Danfoss ASV-PV, ASV-BD, ASV-M Data sheet

Data sheet
Automatic balancing valves
ASV DN 15-50 (4th gen.)
ASV-PV ASV-BD ASV-M DN 15-50 DN 15-50 DN 15-50
Description
ASV whiteboa rd animation
ASV valves are automatic balancing valves. Together with Danfoss presetting radiator thermostatic valves they are part of the Danfoss two-pipe solution and are perfect for creating optimal hydronic balance in residential two-pipe heating systems.
One of the major challenges in heating systems is a lack of good hydronic balancing, caused by differential pressure, which is changing constantly and unpredictably in the heating system. This results in complaints from residents about poor indoor comfort, noise and high energy bills.
Trying to solve these complaints, larger pumps are often installed to improve - especially under heated - circulation of the water. Unfortunately, this affects pressure differentials and energy consumption within the system even more. Besides, the higher pressure differential, the greater the noise from the system, particularly from radiator valves.
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. This is the reason why DIN 18380 requires control of differential pressure at partial loads. The ASV automatically creates an optimal hydronic balance within the installation, whether under full or partial load. This balance is never disrupted.
The ASV valves can also be used in cooling applications (fan coil, chilled beam, etc) with variable flow, to secure an automatic hydronic balance (see general ASV datasheet for details).
Benefits
Installing an ASV combination ensures:
• Fewer complaints: ASV makes the system more reliable, with less disturbances such as noisy radiators, under heating of rooms far away from the heat source, or over-heating of rooms close to the heat source. Fewer complaints means less call-backs to installer to solve the complaints.
• Improved indoor comfort:
ASV provides stable pressure conditions to radiator or floor heating control valves resulting in more accurate room temperature control.
• Lower energy bills: Higher energy efficiency is contributed by solving overheating problem and ensuring more accurate temperature control. Proper balance prevents overflows thus resulting in low return water temperature, which improves energy efficiency of condensing boilers and district heating systems.
• Simplicity:
ASV divides the piping system in pressure independent zones, typically individual risers or apartments so complex and time consuming calculation and commissioning methods are not needed anymore. It also allows a gradual connection of zones to the main constructions without additional balancing.
• Ease of use: The new generation of ASV automatic balancing valves is even simpler to use than
before. The improved setting scale can now be set without using an allen key, saves time for the installer during commissioning and maintenance of the system while new flushing function saves time during flushing of pipe network.
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Data sheet Automatic balancing valves ASV
Applications ASV balancing valves are designed to guarantee
high quality of automatic balancing by:
a pressure released cone,
an adapted membrane for valve dimension
which provides constant quality performance for all sizes,
linear and accurate setting scale that makes setting required ∆p easy.
• low required 10 kPa pressure drop on ASV-PV valve contributes to smaller pump head.
The Danfoss ASV solution comprises an automatic balancing valve ASV-PV and an associated partner valve (Fig. 1 and 2). The ASV­PV is a differential pressure controller, fitted into the return pipe. The partner valve is fitted into the supply pipe. Both valves are connected to each other using a mpulse tube.
There are two basic configurations when using ASV partner valves:
Partner valve outside the control loop (Fi g .1). Recommended valve ASV-BD (default configuration: blue test plug needs to be open, red is in closed position) or ASV-M: 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 (for example, RA-N with presetting on radiator, etc).
The pressure controller has a factory setting of 10 kPa or 30 kPa, perfect for typical radiator based heating systems. Of course it can easily be adjusted to another setting using the setting scale. If the pressure differential tends to become greater than this setting, then the ASV automatic balancing valve immediately reacts and keeps the pressure differential constant. By this the pressure in the controlled riser or loop does not increase due to any system load changes.
ASV balancing valves have integrated service functions such as: *Flushing *shutt-off *draining Shut-off function is separated from the setting mechanism.
Partner valve inside the control loop (Fig.2). Recommended valve ASV-BD (red test plug needs to be open, blue is in closed position): Offers flow limitation on the riser however part of the controlled pressure range is used by pressure drop on partner valve (∆pp). It is recommended when flow limitation on each terminal is not possible.
p
r
p
r
v
p
p
1)
Please note tha t blue test plug on ASV-BD ne eds to be open
(default co nfiguration)
Fig. 1 Setting of ASV-PV = p outside the control loop)
1)
p
a
(partner valve
riser
p
p
p
1)
Please note tha t the red test plug on ASV-BD ne eds to be
open and blu e test plug closed
Fig. 2 Setting of ASV-PV = p
p
p
1)
o
v
p
a
+ p
riser
p
ASV-BD can be used outside or inside the control loop by choice of which measuring nipple is open. Change of configuration can be done under pressure - simply by closing/opening test plugs. Configuration inside the control loop (default position) allows flow verification, while configuration outside the control loop allows flow limitation.
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Data sheet Automatic balancing valves ASV
Applications (continuous)
ASV valves are to be used in radiator heating systems to control the differential pressure in risers (Fig. 3) or horizontal loops - mostly used in new installation (Fig. 4). To limit the flow for every radiator, the thermostatic radiator valve with pre­setting function is used together with a constant pressure provided by the ASV, thus providing balanced heat distribution.
Fig. 3 ASV in vertical riser / t ypical radiator heating
application (general example)
Fig. 4 ASV in horizontal loop / t ypical radiator heating application (general example)
ASV valves are also a perfect solution in floor heating systems (Fig. 5). To limit the flow, every manifold with integrated presetting should be used together with a constant pressure provided by an ASV-PV valve.
ASV-BD
ASV-PV
Fig. 5 ASV in manifold for floor heating system
Alternatively the flow for the whole manifold can be limited by using the setting function of the ASV-BD. Due to its small dimensions the ASV automatic balancing valves are easy to install in a wall mounted box for floor heating manifolds.
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Data sheet Automatic balancing valves ASV
Ordering
ASV-PV balancing valve, included in the box:
1,5 m impulse tube (G ⁄ A)
k
Typ e DN
VS
(m3/h) (kPa)
15 1, 6
20 2,5 Rp ¾ 003Z5502 003Z5602
25 4,0 Rp 1 003Z5503 003Z5603
32 6,3 Rp 1¼ 003Z5504 003Z5604
40 10,0 Rp 1½ 003Z5505 003Z5605
50 16, 0 Rp 2 003Z5506 003Z56 06
15 1, 6
20 2,5 G 1 A 003Z5512 00 3Z5612
25 4,0 G 1¼ A 00 3Z5513 0 03Z5 613
32 6,3 G 1½ A 00 3Z5514 -
40 10,0 G 1¾ A 0 03Z5515 -
50 16, 0 G 2¼ A 003Z5516 -
15 1, 6
20 2,5 Rp ¾ 003Z5542
25 4,0 Rp 1 003Z5543
32 6,3 Rp 1¼ 003Z5544
40 10,0 Rp 1½ 003Z5545
50 16, 0 Rp 2 003Z5546
15 1, 6
20 2,5 G 1 A 003Z5552
25 4,0 G 1¼ A 003Z5553
32 6,3 G 1½ A 003Z5554
40 10,0 G 1¾ A 003Z5555
50 16, 0 G 2¼ A 003Z5556
Connection
Rp ½
Internal thread
IS O 7/1
G ¾ A
External thread
ISO 228/1
Rp ½
Internal thread
IS O 7/1
G ¾ A
External thread
ISO 228/1
∆p setting range Code No.
without insulation with EPP insulation
003Z 5501 003Z 5601
5-25
003 Z55 11 0 03 Z56 11
5-25
003Z5 541
20-60
003Z5551
20-60
-
-
ASV-BD shut-off valve, multifunctional partner
valve (shut-off, rotating measuring station) and EPP insulation
k
Typ e DN
VS
(m3/h)
15 3,0
20 6,0 Rp ¾ 003Z4042
25 9,5 Rp 1 003Z4043
32 18 Rp 1¼ 003Z404 4
40 26 Rp 1½ 003Z4045
50 40 Rp 2 003Z4046
Connection Code No.
Rp ½ 003Z4 041
Internal
thread IS O 7/1
ASV-M shut-off valve, without test plugs and with EPS insulation
k
Typ e DN
VS
(m3/h) 15 1, 6
20 2,5 Rp ¾ 0 03L7692
25 4,0 Rp 1 0 03L7693
32 6,3 Rp 1¼ 0 03L7694
40 10 Rp 1½ 0 03L7695
15 1, 6
20 2,5 G 1 A 003L7697
25 4,0 G 1¼ A 0 03L7698
32 6,3 G 1½ A 003L7699
40 10 G 1¾ A 003L7700
50 16 G 2¼ A 003L7702
Connection Code No.
Rp ½ 003L7691
Internal
thread IS O 7/1
G ¾ A 003L7696
External
thread
ISO 228/1
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Data sheet Automatic balancing valves ASV
Ordering (continuous)
Spare parts
Typ e Description Comments Connection/Dimension Code No.
ASV-PV handle
ASV-PV Service kit 20- 60 kPa
ASV-PV Service kit 5-25 kPa
ASV-PV Service kit 20-80 kPa
Differential pressure measuring connector For ASV-PV drain connection 003L8143
ASV-PV drain connection DN 15-50 00 3L8141
ASV-BD handle
Impulse tube, with O-rings
2)
DN 15-25 003Z7855
DN 32-50 003Z7857
DN15 -20 003 Z7831
DN 25 003Z7832 DN 32 003Z7833 DN 40 003Z7834 DN 50 003Z7835
DN15 -20 0 03Z7841
DN 25 003Z7842 DN 32 003Z7843 DN 40 003Z7844 DN 50 003Z7845 DN 32 003Z7836 DN 40 003Z7837 DN 50 003Z7838
1,5 m 003L 8152 2,5 m 003Z0690
5 m 0 03L8153
003Z4652
O-ring for impulse tube Set of 10 pieces 2,90 × 1,7 8 003L8175
Plug for impulse tube connection ASV-BD/M Set of 10 pieces G ⁄ A 0 03L 8174
1)
With handle
2)
For com plete range of ASV-BD accessori es please refer to LENO™ MSV-BD datashe et.
Accessories - Fittings
Typ e Comments to pipe to valve Code No.
R / DN 15 003Z0232
R / DN 20 0 03Z0233
Tailpiece threaded (1 pcs.)
Tailpiece welding (1 pcs.)
R 1 DN 25 003Z0234
R 1 / DN 32 003Z0235
R 1/ DN 4 0 003Z0273
R 2 DN 50 (2 /”)
DN 15
DN 20
DN 25
DN 32
DN 40
DN 50 DN 50 (2 /”)
DN 15 003Z0226
DN 20 003Z0227
DN 25 003Z0228
DN 32 003Z0229
DN 40 003Z0271
00 3Z0274
003Z0272
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Data sheet Automatic balancing valves ASV
Accessories
Typ e Description Comments Connection/Dimension Code No.
ASV-PV flushing accessory 003Z7850
Two test plugs and one locking plate For ASV-M, rectus t ype 00 3L8145
3 mm test plugs, 2 pcs For ASV- BD
ASV-BD drain connection
Plastic impulse tube with connec tors and adapters
Commissioning label
2)
½” hose connection 003Z4096
¾” hose connection 003Z4097
For making set of 10 pieces
Set of 10 pieces DN15 -50 003Z7860
1)
3)
Plug for connecting impulse tube G ⁄-R ¼ connection 00 3L8151
EPP insulation cap for ASV-PV
EPP insulation cap for ASV-BD
max. 120 °C
EPP insulation cap for ASV-M
1)
For com plete range of ASV-BD accessori es please refer to LENO™ MSV-BD datashe et.
2)
To be fitte d on insulation
3)
10m of impulse tube
003Z4662
003Z0689
DN 15-20 003Z7800
DN 25 0 03Z7802
DN 32 003Z7803
DN 40-50 003Z7804
DN 15 003Z4781
DN 20 0 03Z4782
DN 25 0 03Z4783
DN 32 003Z4784
DN 40 003Z4785
DN 50 0 03Z4786
DN 15 00 3L8170
DN 20 0 03L 8171
DN 25 0 03L8172
DN 32 00 3L817 3
DN 40 0 03L8139
Technical data
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Typ e ASV-P V ASV-M ASV-B D
Nominal diameter DN 15- 50 15- 50 15-50
Max. pressure (PN)
Test pressure 25 25 30
bar
Differential pressure over the valve kPa 10-250 10-150
Shut Off leakage No visible leakage
Working temperature
Storage and transport temperature –40 … 70
°C
16 16 20
1)
2)
2)
D
10-2 50
2)
A
0 … 120 –20 … 120 –20 … 120
Material of parts in contact with water
Valve body Brass Brass DZR brass
Cone DZR brass Brass
Membrane / O-rings EPDM EPDM EPDM
Spring Patent wire - -
Ball - - Brass / chromium plated
1)
Pl ease note that the maximum adm issible differential p ressure across the valve 150 kPa should also not be excee ded at partial load.
2)
ISO 5208
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Data sheet Automatic balancing valves ASV
Design
1. Spring guide
2. Shut-off handle
3. Spring
4. Differential pressure setting
spindle
5. Setting scale
6. O-ring
7. Locking ring
8. Impulse tube connection
9. Diaphragm element
10. Control diaphragm
11. Internal connection
12. Valve body
13. Pressure-relieved valve cone
14. Seat
ASV handling video
ASV-PV is a compact differential pressure controller designed to guarantee high quality of automatic balancing. Innovative construction and ease of use are incorporated into the valve with the following features:
• integrated membrane part into valve body ,
• easy setting with locking function ,
• flushing function,
• shutt-off function, separated from presetting
• membrane adapted to valve size.
Via an internal connection and together with the reference spring ③, pressure in the return pipe acts on the lower side of the control diaphragm while via an impulse tube , pressure in the flow pipe acts on the top of the diaphragm. In this way the balancing valve maintains adjusted differential pressure.
Partner valves ASV-BD/M are to be used together with the automatic balancing valves ASV-PV to control differential pressure in the risers.
The valves factory set to 10 kPa or 30 kPa. They can be easily adjusted to another setting using setting scale . Turning the setting ring clockwise increases the setting; turning it counter clockwise reduces the setting.
Fig. 6 ASV-PV
1. Handle with setting scale
2. Spindle head
3. Rotation lock
4. Te st plug
5. Valve top
6. Spindle
7. Impulse tube connection
8. Closing bush
9. Hose connection
10. Rotating measuring station
11. Throttle bush
12. Supporting screw
13. Ball seat
14. Ball
15. Valve body
1. Shut-off handle
2. Shut-off spindle
3. O-rings
4. Valve cone
5. Seat
6. Valve body
ASV-BD is a combined presetting and shut-off valve with a range of unique features:
• high kv values for small pressure losses,
• partner valve position inside or outside the control loop (see page 2 for details), can even be changed after the valve is already installed and under pressure,
• numeric presetting scale, visible from multiple angles ,
• easy locking of presetting,
• rotating measuring station with built-in test plugs for 3 mm needles,
• drain function via drain connection accessory (Code No. 003Z4096 or 003Z4097) ,
• removable handle for easy mounting,
• shut-off function separated from presetting,
• open-closed colour indicator.
ASV-BD can be used outside or inside the control loop (see page 2 for details) dependent on which test plug is open. Configuration is changeable under pressure.
The shut-off function features a ball valve, which only requires a 90 degree turn to shut the valve completely.
ASV-M is designed to shut-off the pipe flow. ASV-M has a connection for an impulse tube to ASV-PV. It can be equipped with test plugs for flow measuring (which are sold separately as accessories).
ASV-BD valve is supplied with two test plugs for 3 mm needles. A twin bracket enables the user to connect both needles simultaneously.
Fig. 7 ASV-BD DN 15-50
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Fig. 8 ASV-M
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Data sheet Automatic balancing valves ASV
Sizing
Q
≤ Q ≤ Q (at 10 kPa)
min
Fig. 9 diagram A and B in Appendix.
Column diagram for sizing Q =required design flow ASV valves at ∆pv = 10 kPa. For different ∆pv values use
We recommend to size the diameter of ASV-PV valves by using Fig 9. Maximum flow rates are based on 10 kPa differential pressure over ASV-PV valve which allows perfect control performance of ASV-PV and saves energy, while minimal nominal flow allow controllability close to zero.
After ASV-PV valves have been sized the same dimension of partner valve ASV-BD / ASV-M valve should be selected.
Example:
Given: Pipe flow 200 l/h, pipes DN 15
Solution: Horizontal line intersects the column for the valve DN 15 which can therefore be selected as required size (in case more columns are intersected the smaller valve size is recommended.)
For detailed sizing see examples on pages 14 and
15. For different ∆pV (differential pressure over the valve) see diagrams in Appendix A.
Connection between valves size and pipe size
Kv values per particular dimension were designed to cover flow 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 m/s dimension of the valve should be equal to pipe dimension.
This rule is derived out of the fact that Kv values per particular dimension were designed to cover flow range according to VDI 2073 at differential pressure of 10 kPa over the ASV-PV valve.
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Data sheet Automatic balancing valves ASV
kPa 5bar 0,05
0,4
9,0
Kv
Q
p
2
2
p
 
 
 
 
1
Sizing-design examples
p
r
v
p
p
p
p
a
Fig . 10
1. Example
Given: Radiator system with thermostatic radiator valves with pre-setting function.
Desired flow for the riser (Q): ...........................900 l/h
Minimal available pressure
for that riser (∆pa) ..................................................60 kPa
Estimated pressure drop over the riser
at the desired flow (∆pr) .....................................10 kPa
Wanted:
• Valve type
• Valve size
Since radiator valves have pre-setting function ASV-M is selected. ASV-PV should control 10 kPa pressure over the riser that means that 50 kPa out of 60 will be disposed over two valves.
∆pv + ∆pp = ∆pa−∆pr = 60−10 = 50 kPa
We presume that dimension DN 25 is the right dimension for this example (please mind that both valves should be of the same dimension). As ASV-M DN 25 is to be fully open pressure drop is calculated by following equation:
∆pa ≥ ∆pp + ∆pr + ∆pv
Δpv Pressure drop across ASV-PV Δpp Pressure drop across ASV-M valve Δpr Necessary pressure for the riser Δpa Available pressure for the riser
2. Example
Correcting the flow with the differential pressure setting.
Given:
Measured flow for the riser Q1 ........................ 900 l/h
ASV-PV valve’s setting ∆pr ................................ 10 kPa
Wanted:
New valves’ setting to increase the flow for 10 %, Q2 = 990 l/h.
Setting on the ASV-PV valve:
When needed setting of the control pressure can be adjusted to particular value or 20-60 kPa. With increasing/decreasing the setting it is possible to adjust flow trough the riser, terminal or similar. (100 % increase of control pressure will increase the flow for approx. 41 %)
2
Q
2
pp
12
Q
10,0
 
990 900
2
kPa 21
 
If we increase the setting to 12 kPa flow will be increased to 10 % to 990 l/h.
or by reading from diagram in
Appendix A, fig. C as follows: Draw horizontal line from 0,9 m3/h (~900 l/h) trough the line that depicts dimension DN 25. From the intersection draw vertical line to read that pressure drop is 5 kPa. Pressure drop over ASV-PV valve is therefore:
∆pv= (∆pa-∆pr)−∆pp = 50 kPa−5 kPa = 45 kPa
as can be read from diagram in Appendix A, Fig. A.
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Data sheet Automatic balancing valves ASV
hm1,5
03,0
880,0
p
Q
k
3
v
v
Sizing-design examples
(continuous)
p
r
p
p
p
o
v
p
p
a
Fig . 11
3. Example
Limiting the flow with ASV-BD valve
Given:
Desired flow for the branch (Q): .....................880 l/h
ASV-PV and ASV-BD (DN 25)
Setting on the ASV-PV valve (∆po) ..................10 kPa
Estimated pressure drop over
the riser at desired flow (∆pr) ............................. 7 kPa
∆pa ≥ ∆pp + ∆pr + ∆p
Δpv Pressure drop across ASV-PV valve Δpp Pressure drop across ASV-BD valve Δpo Pressure drop in the riser including ASV-BD Δpa Available pressure for the riser Δpr Pressure drop in the riser excluding ASV-BD
v
4. Example
Floor heating application with ASV-PV on return manifold
Given:
Pressure drop (largest loop): ............................. 16 kPa
Pressure drop manifold: ........................................2 kPa
Flow demand of manifold: ............................... 900 l/h
Connection pipe: .....................................................DN25
Required:
Setting of the ASV-BD valve to achieve desired flow
Solution: When needed setting of the ASV-BD can be adjusted to perform flow limitation function. ASV-BD namely is inside the control loop of the pressure controller therefore adjusting ASV-BD would result in adjusting flow limitation. Red test plug on ASV-BD valve needs to be open (blue one in closed position). (General rule is that 100 % increase of kv value will increase the flow for 100 %).
The result can be read as well from diagram in Appendix A, Fig.B.
At desired flow pressure drop over the entire branch is 7 kPa. Without using ASV-BD flow trough the branch at fully open control valve will be 19 % higher thus causing overflow (7 kPa allow 880 l/h, while 10 kPa allow 1.050 l/h). With adjusting the ASV-BD DN 25 pre-setting to 4,3 kv value (5,1 m3/h) we will limit the flow to 880 l/h as desired.
Wanted:
• Valve size (DN)
• Valve setting (∆po)
ASV-PV DN25 / 5-25 kPa is selected (same size as connection pipe).
Since the valve setting is given by sum. of total pressure loss:
manifoldloopo
kPa 18 = Pa2k + kPa 16 =Δp + Δp =Δp
Setting 18 kPa on ASV-PV setting scale is needed.
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This value is obtained by following calculation: ∆pp = ∆po − ∆pr = 10 − 7 = 3 kPa.
Alternative, flow limitation can also be done by bigger ∆p setting on ASV-PV valve.
VD.A9.J2.02
Data sheet Automatic balancing valves ASV
Installation
ASV-PV should be installed in the return pipe with flow in the direction of the arrow on the valve body. Partner valves (ASV-M/BD) should be installed in the flow pipe, with flow in the direction of the arrow on the valve body. The impulse tube should be installed between partner valve and ASV-PV.
The impulse tube should be flushed through from flow pipe direction before connection to ASV-PV.
Small installation dimensions enable easy installation of ASV valves even in very limited space. A 90° angle between all service features (shut-off, draining, setting, measuring) allows an easy access under any installing condition.
Setting Δp setting
The setting of differential pressure can be easily changed using the setting scale, which saves time for the installer during maintenance of the system.
Draining The drain connection on ASV-PV or ASV-BD can be used for water tapping and filling. Use the following procedure to drain via ASV-BD valve:
1. Close opened test plug.
2. Remove the impulse tube.
3. Dismount the hose connection.
4. Fit drain connection accessory (Code No. 003Z4096 or 003Z4097).
5. Blue test plug opens the outlet while red test plug opens the inlet. Make sure not to use more than max. 3 turns. Drain connection and test plugs can rotate to any position.
Use the following procedure to set the desired differential presure:
1. Unblock the setting .
2. Make the setting by rotating of scale to desire value ②.
3. Block the setting back to final position .
Factory presetting
Δp setting range (kPa) kPa
5 - 25 10
20 - 60 30
Pressure testing
Click
Max. test pressure ............................................... 25 bar
When pressure testing the system the impulse tube should be connected and all partner valves should be open.
Click
p
+
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Data sheet Automatic balancing valves ASV
Flushing
Measurement of flow and differential pressure
ASV-PV valves provides ability to flush the system from flow pipe. Use the following procedure for flushing the system:
1. Ensure system is filled with water
2. Dismount shut off handle and fit flushing accessory ② (Code No. 003Z7850) on the ASV-PV valve spring guide.
3. Rotate by hand flushing accessory clockwise
003Z7850
Click
DN32-50 DN15 -25
to end position before flushing the system .
4. Flushing of the system should be done with flow in direction of the arrow on the valve body.
5. After flushing the system rotate counter clockwise to starting position.
Note:
Make sure system is f illed with water before mo unting flushing
accessory to ensu re differential pressure d oes not exceed 5 bar.
Differential pressure across the ASV-BD valve can be taken by:
• Measuring: by using Danfoss PFM or any other measuring device. ASV-BD is equipped with two test plugs so that the differential pressure across the valve can be measured.
• Using the pressure drop graph for ASV-BD (Appendix A, fig B), where the actual differential pressure across a valve can be converted to actual flow.
Note: When measurin g sized flow, all radiator thermos tat sensors should be fully o pen (nominal flow).
Measurement of differential pressure (Δpr) across riser.
Fit a measuring connector (Code No. 003L8143) on the ASV-PV balancing valve drain connection (DN 15-50). Measurements should be taken between :
• the test plug at ASV-BD valve (blue test plug needs to be open-factory position) and the measuring connector on the ASV-PV.
• the test plug at ASV-M valve (port B) and the measuring connector on the ASV-PV.
Flow verification (in case ASV-BD is used outside the controlled loop)
Use the following procedure:
1. Blue test plug on ASV-BD needs to be open (factory position).
2. ASV-BD setting is at maximum value.
3. Flow can be measured using Danfoss PFM or other brand of measuring instrument.
4. If pressure drop across the valve is too low for reliable flow measurement, ASV-BD needs to be set to lower setting to achieve high enough pressure drop across the valve.
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Data sheet Automatic balancing valves ASV
Pump optimization ∆p measurement can also be used to optimize
the pump head – it is important to measure on the last (index) riser of the system and at full system load (all TRV’s fully open).
The pump head can be decreased until no more than the minimal required pressure is available on the last riser.
Troubleshooting
Check the following if the riser valve does not function correctly:
1. Is the flow direction through the valve correct?
2. Is the impulse tube fitted correctly and are any test plugs open?
3. Is the valve shut-off open?
Installation heights To ease installation of ASV-PV where space is
limited, installation heights can be reduced.
Valve is turned to max setting and blue knob can be removed.
For advanced users: see installation guide for ASV-PV upgrade kit for further information on installation heights.
With observation of the ∆p while reducing the pump speed, the goal is to optimize the pump at the lowest possible setting while making sure that enough pressure and flow is available.
H min.
DN H min.
15 80
20 80
25 100
32 150
40 150
50 15 0
Insulation
Fittings
ASV-PV (versions with insulation) and ASV-BD valve are supplied together with EPP insulation cap. Insulation cap offers click on feature for fast and easy mounting on the valve. Insulation cap in EPP is offered for use at higher temperatures, up to 120 °C.
ASV-M valve is supplied with EPS insulation packaging, which can be used as insulation in systems where the temperature does not exceed 80 °C under continuous operation.
For ordering see Accessories and spare parts table.
Both materials (EPS and EPP) are approved in accordance with fire class standard B2, DIN 4102.
For valves with external thread Danfoss offers threaded or welded tailpieces as accessory.
Materials:
Nut ................................................................................brass
Tailpiece welding .....................................................steel
Tailpiece threaded ..................................................brass
For ordering see Accessories and spare parts table.
ASV-M
ASV-BD / ASV-PV
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© Danfoss | 2016.11 | 13
Data sheet Automatic balancing valves ASV
Dimensions
H
b b
S
c
a
L
1
Internal thread (ISO 7/1)
L
2
L
3
L
4
External thread (ISO 228/1)
ASV-PV
L1L2L3L4H 1)H
DN
mm I SO 7/1 ISO 228/1
15 65 85 14 0 159 111 96 116 27 Rp ½ G ¾ A
20 75 100 161 184 111 96 116 32 Rp ¾ G 1 A
25 85 110 180 194 13 6 113 14 3 41 Rp 1 G 1¼ A
32 95 121 206 184 191 18 3 213 50 Rp 1¼ G 1½ A
40 10 0 136 242 220 200 192 222 55 Rp 1½ G 1¾ A
50 130 166 280 250 203 195 225 67 Rp 2 G 2¼ A
1)
at 10 kPa or 30 kPa factory se tting
2)
at 25 kPa or 60 kPa settin g
3)
at 5 kPa or 20 kPa settin g
min
2)H
3)S a b c
max
ASV-BD
L H S a
mm ISO 228/1
65 92 27 G ½
15
75 95 32 G ¾
85 98 41 G 1
95 121 50 G 1¼
32
100 125 55 G 1½
130 12 9 67 G 2
G⁄
DN
H
20
25
S
a
a
L
40
50
G ¾ A
14 | © Danfoss | 2016.11
ASV-M
DN
15
20
25
32
40
50
D
1
1
a
H
2
H
L
a
S
S
L
1
L
1
L
H
2
3
H
1
2
b
D
1
b
L
1
L
2
L
3
S a b
mm IS O 7/1 ISO 228/1
65 120 139 48 15 28 27 Rp ½ G ¾ A
75 136 159 60 18 35 32 Rp ¾ G 1 A
85 155 169 75 23 45 41 Rp 1 G 1¼ A
95 172 179 95 29 55 50 Rp 1¼ G 1½ A
100 206 18 4 100 31 55 55 Rp 1½ G 1¾ A
130 246 214 106 38 55 67 - G 2¼ A
VD.A9.J2.02
Data sheet Automatic balancing valves ASV
Dimensions - insulation
A
C
A
C
ASV-P V
A B C H
H
B
H
B
DN
15
95 120 110 36
20
25 110 130 130 42
32 135 145 14 0 50
40
155 165 17 0 59
50
ASV-B D
A B C H
DN
15 79 85 12 2 31
20 84 85 12 2 33
25 99 85 122 45
32 132 85 18 5 55
40 138 130 185 57
50 138 126 18 5 53
mm
mm
ASV-M
A B C
H
A
B
C
DN
15 61 110 111 30
20 76 12 0 136 38
25 100 135 155 50
32 118 148 160 60
40 118 148 180 60
mm
H
VD.A9.J2.02
© Danfoss | 2016.11 | 15
Data sheet Automatic balancing valves ASV
Appendix A-Sizing diagram
Ex. 1
Fig. A - Sizing diagram ASV-PV DN 15-50
16 | © Danfoss | 2016.11
VD.A9.J2.02
Data sheet Automatic balancing valves ASV
Appendix A-Sizing diagram (continuous)
Ex. 3
Fig.B - Sizing diagram ASV-BD DN 15-50
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© Danfoss | 2016.11 | 17
Data sheet Automatic balancing valves ASV
Appendix A-Sizing diagram (continuous)
Fig.C - Pressure drop over ASV-M valves, DN 15-50
18 | © Danfoss | 2016.11
VD.A9.J2.02
Data sheet Automatic balancing valves ASV
ASV-PV tender text
Tender Text ASV-PV DN 15-50 (4th gen.)
Branch should be balanced with a differential pressure controller for dynamic hydronic balance, with following characteristics:
- Valve should keep stable differential pressure across the branch by membrane driven controller
- Valve should have variable Differential pressure setting.
- Minimum needed differential pressure over the valve should not be higher than 10 kPa, independently from Dp setting
- Valve should have metal to metal (valve cone and seat) sealing to ensure optimal performance of differential pressure control at low flows
- Differential pressure setting should be linear via visual scale and without tool, locking function should be integrated to prevent unauthorized change of setting
- The setting range should be adaptable via spring replacement. Spring should be exchangeable under pressure
- Setting range on spring should not be more than 40 kPa to achieve best accuracy
- Valve should provide differential pressure setting range fit to application to ensure optimal system performance (such as 5-25 kPa setting range for radiator based systems)
- Valve capacity per valve size should cover flow range according to VDI 2073 Standards (with water velocity of up 0.8 m/s)
- Valve should have shut-off function separated from the setting mechanism. Shut-off service function should be possible to do by hand / without tool
- Drain function should be integrated in valve
- Valves should have integrated flushing service function. Flushing can be done with flushing accessory
- Valve should be delivered with impulse tube. Inner diameter of impulse tube should not be bigger than 1.2 mm to ensure optimal performance within the system
- Valve should be delivered with thermal insulation caps, up to 120°C
- Valve should be delivered in reliable packaging for safe transport and handling
Product characteristics:
a. Pressure class: PN 16 b. Temperature range: 0 … +120 °C c. Connection size: DN 15-50 d. Connection type: Internal thread ISO 7/1 (DN 15-50), External thread ISO 228/1 (DN 15-50) e. ∆p setting range: 5-25 kPa, 20-60 kPa and 20-80 kPa f. Max differential pressure across valve: 2.5 bar g. Installation: differential pressure controller should mounted on return pipe with connection via impulse tube to supply pipe.
VD.A9.J2.02
© Danfoss | 2016.11 | 19
Danf already on order pro All trademarks in this material are property of the respec
Data sheet Automatic balancing valves ASV
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.
20 | © Danfoss | DHS-SRMT/SI | 2016.11
tive companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
VD.A9.J2.02
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