Data sheet
Automatic balancing valves
ASV-PV DN 50 -100 (3rd gen.)
Description / Application
ASV-PV
DN 50
ASV balancing valves are used for dynamic
hydronic balance in heating and cooling systems.
One of the major challenges in heating and
cooling systems is a lack of good hydronic
balancing, caused by differential pressure, which
is changing constantly and unpredictably in the
system. This often results in complaints about
poor indoor comfort, noise and high energy bills.
ASV automatic balancing valves ensure an
optimal pressure differential for control valves
as well as the correct flow within the individual
risers at all times. The ASV automatically
creates an optimal hydronic balance within the
installation, whether under full or partial load.
This balance is never disrupted.
F low limitation
By using combination of pressure controller ASV
and settable terminal’s unit valve, f low limitation
is established.
F low limitation for each terminal unit prevents
underf lows on distant units and overf lows on
others thus allows efficient pumping.
Lower noise emission
Differential pressure limitation provides the
pressure over the control valve not to increase at
partial loads thus noise emission will be lower.
(This is the reason why DIN 18380 requires
control of differential pressure by partial load.)
No balancing method needed
F low limitation is achieved by adjusting each
hydronic loop separately without inf luencing
others, which consequently results in one time
adjusting process. No special balancing method
is needed so commisioning cost can be saved.
ASV-PV
DN 65-10 0
Partner valve
MSV-F2
DN 50-10 0
Control valve authority
Controlling differential pressure over the control
valve means that authority is high – which allows
an accurate and stable control as well as energy
saving.
Zone balancing
By installing the ASV sets you can divide
the piping system in pressure independent
zones. This allows a gradual connection of
zones to the main in new constructions or
at renovation without using an additional
balancing method. There is no need to perform
a new commissioning every time the system is
changed because the hydronic balance is done
automatically.
ASV-PV valves are settable in different ranges:
• 5-25 kPa setting is mostly used for radiator
application,
• 20-40 kPa setting is used for fan coil, chilled
beam and f lat station applications,
• 35-75 kPa setting is used for f lat station and
fan coil, chilled beam application,
• 60-100 kPa setting is used for large terminal
unit application (air handling units, fan coils,
etc.).
Using ASV valves it is possible to optimize pump
head while independent pressure zones allow to
keep authority of terminal unit’s valve high.
ASV balancing valves are designed to guarantee
high quality of the automatic balancing by:
- a pressure released cone,
- an adapted membrane for every valve
dimension which provide constant quality
performance for all sizes,
- spring with linear characteristic that makes
setting required ∆p easy.
© Danfoss | 2019.04
VD.A6.E7.02 | 1
Data sheet Automatic balancing valves ASV
Description / Application
(continuous)
ASV valves DN 50 is supplied with external
thread only. Threaded or weld tail pieces can be
supplied as an accessory. Dimensions
DN 65-100 are supplied as f langed valves.
ASV balancing valves have integrated service
functions such as shut-off.
ASV-PV can be equipped with plug for f low
measuring. In that case measuring
plugs need to be ordered separately and
There are two basic configurations when using ASV
partner valves (MSV-F2):
• partner valve outside the control loop (Fig. 1).
Recommended configuration: it results in best
performance since whole controlled pressure
range is available to the riser. Flow limitation
is done on each terminal unit in the riser.
MSV-F2, by connecting impulse tube to downflow test plug.
mounted on the valve as follows:
• on top of drain connection (DN 50),
• on the f lange connection before the valve is
filled with water (DN 65-100).
ASV-PV valves are to be mounted in return pipe,
in combination with partner valves mounted
in f low pipe. As a partner valve MSV-F2 is
recommended.
• partner valve inside control loop (Fig. 2).
Offers flow limitation on the riser however
part of the controlled pressure range is used
by pressure drop on partner valve (pi). It is
recommended when flow limitation on each
terminal units is not possible.
MSV-F2, by connecting impulse tube to up-flow
test plug.
Fig. 2 Setting of ASV-PV = priser + piFig. 1 Setting of ASV-PV = ∆priser
Fig. 3 ASV in riser / typical heating application (general e xample)
ASV valves are to be used in heating systems
to control the differential pressure in risers. To
limit the f low for every radiator, the thermostatic
radiator valve with pre-setting facilities (feature)
is used together with a constant pressure
provided by the ASV, thus providing balanced
heat distribution.
Controlling differential pressure over the riser
means also that the valve authority over the
thermostatic radiator valves is high – which
allows an accurate and stable temperature
control and saves energy.
2 | VD.A6.E7.02
© Danfoss | 2019.04
Data sheet Automatic balancing valves ASV
Description / Application
(continuous)
Fig. 4 ASV in manifold for f loor heating system
ASV valves are to be used in f loor heating
systems. To limit the f low for every loop valves
with an integrated f low limiting or presetting
function should be used together with a
constant pressure provided by an ASV-PV valve.
Fig. 5 ASV with fan coil
The ASV valves are to be used in systems with fan
coils, induction devices and air-heaters to secure
an automatic hydronic balance by the means of
differential pressure control in branches or at
every coil.
ASV-PV valves can control the differential
pressure in several ranges if different pressure is
needed.
© Danfoss | 2019.04
Fig. 6 ASV with air handling unit
The ASV valves are to be used in air handling
units to secure an automatic hydronic balance
by the means of differential pressure control at
every unit.
VD.A6.E7.02 | 3
Data sheet Automatic balancing valves ASV
Sizing
Thread
F lange
Q
≤ Q ≤ Q
min
Fig. 7
Column diagram for sizing ASV valves at ∆ pv = 10 kPa. For different ∆pv values use diagram A in Appendix.
We recommend to size the diameter of
ASV-PV valves by using Fig 7. Maximum f low rates
are based on 10 kPa differential pressure over the
valve which allows effcient pumping and saves
energy.
10 kPa
Connection between valves size and pipe size
Kv values per particular dimension were designed
to cover f low range according to VDI 2073 with
water velocity of up 0.8 m/s, at differential
pressure of 10 kPa over the valve. As long as the
water velocity in the pipe is between 0.3 and 0.8
After ASV-PV valves have been sized the same
dimension of partner valve MSV-F2 valve should
m/s dimension of the valve should be equal to
pipe dimension.
be selected.
This rule is derived out of the fact that Kv values
Example:
per particular dimension were designed to cover
f low range according to VDI 2073 at differential
Given:
pressure of 10 kPa over the valve.
Pipe f low 3000 l/h, pipes DN 50
Solution:
Horizontal line intersects the column for the
valve DN 50 which can therefore be selected as
required size.
For detailed sizing see examples on pages 9. For
different pv (differential pressure over the valve)
see diagrams in Appendix A.
4 | VD.A6.E7.02
© Danfoss | 2019.04
Data sheet Automatic balancing valves ASV
Ordering ASV-PV balancing valve, inclusive in the box:
2.5 m impulse tube (G ⁄ A) drain connection (G ⁄ A) and adapter 0 03L8151
k
Typ e DN
VS
(m⁄h) (kPa)
50 20
ASV-PV balancing valve, inclusive in the box:
2.5 m impulse tube (G ⁄ A), adapter ASV large 003Z0691 and 003L8151
k
Typ e DN
VS
(m⁄h) (kPa)
65 48
80 63 003Z0624
100 76.0 003Z0625
65 48
80 63 003Z0634
100 76.0 003Z0635
65 48
80 63 003Z0644
100 76.0 003Z0645
MSV-F2 Partner valve with shut-off, flowlimitation and test plugs.
k
Typ e DN
15 3.1
20 6.3 003Z1086
25 9.0 00 3Z1087
32 15. 5 003Z1088
40 32.3 00 3Z1089
50 53.8 0 03Z10 61
65 93.4 003Z106 2
80 122 .3 003Z1063
100 200.0 003Z1064
1)
For more inform ation see MSV-F2 datasheeet
VS
(m⁄h)
G 2 ⁄
∆p setting range
5-25 003Z0 611
20-40 003Z0621
35-75 003 Z0631
60 -100 003Z0641
∆p setting range
20-40
35-75
60 -100
1)
DN20
Code No.
Code No.
003Z0623
003Z0633
003Z0643
Code No.
003Z1085
Connection
External
thread
ISO 228/1
Connection
F lange
EN 10 92-2
T
MAX.
(°C) (bar)
130 16
Accessories and spare parts
Description Comments/connection Code No.
Shut off knob for MSV-F2
Differential pressure measuring
connector
DN 50 00 3Z0179
DN 65 -100 0 03Z0180
For drain connection 003L8143
1.5 m 00 3L8152
Impulse tube, with O-rings
2.5 m 003Z0690
5 m 00 3L8153
Plastic impulse tube with connectors and
adapters
Adapter large ASV
Plug for connecting impulse tube
O-ring for impulse tube
1)
Recommende d for use with MSV-F2, connected to me asuring hole, it allows conne ction of impulse
tube from ASV w hile retaining measurement f unctionality.
2)
Recommended for use wit h MSV-F2, connected to measuring h ole. Can also be used for connec ting
impulse tube d irectly on the pipe.
3)
Set of 10 pieces.
4)
Total 15 meter of impulse tu be
1)
2)
3)
For making set of 10 pieces 4)003Z0689
G ¼-R ¼; G ⁄ 003Z0691
G ⁄-R ¼ 003L8151
2.90 × 1.7 8 00 3L8175
© Danfoss | 2019.04
Fitting
For valves with external thread Danfoss offers
threaded or welded tailpieces as accessory.
Materials
Nut brass
Tailpiece welding steel
Tailpiece threaded brass
Typ e Comment to pipe to valve Code No.
Tailpiece
threaded
(1 pcs.)
Tailpiece
welding
(1 pcs.)
DN 50 (2 ¼˝) 00 3Z0274
R2
DN 50 (2 ½˝) 003Z0278
DN 50 (2 ¼˝) 003Z0272
DN 50
DN 50 (2 ½˝) 003Z 0276
VD.A6.E7.02 | 5
Data sheet Automatic balancing valves ASV
Technical data
Design
1. Shut-off knob
2. Differential pressure
setting spindle
3. O-ring
4. Reference spring
5. Impulse tube connection
6. Diaphragm element
7. Control diaphragm
8. Pressure-relieved valve cone
9. Valve body
10. Seat
Typ e ASV-P V MSV-F2
Nominal diameter DN 50 -100 50 -100
Max. pressure
Test pressure 25 25
Differential pressure over the valve kPa 10-250
Temperature °C –10 … 120 -10 … 130
Material of parts in contact with water
Valve body Grey cast iron EN-
Cone Stainless steel CW602N
Membrane / O-rings EPDM
Spring Stainless steel -
1)
For more info rmation see MSV-F2 datasheet.
2)
Please note that the m aximum admissible dif ferential pressure across the val ve 250 kPa should also not be exceeded a t partial load.
5-25 20-40 35-75 60 -100
n
(turns)
(kPa) (kPa) (kPa) (kPa)
0 25 40 75 100
1 24 39 73 98
2 23 38 71 96
3 22 37 69 94
4 21 36 67 92
5 20 35 65 90
6 19 34 63 88
7 18 33 61 86
8 17 32 59 84
9 16 31 57 82
10 15 30 55 80
11 14 29 53 78
12 13 28 51 76
13 12 27 49 74
14 11 26 47 72
15 10 25 45 70
16 9 24 43 68
17 8 23 41 66
18 7 22 39 64
19 6 21 37 62
20 5 20 35 60
bar
16 (PN 16) 16 (PN 16)
2)
GJL-250 (GG 25)
Cast iron EN-GJL 250 (GG 25)
1)
10-150
6 | VD.A6.E7.02
Factory presetting
∆p setting range
(kPa)
5-25 10
20-40 30
35-75 60
60 -100 80
Fig. 8 ASV-PV (DN 50)
kPa
DN 50 5
ASV-PV is designed to maintain a constant set
differential pressure. Via an internal connection
and together with the reference spring (4),
pressure in the return pipe acts on the underside
of the control diaphragm (7) while via an impulse
tube (5), pressure in the f low pipe acts on the top
of the diaphragm. In this way the balancing valve
maintains adjusted differential pressure.
The ASV-PV valves are sold in four different p
setting ranges. The valves are factory–set to a
defined value as described on Factory presseting
table on Fig. 8 and 9.
Use the following procedure to set the desired
differential presure:
the setting on ASV-PV can be changed by
turning the setting spindle (2).
Turning the spindle clockwise increases the
setting; turning it counter clockwise reduces the
setting.
If the setting is not known, turn the spindle fully
clockwise. With this the setting on ASV-PV is at
maximum value within setting range. Now turn
the spindle a number of times (n) as described
in Fig. 6, 7 or 8 until the required differential
pressure setting is obtained.
© Danfoss | 2019.04
Data sheet Automatic balancing valves ASV
Design (continuous)
1. Shut-off knob
2. Differential pressure
setting spindle
3. O-ring
4. F l at gasket
5. Reference spring
6. Impulse tube connection
7. Diaphragm element
8. Control diaphragm
9. Pressure-relieved valve cone
10. Valve body
11. Seat
12. Measuring holes-plugged
13. Air-vent
DN
65 13
80 13
100 13
Factory presetting
∆p setting range (kPa) kPa
20-40 30
35-75 60
60 -100 80
20-40 35-75 60-100
n
(turn s)
10 30 65 90
11 29 64 89
12 28 63 88
13 27 62 87
14 26 61 86
15 25 60 85
16 24 59 84
17 23 58 83
18 22 57 82
19 21 56 81
20 20 55 80
(kPa) (kPa) (kPa)
0 40 75 100
1 39 74 99
2 38 73 98
3 37 72 97
4 36 71 96
5 35 70 95
6 34 69 94
7 33 68 93
8 32 67 92
9 31 66 91
(turn s)
21 54 79
22 53 78
23 52 77
24 51 76
25 50 75
26 49 74
27 48 73
28 47 72
29 46 71
30 45 70
31 44 69
32 43 68
33 42 67
34 41 66
35 40 65
36 39 64
37 38 63
38 37 62
39 36 61
40 35 60
(kPa) (kPa) (kPa)
20-40 35-75 60-100
n
© Danfoss | 2019.04
Fig. 9 ASV-PV (DN 65-100)
VD.A6.E7.02 | 7
Data sheet Automatic balancing valves ASV
Design (continuous)
1. Body EN-GJL250
2. Plug
3. Valve cone
3.1 . Seat soft sealing
4. Rod
5. Stroke limiter/Allen screw
6. Gasket
7. Handwheel with display - DN
50 -100 p lastic
8. Fixed screw
9. Spindle
10. Stuffing box
11. Bonn et
12 . Allen screw /Hexagon screw
13. Flat gasket
MSV-F2 DN 50-80
Fig. 10 MSV-F2 DN 50-100
Partner valves MSV-F2 1) are to be used
together with the automatic balancing valves
ASV-PV to control differential pressure in the
risers.
Impulse tube connection
The impulse line must be connected to impulse
tube connection piece (2) (adaptor sold as
accessory). In working position,
one of test plugs needs to be open while other
closed. There are two possible configurations,
with partner valve inside or outside control loop.
It can be chosen by impulse tube connection side:
- Partner valve outside controlled loop:
opened outlet test plug
- Partner valve inside controlled loop: opened
inlet test plug
MSV-F2 DN 100
MSV-F2 is manual presetting and shut-off valves.
The valves have position indicator and stroke
limiter as standard. Hood of spindle is integrated
with stroke limiter. Setting can be locked.
Valves have built in flow limitation
1)
For more inform ation see MSV-F2 datasheet
8 | VD.A6.E7.02
© Danfoss | 2019.04
Data sheet Automatic balancing valves ASV
k
v=
Q
�
∆p
v
=
15
√
0.6
=19.36 m3h⁄
2
Sizing-design examples
Fig . 11
∆pa = ∆pm + ∆pr + ∆pv
Δpv Pressure drop across ASV-PV valve
Δpi Pressure drop across MSV-F2
Δpo Pressure drop across the riser including MSV-F2
Δpa Pressure drop across the riser
Δpr Pressure drop in the riser excluding MSV-F2
1. Example (AHU - air handling unit)
Given:
Desired f low for the riser (Q): .........................15 m3/h
Minimal available pressure
for that riser (∆pa) ...............................................10 0 kPa
Estimated pressure drop over the riser
at the desired f low (∆p0) .................................... 40 kPa
Wanted:
- Valve type
- Valve size
Selection and sizing of automatic balancing
valves for air handling unit. The customer have
choosen ASV-PV with partner valve MSV-F2
inside the control loop is choosen. Since the
calculated pressure drop over the riser is 40 kPa
ASV-PV with setting range between 35-75 kPa is
selected. The minimal available pressure for the
riser is 100 kPa and pressure drop across ASV-PV
(∆pv) will following be 60 Kpa
∆pv = ∆pa−∆p0 = 100−40 = 60 kPa
Based on this calculation ASV-PV DN 65 is
selected with partner valve MSV-F2 also DN65.
Set the valve to 40 kPa, see figure 11 (40kPa = 35
turns). Selection can also be made by reading
from diagram Appendix A. fig A
2. Example (continued AHU - air handling
unit)
Given:
Correcting the flow with the differential pressure
setting.
Desired flow for the riser (Q2): .......................15 m3/h
Measured flow for the riser (Q1) ....................18 m3/h
Estimated pressure drop over the
riser at desired flow (∆pr) ................................. 40 kPa
Required:
Correct flow to 15 m3/h for the riser.
Solution:
Measuring the flow show that it is higher then
what is desired for the riser, this could be caused
by the real pressure drop over the riser is higher
than the estimated 40 kPa, following setting on
the ASV-PV valve can be adjusted to limit the
flow.
P2=P1×
Q
2
=40×
Q
1
15
18
2
=28 kPa
If we decrease the setting from 40 to 28 kPa flow
will be decreased to 15 m3/h.
Alternatively, flow limitation inside the loop
can also be done with MSV-F2 by adjusting the
setting of the valve.
© Danfoss | 2019.04
VD.A6.E7.02 | 9
Data sheet Automatic balancing valves ASV
Measurement of f low and
differential pressure
MSV-F2 is equipped with two test plugs so that
the differential pressure across the valve can be
measured using Danfoss measuring equipment
or any other measuring device. Valve can be
converted to actual f low.
Note: When measuring sized f low, all radiator
valves must be fully open (nominal f low).
Installation ASV-PV must be installed in the return pipe with
f low in the direction of the arrow on thevalve
body. Partner valves (MSV-F2) must be installed
in the f low pipe, with f low in the direction of the
arrow on the valve body. The impulse tube must
be installed between partner valve and ASV-PV.
003L8151
Measurement of differential pressure (Δpr)
across riser.
Fit a measuring connector (Danfoss code no.
003L 8143) on the ASV-PV balancing valve drain
connection (DN 50) or threaded connection
closer to the terminal unit (TU). Measurements
must be taken between the test plug at MSV-F2
valve port B and the measuring connector on the
ASV- PV.
The impulse tube must be f lushed through
before installation. ASV-PV and MSV-F2 must
in addition be installed as determined by
installation conditions.
003Z0691
Fi g. 13
Pressure testing Max. test pressure ............................................... 25 bar
When pressure testing the system you must
secure that both sides of the membrane have the
same static pressure to prevent damage of the
pressure controller. That means the impulse tube
must be connected and any needle valves must
be open.
Starting
During system start – opening the shut-off on
ASV-PV and partner valve-please secure that
there is the same static pressure on both sides or
higher pressure on upper side of the membrane.
If filling is done by opening ASV-PV and partner
valve, please make sure there is a pressure on the
upper side of the membrane by opening partner
valve first before ASV-PV is opened.
10 | VD.A6.E7.02
© Danfoss | 2019.04
Data sheet Automatic balancing valves ASV
Dimensions
ASV-PV
∆p setting range L1 L2 L3 H1 H2 D1 D2 b c
DN
50
kPa mm ISO 228/1
5-25
20-40
35-75
60 -100
130 244 234
232
61 55 133 G 2⁄ G ⁄ A
273
© Danfoss | 2019.04
Fi g. 14
ASV-PV
DN
65
80
100
L1 H1 H2 D1 D2 D3
mm
290 385 93 68 205 145
310 390 100 68 218 160
347 446 112 68 248 180
VD.A6.E7.02 | 11
Data sheet Automatic balancing valves ASV
Appendix A-Sizing diagram
12 | VD.A6.E7.02
Fig. A
Sizing diagram ASV-PV DN 50-100
-
© Danfoss | 2019.04
Data sheet Automatic balancing valves ASV
Appendix A-Sizing diagram
Appendix B
MSV-F Flow diagrams
Fig.B -Sizing diagram MSV-F2 DN 50-100
DN 50 / PN 16 / PN 25
Setting kv-value
1 7.4
2 15. 8
3 26.7
4 36.9
5 46.2
6 53.8
Max. permissible differential pressure
in throttling function 1.5 /2.0 bar.
Max. permissible flow speed: ≤ 4 m/s
Condition:
• The flow must be free of
cavitation.
Flow characteristic
© Danfoss | 2019.04
VD.A6.E7.02 | 13
Data sheet Automatic balancing valves ASV
Appendix B (continued)
MSV-F Flow diagrams
DN 65 / PN 16 / PN 25
Setting kv-value
1 2.6
2 8.8
3 21.6
4 39.0
5 49.8
6 58.5
7 69.3
8 79.0
9 8 7.8
9.5 93.4
Max. permissible differential pressure
in throttling function 1.5 /2.0 bar.
Max. permissible flow speed: ≤ 4 m/s
Condition:
• The flow must be free of
cavitation.
Flow characteristic
DN 80 / PN 16 / PN 25
Setting kv-value
1 5.8
2 9.9
3 24.5
4 48.5
5 71.3
6 8 7.0
7 96.4
8 109. 3
9.5 122. 3
Max. permissible differential pressure
in throttling function 1.5 /2.0 bar.
Max. permissible flow speed: ≤ 4 m/s
Condition:
• The flow must be free of
cavitation.
Flow characteristic
14 | VD.A6.E7.02
© Danfoss | 2019.04
Data sheet Automatic balancing valves ASV
Appendix B (continued)
MSV-F Flow diagrams
DN 100 / PN 16 / PN 25
Setting kv-value
1 8.3
2 32.4
3 72.9
4 107. 2
5 128 .2
6 152.8
7 180.0
8 200.0
Max. permissible differential pressure
in throttling function 1.5 /2.0 bar.
Max. permissible flow speed: ≤ 4 m/s
Condition:
• The flow must be free of
cavitation.
Flow characteristic
© Danfoss | 2019.04
VD.A6.E7.02 | 15
Danf
already on order pro
All trademarks in this material are property of the respec
Data sheet Automatic balancing valves ASV
ASV-PV tender text
1. Tender text
a.
Product is differential pressure controller for automatic hydronic balance of heating and cooling systems.
b. The differential pressure controller should be based on integrated membrane element.
c. Valves should have shut-off function separated from the setting mechanism. Shut-off service
function should be possible with a hand knob.
d. The setting of differential pressure should be hidden to prevent unauthorized change of setting.
e. The differential pressure setting should be linear throughout the setting range (1 turn 1 kPa or 1
turn 2 kPa depending on dimension).
f.
Packaging of differential pressure controller should contain impulse tube (1.5 m)
g. Valve should be delivered in reliable packaging for safe transport and handling.
2. Product characteristics:
a. Pressure class: PN 16
b. Temperature range: −10 … +120 °C.
c. Connection size: DN 50-100
d. Connection type (depending on dp setting range): External thread ISO 228/1 (DN15-50) and
Flange EN 1092-2 (DN 65-100)
e. p setting range: 5-25 kPa (DN 50), 20-40 kPa (DN 50-100), 35-75 kPa (DN 50-100) and 60-100 kPa
(DN 65-100).
f. Installation: differential pressure controller should mounted on return pipe with connection via
impulse tube to supply pipe.
Nominal diameter: _ _ _ _ _ _
Connection: _ _ _ _ _ _
Adjustment range from-to: _ _ _ _ _ _ kPa
Produced by: Danfoss Type: ASV-PV
Ordering no.: 003L_ _ _
oss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products
vided that such alterations can be made without subsequential changes being necessary eady agreed.
16 | VD.A6.E7.02
tive companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
© Danfoss | DHS-SRMT/SI | 2019.04
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