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STV DN 10-50, Balancing valve

• High accuracy

• Easy to adjust

• Quick to commission

• Dimension: DN 10-50

• Temperature: -20°C till +120°C

• Pressure class: PN 20

February 2014

Description STV (M,F,G) DN 10-50

ApplicationThe manual balancing valve STV (M,F,G) is optimized for use in DHWC, heating- and cooling systems.

SizingSTV (M,F,G) are sized with nomogram, handwheel or online Applications on smartphones or on our webside. STV (M,F,G) shall be choosen with 50-80 % open plug for the design fl ow.Minumum recommended differential pressure is 2 kPa (0,29 psi)

SettingThe hand wheel has digital reading which shows whole turns and tenth of a turn. The setting is shown in table format or can be calculated by using software on the website. Any setting can be locked to avoid destroying the balancing value.An Allen key of 3 mm is used on the inner spindle to lock the setting.When the hand wheel is locked the valve cannot be opened to a larger value but it can be closed for maintenance of the connected circuit.

MeasuringThe pressure test ports are opened by unscrewing the lids. Differential pressure can be measured using a balancing instrument.

DrainingSTVM is equipped with a drain. The drain is opened with a screw driver.

InsolationSTVF Is equipped with extra long PT ports.

MountingMounting direction is clearly shown with an arrow on STV (M,F,G) STV has internal threads. STVG has external threads.

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Technical data STV (M,F,G) DN 10-50

Pressure classPN 20Max temperature Min temperature120°C -20°CMax closing pressure Min pressuredrop200 kPa 2 kPaMaterial Dezincifi cation resistance brass Gaskets EPDM

Capacity

No. turns DN 10 DN 15 DN 20 DN 25 DN 32 DN 40 DN 50

1 0,11 0,18 0,34 0,48 0,79 1,20 2,002 0,18 0,32 0,60 0,77 1,32 2,05 3,603 0,27 0,45 0,83 1,03 1,80 2,80 5,204 0,41 0,62 1,13 1,50 2,70 4,10 7,605 0,65 0,86 1,55 2,30 4,10 6,20 11,906 1,02 1,17 2,10 3,60 5,90 8,90 16,707 1,78 1,62 2,90 5,00 7,80 12,00 21,208 2,30 2,55 3,85 6,50 9,70 14,70 25,009 2,60 3,15 4,50 7,90 11,50 17,10 28,6010 2,80 3,55 5,10 8,80 13,10 19,50 31,50

1 2 3 4 5 6 7 8 9 10Pre-setting No of turns

Accuracy ±%16

14

12

10

8

6

4

2

Accuracy

February 2014

Setting STV (M,F,G) DN 10-50

0,02

2.5

0,1

1,0

0,2

2 ,0

0,03

0,3

0,04

0,4

0,05

0,5

0,07

0,1

0,7

1

0,15

0,2

0,25

0,3

0,35

0,4

0,5

0,45

0,6

6

4,5

5

4

3,5

3

2,5

2

1,5

10

7

100

0,05

0,07

0,1

0,15

0,2

0,25

0,3

0,4

0,5

0,7

1

1,5

2

2,5

3

4

10

7

5

25

15

20

40

30

50

70

1

100

25

4

3

2

5

6

7

10

70

20

50

60

40

30

150

1

2

3

4

5

6

7

8910

1

2

3

4

5

6

7

8

910

DN 10 DN 15 DN 20 DN 25 DN 32 DN 40

1

2

3

4

5

6

7

8

910

DN 50

1

2

3

4

5

6

7

8

910

1

2

3

4

5

6

7

8

910

kPa

1

2

3

4

5

6

7

8

910

1

2

3

4

5

6

7

8910

m /hl/s3

kv

Pressure drop Water flow

Handwheel setting

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Dimensions mm

Product Information STV (M,F,G) DN 10-50

Dim A B C Weight/kg

STV 10 DN 10 80 108 95 0,45

STV 15 DN 15 86 111 95 0,53

STV 20 DN 20 90 114 95 0,58

STV 25 DN 25 102 120 96 0,77

STV 32 DN 32 120 127 96 1,20

STV 40 DN 40 132 139 108 1,50

STV 50 DN 50 154 148 111 2,30

DN 25

PN 20

C

A

B

Media °CEthyleneglycol 100°C

Propyleneglycol 60°C

Glycerol (Propantriol) 100°C

Potash (diluted) 40°C

Potassium acetate (diluted) 20°C

Calcium chloride dihydrate (diluted) 100°C

Magnesium chloride (diluted) 100°C

Sodium chloride 100°C

Temper 60°C

MediaMaximum temperature with another media then water.