type 16.
DN 65-80: According to EN-1092-2:1997, type 21.

Product Articles

Articles

DN 15-50

1200 mm capillary pipe (Ø6) with compression coupling 1/4" included.

Fc = 12 kPa

DN
d
L
H1
H2
Kvd
qmax [m3/h]
Kg
Article No
15 kPa
15/20
G1
123
45
92
7,0
1,1
1,6
52 757-020
25/32
G1 1/4
145
53
97
18
3,3
2,7
52 757-025
40/50
G2
190
66
110
40
7,5
4,8
52 757-040
40 kPa
15/20
G1
123
45
92
7,0
1,1
1,6
52 757-120
25/32
G1 1/4
145
53
97
18
3,3
2,7
52 757-125
40/50
G2
190
66
110
40
7,5
4,8
52 757-140
60 kPa
15/20
G1
123
45
92
7,0
1,1
1,6
52 758-120
25/32
G1 1/4
145
53
97
18
3,3
2,7
52 758-125
40/50
G2
190
66
110
40
7,5
4,8
52 758-140
100 kPa
15/20
G1
123
45
92
7,0
1,1
1,6
52 758-020
25/32
G1 1/4
145
53
97
18
3,3
2,7
52 758-025
40/50
G2
190
66
110
40
7,5
4,8
52 758-040

Fc = 20 kPa

DN
d
L
H1
H2
Kvd
qmax [m3/h]
Kg
Article No
15 kPa
15/20
G1
123
45
92
7,0
1,3
1,6
52 757-220
25/32
G1 1/4
145
53
97
18
4,4
2,7
52 757-225
40/50
G2
190
66
110
40
10
4,8
52 757-240
40 kPa
15/20
G1
123
45
92
7,0
1,3
1,6
52 757-320
25/32
G1 1/4
145
53
97
18
4,4
2,7
52 757-325
40/50
G2
190
66
110
40
10
4,8
52 757-340
60 kPa
15/20
G1
123
45
92
7,0
1,3
1,6
52 758-220
25/32
G1 1/4
145
53
97
18
4,4
2,7
52 758-225
40/50
G2
190
66
110
40
10
4,8
52 758-240
100 kPa
15/20
G1
123
45
92
7,0
1,3
1,6
52 758-320
25/32
G1 1/4
145
53
97
18
4,4
2,7
52 758-325
40/50
G2
190
66
110
40
10
4,8
52 758-340

Fc = 40 kPa

DN
d
L
H1
H2
Kvd
qmax [m3/h]
Kg
Article No
15 kPa
15/20
G1
123
45
92
7,0
1,8
1,6
52 757-420
25/32
G1 1/4
145
53
97
18
6,0
2,7
52 757-425
40/50
G2
190
66
110
40
14
4,8
52 757-440
40 kPa
15/20
G1
123
45
92
7,0
1,8
1,6
52 757-520
25/32
G1 1/4
145
53
97
18
6,0
2,7
52 757-525
40/50
G2
190
66
110
40
14
4,8
52 757-540
60 kPa
15/20
G1
123
45
92
7,0
1,8
1,6
52 758-420
25/32
G1 1/4
145
53
97
18
6,0
2,7
52 758-425
40/50
G2
190
66
110
40
14
4,8
52 758-440
100 kPa
15/20
G1
123
45
92
7,0
1,8
1,6
52 758-520
25/32
G1 1/4
145
53
97
18
6,0
2,7
52 758-525
40/50
G2
190
66
110
40
14
4,8
52 758-540

DN 65-80

DN 65-80 also fit PN 16 flanges.
1500 mm capillary pipe (Ø6) with compression coupling 1/4" included.

Fc = 12 kPa

DN
L
D
Kvd
qmax [m3/h]
Kg
Article No
15 kPa
65
290
220
60
15
30
52 757-065
80
310
220
60
18
32
52 757-080
40 kPa
65
290
220
60
15
30
52 757-165
80
310
220
60
18
32
52 757-180
60 kPa
65
290
220
60
15
30
52 758-165
80
310
220
60
18
32
52 758-180
100 kPa
65
290
220
60
15
30
52 758-065
80
310
220
60
18
32
52 758-080

Fc = 20 kPa

DN
L
D
Kvd
qmax [m3/h]
Kg
Article No
15 kPa
65
290
220
60
20
30
52 757-265
80
310
220
60
24
32
52 757-280
40 kPa
65
290
220
60
20
30
52 757-365
80
310
220
60
24
32
52 757-380
60 kPa
65
290
220
60
20
30
52 758-265
80
310
220
60
24
32
52 758-280
100 kPa
65
290
220
60
20
30
52 758-365
80
310
220
60
24
32
52 758-380

Fc = 40 kPa

DN
L
D
Kvd
qmax [m3/h]
Kg
Article No
15 kPa
65
290
220
60
26
30
52 757-465
80
310
220
60
32
32
52 757-480
40 kPa
65
290
220
60
26
30
52 757-565
80
310
220
60
32
32
52 757-580
60 kPa
65
290
220
60
26
30
52 758-465
80
310
220
60
32
32
52 758-480
100 kPa
65
290
220
60
26
30
52 758-565
80
310
220
60
32
32
52 758-580

→ = Flow direction

Kvd = Is the Kv value of the differential pressure control component when fully open, used to calculate the minimum pressure drop necessary for the valve to operate according to the formula found under "Sizing".

Connections for DN 15-50

With female thread

Threads according to ISO 228

d1
d2
L1*
EAN
Article No
G1
G1/2
26
3831112501027
52 759-015
G1
G3/4
32
3831112501034
52 759-020
G1 1/4
G1
47
3831112501041
52 759-025
G1 1/4
G1 1/4
52
3831112501058
52 759-032
G2
G1 1/2
52
3831112503489
52 759-040
G2
G2
64,5
3831112503205
52 759-050

With female thread Rc

Threads according to ISO 7-1

d1
d2
L1*
EAN
Article No
G1
Rc1/2
26
3831112527454
52 751-301
G1
Rc3/4
32
3831112527461
52 751-302
G1 1/4
Rc1
47
3831112527478
52 751-303
G1 1/4
Rc1 1/4
52
3831112527485
52 751-304
G2
Rc1 1/2
52
3831112527492
52 751-305
G2
Rc2
64,5
3831112527508
52 751-306

With male thread

Threads according to ISO 7

d1
d2
L1*
EAN
Article No
G1
R1/2
34
3831112500983
52 759-115
G1
R3/4
40
3831112500990
52 759-120
G1 1/4
R1
40
3831112501003
52 759-125
G1 1/4
R1 1/4
45
3831112501010
52 759-132
G2
R1 1/2
45
3831112503342
52 759-140
G2
R2
50
3831112503472
52 759-150

For welding

d1
D
L1*
EAN
Article No
G1
20,8
37
3831112500945
52 759-315
G1
26,3
42
3831112500952
52 759-320
G1 1/4
33,2
47
3831112500969
52 759-325
G1 1/4
40,9
47
3831112500976
52 759-332
G2
48,0
47
3831112501140
52 759-340
G2
60,0
52
3831112501294
52 759-350

With flange

d1
d2
D
L1*
EAN
Article No
G1
M12
95
10
3831112501065
52 759-515
G1
M12
105
20
3831112501072
52 759-520
G1 1/4
M12
115
5
3831112504318
52 759-525
G1 1/4
M16
140
15
3831112501096
52 759-532
G2
M16
150
5
3831112504325
52 759-540
G2
M16
165
20
3831112501317
52 759-550

With flange (extended)

Attention! Must be used on the inlet side.

d1
d2
D
L1*
EAN
Article No
G1
M12
95
47
3831112501157
52 759-615
G1
M12
105
47
3831112500136
52 759-620
G1 1/4
M12
115
62
3831112503533
52 759-625
G1 1/4
M16
140
62
3831112526129
52 759-632
G2
M16
150
72
3831112505025
52 759-640
G2
M16
165
72
3831112503892
52 759-650

*) Fitting length (from the gasket surface to the end of the connection).

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