Balancing valve STV 65-150
Pre-setting
By means of the wheel the valve is set at the
desired flow or kv-value according to the diagram.
For a larger diagram see page 4:50.
When the value of the valve is set, it is locked.
This is done by screwing down the inner spindle
to its end position with a 4 mm Allen key. After
locking, the valve can still be closed but cannot
however be opened at a higher kv value than the
one set.


Diagram
(click to enlarge)



kv-value
No. of turns DN65 DN80 DN100 DN125 DN150

1
2
3
4
5
6
7
8
9
10

2,8
5,1
9,6
20,0
35,5
51,0
66,0
78,5
87,0
93,5 		5,5
9,5
13,5
18,5
29,5
49,0
68,5
85,0
98,0
110,0 		8,0
13,5
19,0
33,0
67,0
99,5
125,0
150,0
170,0
190,0 		10,0
22,0
33,0
63,0
106,0
150,0
194,0
236,0
273,0
301,0 		18,0
33,0
68,0
130,0
186,0
246,0
294,0
340,0
385,0
425,0


Flow measuring

The measuring instrument is connected to the
measuring socket of the valve. The instrument is
pre-programmed with the characteristics of all our
adjustment valves and proving rings.
Other valve manufacturers� data is also included in
the instrument. Values for pressure drop and flow
can be read directly on the display.
If you do not have access to the MMA instrument
some other brands can be used. The flow can then
be read from the pressure drop diagram found in
the operating instructions.

Accuracy
Accuracy is greatest when the valve is fully open.
The smaller the opening, the importance of manufacturing tolerances increases, as variations in
measurements are then greater percentage-wise. It
is better to choose a valve that has a pre-set value
above three turns.






We reserve the right to alter information without notice
AB Markaryds Metallarmatur • 285 32 Markaryd
Tel 0433-73700 • Fax 0433-73798 • E-mail [email protected] � www.mma.se
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