Danfoss AB-PM DN 40 User manual

© Danfoss | 2018.01 VD.HR.D1.02 | 1
Pressure difference controller with integrated flow limiter
AB-PM DN 40-100
Data sheet
AB-PM is a combined balancing valve.
It features 4 functions in one compact valve:
1. Differential pressure control
2. Flow limitation
3. Control valve with linear characteristic
4. Zone control
Reliable HVAC system with low total cost of
ownership:
Design:
• Easy, fast and flexible HVAC system design
Construction:
• Fast installation and easy setting
• Lower commissioning cost - no need for
balancing
• Faster project with staged handover
Operation:
• Perfect balance at all loads
• Guaranteed flow and p for users
• No problems caused by poor designed/
executed user installations
• Unoccupied zones do not impact other
users
• Flow verification and easy troubleshooting
Description
Ordering AB-PM valve (including 2.5 m impulse tube (G ⁄ A), brass handle (003Z0695) impulse tube
connector (003L8151))
Picture DN Connection Code No.
40 Ext thread (ISO228/1) G 2A 003Z1435
50 Ext.thread (ISO228/1) G 2½A 003Z1436
65
Flange PN 16
003Z1438
80 003Z1439
100 003Z1440
Actuator
Type Power supply Code No.
AME435 QM 1) 24 VAC/DC 082H0171
1) For more information see AME 435 QM datasheet
Accessories
Picture Type To pipe To valve Code No.
Union connection
(CW617N) (1 pcs.)
R1½ DN40 003Z0279
R2 DN50 003Z0278
Tail piece welding
(W.Nr. 10308)(1 pcs.) Weld DN40 003Z0270
DN50 003Z0276
Tailpiece welding INOX
(W. Nr. 1.4404) (1 pcs.) Weld DN40 003Z1275
DN50 003Z1276
AB-PM is ideal for staged installation and commissioning

Data sheet AB-PM DN 40-100
2 | VD.HR.D1.02 © Danfoss | 2018.01
Spare parts
Type Comments Code No.
Handle AB-PM (brass handle for spindle fixation) DN 40-100 003Z0695
Impulse tube, with O-rings
1.5 m 003L8152
2.5 m 003Z0690
5 m 003L8153
Plastic impulse tube with connectors and adapters (industry pack) 10 pcs order quantity 003Z0689
Adapter large G .-R .; G 1/16 003Z0691
Plug for connecting impulse tube
3/8” – 1/16” 003L5042
¾” – 1/16” 003Z0109
¼” – 1/16 003L8151
Plug for connecting impulse tube on other valves (US standard) G 1⁄16-4⁄16-20 UNF-2B 003L8176
O-ring for impulse tube (set of 10 pcs) 2.90 × 1.78 003L8175
Plug for impulse tube connection ASV-I/M (set of 10 pcs) G1⁄16 A 003L8174
Needle plug set (1 pcs.) 003Z0100
Ext plug set (1 pcs.) 003Z0106
Measuring needle, set (1 pcs.) 003Z0107
Elbow test plug extension (1 pcs.) 003Z3944
Straight test plug extension (1 pcs.) 003Z3945
Straight plug extension set 003Z3946
Ordering
Technical data Nominal diameter DN 40 50 65 80 100
Qnom factory setting (∆pr 25 kPa) l/h 5000 6500 16800 19600 21000
Min. differential pressure (∆pa), Factory setting 1) kPa 42 60
Setting range 2) 3) Flow% 40-100
∆p setting 0-20 turns 0-40 turns
Nominal maximal pressure bar 16 (PN16)
Max. pressure drop 4
Control valve characteristics Linear
Shut-off leakage rate Acc. to ISO 5208 class A - no visible leakage
CV stroke mm 10 10 15 15 15
Connection External thread (ISO
228/1) G2A Flange (EN 1092-2)
Connection actuator Danfoss standard
Flow medium
Water and water mixture for closed heating and cooling systems
according to plant type I for DIN EN 14868. When used in plant
Type II for DIN EN 14868 appropriate protective measures are
taken. The requirements of VDI 2035, part 1 + 2 are observed.
Medium temperature °C –10 … 120
Materials in water
Body Cast iron EN-GJL 250 (GG 25)
Membrane and O-rings EPDM
Springs W.Nr. 1.4568, W.Nr. 1.4310
Cone (Pc) CuZn40Pb3 -CW 614N,
W.Nr. 1.4305
Seat (Pc) /(Cv) W.Nr. 1.4305
Cone (Cv) CuZn40Pb3 -CW 614N
Screw Stainless steel (A2)
Flat gasket NBR
Sealing agent (for test plugs) Dimenthcrylate Ester
1) For other settings see table 6
2) Factory setting see fig. 13 and 14
3) Regardless of the setting, the valve can modulate below 1 % of set flow.

Data sheet AB-PM DN 40-100
VD.HR.D1.02 | 3
© Danfoss | 2018.01
Alternative
PIBCV
+
003Z0691
003L8151
Fig. 1 AB-PM can be connected to flow or return with
impulse tube
Impulse tube connected to flow
Impulse tube connection
DPCV
003L8151
Impulse tube connected to return
PIBCV
003L8151
Mounting AB-PM DN 40-100 should be mounted in the
return pipe. The arrow on the valve body should
correspond with the flow direction of the
medium. The impulse tube should be connected
to the supply pipe using the included ¼”-/”
adaptor (003L8151).
Alternatively, the impulse tube can be connected
to a partner valve, such as ASV-BD or MSV-F2 1).
Using a partner valve offers additional service/
troubleshooting functions such as flow
verification, shut-off etc.
If the impulse tube is connected to the supply
pipe the AB-PM functions as a differential
pressure controller with flow limitation. The
impulse tube can also be connected to the
return pipe (upstream from the AB-PM) or to
the red test plug with adapter 003Z0691. In
that case the AB-PM will function as a pressure
independent control valve with 100% authority.
1) For information on partner valve see ASV and MSV-F2 datasheet
Service and trouble
shooting
The valve can be manually shut off for service
purposes, up to 16 Bar.
AB-PM is equipped with 3 test plugs for flow
verification, service and trouble shooting.
When filling the system make sure to open the
supply valve before opening the return valve.
The pressure on the upper side of the membrane
(impulse tube) should always be higher than the
pressure on the lower side of the membrane (at
the valve)
Flush the impulse tube and ensure the HVAC
system is de-aired before starting the system.
For the setting procedure please refer to the
operating instructions enclosed with the
product.
It is recommended that an FV filter be installed in
the system supply pipe.
Commissioning
Please check the following if the 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? (see operating
instructions)
4. Is the available pressure big enough?

Data sheet AB-PM DN 40-100
4 | VD.HR.D1.02 © Danfoss | 2018.01
Fig. 2 Staged commissioning – 1st stage : ensuring Δp and flow for each zone
Fig. 3 Staged commissioning – 2nd stage : Installation of terminal units
DPCV: several fancoils with
individual room control
PIBCV: zone control for
one terminal unit
DPCV: Zone control
for several fancoils
Heating/
cooling
station
Zone 1
Zone 2
Zone 3
Application
-variable flow systems
AB-PM DN 40 to 100 is the ideal solution for
applications where a so called staged installation,
hand over and commissioning is used. In such
cases, the 1st stage is installation of backbone
piping without terminal units. AB-PM is used as
DPCV with flow limitation, ensuring the specified
design pressure and flow to each zone. The 2nd
stage is then the installation of terminal units.
Typical applications are shopping malls and shell
& core office buildings.
The AB-PM ensures the required flow for each
zone and maintains hydronic balance in the
system.
In the 2nd stage of commissioning the installation
of terminal units can be done. Optionally the
AB-PM can be changed from differential pressure
controller to pressure independent control valve.
This allows flexibility when designing the zones.
If only one terminal unit is used in the zone, the
AB-PM as a PIBCV can be used to control that
unit and no additional valves are needed.
Zone 4
Zone 5
Zone 6

Data sheet AB-PM DN 40-100
VD.HR.D1.02 | 5
© Danfoss | 2018.01
∆pv
∆pr=P0-P1
∆pa=P0-P3
003L8151
Flow verification /trouble
shooting
To verify that an installation functions per the
design specifications the AB-PM (DN 40-100) has
test plugs that allow measuring of the pressure
difference ∆pror ∆pcv across the valve. In this
way the pressure difference and flow can be
verified for handover or troubleshooting.
At handover of the base building when the HVAC
design conditions are specified but components
are not yet installed in the zone, the differential
pressure and flow for the valve and loop can
only be verified by installing a bypass with the
same dp as specified for the zone. For quick hand
over, without flow verification, the calculated dp
can be pre-set on the valve for the dp and flow
demand of the loop.
In the 2nd stage of commissioning when the
HVAC system has been installed in the zone, the
differential pressure and flow can be verified for
handover and troubleshooting.
The differential pressure can be measured using
the following methods:
DPCV: Measure differential pressure from AB-PM
to installed partner valve (∆pr=p0− p1).
PIBCV: Measure the differential pressure across
the control valve (∆Pcv =p1− p2).
To calculate the flow below formulas are used:
DPCV:
∆pr=p0− p1
Q=kvcv × √pr
PIBCV:
∆pCv=P1− P2
Q=kvcv × √pcv
For kvcv values see datasheet “AB-QM flow
checker DN 40-250”
For trouble shooting the available pressure can
be verified, Closing the AB-PM valve fully and
measuring p0– p2.
Verifying the pressure and flow can be done
by using Danfoss PFM or other dp measuring
devices (select valve type: AB-QM)
Q = needed design flow for the loop
Δpr= needed differential pressure for the loop
Δpv= differential pressure on AB-PM
Δpa= min. needed differential pressure over
both AB-PM and loop
Δpa= Δpv+ Δpr
ΔpV= p1− p3
Δpr= p0− p1(as DPCV)
Δpcv = p1− p2(as PIBCV for flow validation)
∆pa= p0− p3
P1-P3
P1-P2
P0-P1
P0
P2
P3
P1
Flow
direction
Differential pressure legend
Sizing AB-PM is to be sized based on the needed flow
(Q) and the needed differential pressure drop for
the zone (pr).
Max flow /∆prfor all sizes are presented in the
sizing guide in fig. 5.
When pipe dimension has been selected, specific
sizing, selection and setting can be identified
based on Q and ∆prin fig. 6-10.
Alternatively table 1-5 can be used for AB-PM
sizing as well.
For needed flow and differential pressure
outside specified in graphs and tables, setting
can be calculated by linear distribution of
setting.
For minimum needed available differential
pressure (∆pa) at Q nominal see table 6.
Fig. 4 Differential pressure legend

Data sheet AB-PM DN 40-100
6 | VD.HR.D1.02 © Danfoss | 2018.01
Fig. 6
Fig. 5
DN 40 Flow limitation on Δp factory setting Factory
setting ∆p setting [kPa]
Δpr
[kPa] 40% 50% 60% 70% 80% 90% 100% /0 turns 5 turns 10 turns 15 turns 20 turns
Q [l/h]
10 4600 5520 6348 7084 7728 8280 9200
15 4000 4800 5520 6160 6720 7200 8000
20 3300 3960 4554 5082 5544 5940 6600 9200
25 2500 3000 3450 3850 4200 4500 5000 8000 10200
30 2070 2310 2520 2700 3000 6600 9200 1110 0
35 5000 8000 10200 119 00
40 3000 6600 9200 11100
45 5000 8000 10200
50 3150 6600 9200
55 5000 8000
60 3150 6600
Table 1
Example 1
Given : Design flow to zone
4200 l/h, pressure drop over
the zone at design flow 25 kPa.
Solution: AB-PM DN 40 is
selected. ∆p setting is kept
at factory setting and flow
limitation is changed to 80 %.
AB-PM will control differential
pressure of 25 kPa when
design flow is achieved and
the flow to the zone will be
limited to 4200 l/h
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
12000
13000
10 15 20 25 30 35 40 45 50 55
60
Q [l/h]
∆p r [kPa]
Example 1
40 %
50 %
60 %
70 %
80 %
90 %
100 % 5 turns 10 turns 15 turns 20 turns
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
50000
55000
10 15 20 25 30 35 40 45 50 55
60
FLOW [L/H]
ΔPr[kPa]
DN 100
DN 80
DN 65
DN 50
DN 40
AB-PMHP DN 10-32
1)
1) See datasheet AB-PM
DN 10-32
DN 40
Sizing
Sizing graph - ΔP/ max. flow

Data sheet AB-PM DN 40-100
VD.HR.D1.02 | 7
© Danfoss | 2018.01
3000
4000
5000
6000
7000
8000
9000
10000
11000
12000
13000
14000
15000
16000
10 15 20 25 30 35 40 45 50 55
60
Q [l/h]
∆p
r
[kPa]
40 %
50 %
60 %
70 %
80 %
90 %
100 %
5 turns 10 turns 15 turns 20 turns
Fig. 7
DN 50 Flow limitation on Δp factory setting Factory
setting ∆p setting [kPa]
Δpr
[kPa] 40% 50% 60% 70% 80% 90% 100% /0 turns 5 turns 10 turns 15 turns 20 turns
Q [l/h]
10 5520 6750 7920 9030 10080 11070 12000
15 4784 5850 6864 7826 8736 9594 10400
20 3910 4781 5610 6396 7140 7841 8500 12000
25 3656 4290 4891 5460 5996 6500 10400 13095
30 3085 3444 3782 4100 8500 11640 14155
35 6500 10088 12825 15390
40 4100 8245 1140 0 14155
45 6305 9880 12825
50 3977 8075 11400
55 6175 9880
60 3895 8075
Table 2
Fig.8
DN 65 Flow limitation on Δp factory setting Factory
setting ∆p setting [kPa]
Δpr
[kPa] 40% 50% 60% 70% 80% 90% 100% /0 turns 10 turns 20 turns 30 turns 40 turns
Q [l/h]
10 8432 11160 14136 17360 19840 22320 24800
15 7616 10080 12768 15680 17920 20160 22400
20 6732 8910 11286 13860 15840 17820 19800 24800
25 7560 9576 11760 13440 15120 16800 22400 25840
30 6075 7695 9450 10800 12150 13500 19800 23560 27740
35 6650 7600 8550 9500 16800 21280 25840 29450
40 13500 18810 23560 27740
45 9500 15960 21280 25840
50 12825 18810 23560
55 9025 15960 21280
60 12825 18810
Table 3
6000
8000
10000
12000
14000
16000
18000
20000
22000
24000
26000
28000
30000
10 15 20 25 30 35 40 45 50 55
60
Q [l/h]
∆p
r
[kPa]
40 %
50 %
60 %
70 %
80 %
90 %
100 % 20 turns 30 turns 40 turns10 turns
Sizing DN 50
DN 65

Data sheet AB-PM DN 40-100
8 | VD.HR.D1.02 © Danfoss | 2018.01
11000
13000
15000
17000
19000
21000
23000
25000
27000
29000
31000
33000
35000
37000
39000
41000
43000
45000
47000
49000
51000
10 15 20 25 30 35 40 45 50 55
60
Q [l/h]
∆pr[kPa]
40 %
50 %
60 %
70 %
80 %
90 %
100 %
10 turns 20 turns 30 turns 40 turns
Fig. 10
DN 100 Flow limitation on Δp factory setting Factory
setting ∆p setting [kPa]
Δpr
[kPa] 40% 50% 60% 70% 80% 90% 100% /0 turns 10 turns 20 turns 30 turns 40 turns
Q [l/h]
10 16470 20130 23607 26901 30012 32940 36600
15 14490 17710 20769 23667 26404 28980 32200
20 12150 14850 17415 19845 22140 24300 27000 36600
25 13545 15435 17220 18900 21000 32200 40600
30 11480 12600 14000 27000 36600 44400
35 21000 32200 40600 48000
40 14000 27000 36600 44400
45 21000 32200 40600
50 14000 27000 36600
55 21000 32200
60 14000 27000
Table 5
Sizing
Fig. 9
DN 80 Flow limitation on Δp factory setting Factory
setting ∆p setting [kPa]
Δpr
[kPa] 40% 50% 60% 70% 80% 90% 100% /0 turns 10 turns 20 turns 30 turns 40 turns
Q [l/h]
10 15120 18113 20790 23373 25956 28350 31500
15 13536 16215 18612 20924 23237 25380 28200
20 11616 13915 15972 17956 19941 21780 24200 31500
25 9408 11270 12936 14543 16150 17640 19600 28200 35000
30 9504 10685 11866 12960 14400 24200 31500 37600
35 19600 28200 35000 40000
40 14400 24200 31500 37600
45 19600 28200 35000
50 14400 24200 31500
55 19600 28200
60 14400 24200
Table 4
9000
11000
13000
15000
17000
19000
21000
23000
25000
27000
29000
31000
33000
35000
37000
39000
41000
10 15 20 25 30 35 40 45 50 55
60
Q [l/h]
∆p r [kPa]
40 %
50 %
60 %
70 %
80 %
90 %
100 %
20 turns 30 turns 40 turns10 turns
DN 100
DN 80

Data sheet AB-PM DN 40-100
VD.HR.D1.02 | 9
© Danfoss | 2018.01
Fig. 11 Setting of differential pressure is done with
standard tool
Fig. 12 Setting of flow limitation with standard tool
Fig. 13 AB-PM DN 40-50
Max. 25 Nm
Do not turn the spindle more than 20 turns as it will become disengaged.
Nominal diameter ≤Factory setting ∆p setting 1)
≤100% /0 turns 5 turns
(pr>= 20 kPa )
10 turns
(pr>= 25 kPa )
15 turns
(pr>= 30 kPa )
20 turns
(pr>= 35 kPa )
pa[kPa]
DN40 42 52 63 74 85
DN50 42 52 63 74 85
DN65 60 72 83 94 105
DN80 60 72 83 94 105
DN100 60 72 83 94 105
Table 6
1) If application requires less dpr, for valve will be higher so flow validation across valve is needed in order to increase.
Min. differential pressure
(Δpa)
Setting The AB-PM valves are factory preset to min. ∆p
setting with 100% flow.
For changing the setting please use the
following procedure:
Setting the desired differential pressure:
the setting on the AB-PM can be changed by
turning the setting spindle to allow higher
differential pressure. 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 AB-PM is at
maximum value within setting range. Now turn
the spindle backwards a number of times (n)
as described in Fig. 13 or 14 until the required
differential pressure setting is obtained.
Adjusting the flow limitation:
To give lower flow than factory setting the
% scale on the AB-PM need to be adjusted
according to sizing diagrams (figure 6 to 10).
Design
1. Shut off knob
2. Differential pressure setting
spindle
3. Membrane
4. DP cone
5. Seat
6. Valve body
7. Control valve cone
8. Locking screw
9. Scale
10. Stuffing box
11. Spindle
12. Impulse tube
13. Brass handle
DN 40 50
5 5
nΔp setting
(turns)
0 turns Min. setting
(factory setting)
… …
20 turns Max. setting
Factory presetting DN 40-50
∆p setting min. setting (0 turns)
Flow % 100%
DN Wrench
40-50 50
65-100 42
one turn
is 10%
The calculated flow can be adjusted easily with
a standard tool. The presetting scale indicates
values from 100 % flow to 40 %. Clock wise
turning would decrease the flow value while
counter clock wise would increase it.
Danfoss recommends a presetting/flow from 40 % to 100 %.
Factory presetting is 100 %.

Data sheet AB-PM DN 40-100
10 | VD.HR.D1.02 © Danfoss | 2018.01
Fig. 14 AB-PM DN 65-100
DPCV PIBCV
Design
1. Shut off knob
2. Differential pressure setting
spindle
3. Membrane
4. DP cone
5. Seat
6. Valve body
7. Control valve cone
8. Locking screw
9. Scale
10. Stuffing box
11. Spindle
12. Impulse tube
13. Brass handle
nΔp setting
(turns)
0Min. setting (factory
setting)
… …
40 Max. setting
Factory presetting DN 65-100
∆p setting min. setting (0 turns)
Flow % 100%
AB-PM is a combined automatic balancing valve.
It works as differential pressure controller (DPCV)
or pressure independent control valve (PIBCV),
flow limiter and zone controller/control valve.
As DPCV it keeps a constant differential pressure
over the control loop and when installed as a
PIBCV it keeps the pressure constant over the
control valve ensuring it full authority.
Higher pressure acts on the lower side of the
control membrane (3) via an impulse tube (12)
while the lower pressure in the return pipe acts
on the upper side of the membrane (use either
membrane or diaphragm. Do not mix these
two, it will help clarity). When available pressure
increases at partial loads, the membrane closes
and thus keeps the differential pressure stable.
The control part of AB-PM is working as a
flow limiter. This enables to set a required
combination of the design flow as well as the
needed ∆p. By presetting the AB-PM, the flow
rate is defined based on the pressure demand of
the loop or terminal unit.
With an actuator mounted on the valve, AB-PM
can be used as a zone valve. When the AB-PM is
converted to a PICV it can be used, together with
an actuator, as a full authority control valve with
either a linear or a logarithmic characteristic.
DN 65 80 100 DN 65 80 100
42 13 23
Do not turn the spindle more than 40 turns as it will become disengaged.

Data sheet AB-PM DN 40-100
VD.HR.D1.02 | 11
© Danfoss | 2018.01
H2
L1
a
H1
AB-PM DN 65-100
H3
AB-PM + AME 435 QM
Dimensions
Type L1H1H2H3a
(EN 1092-2)
Weight
(kg)
mm
DN 65 290 218 388 330 185 41
DN 80 310 223 393 335 200 46
DN 100 350 239 451 350 220 64
H1
L1
b
H2
AB-PM DN 40, 50
H3
AB-PM + AME 435 QM
Type L1H1H2H3bWeight
(kg)
mm
DN40 110 168 273 280 G 2 (ISO228/1) 6.9
DN50 130 G 2 ½ (ISO228/1) 7.8

© Danfoss | DHS-SRMT/SI | 2018.01
12 | VD.HR.D1.02
Danf
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
already on order pro
vided that such alterations can be made without subsequential changes being necessary eady agreed.
All trademarks in this material are property of the respec
tive companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
Data sheet AB-PM DN 40-100
AB-PM DN 40-100 is a combined differential pressure controller for dynamic hydronic balance.
• The valve should be able to ensure hydronic balance for each zone with one or more terminal units.
• Valve shall have flexible functionality as either DPCV or PIBCV.
• The valve can be connected to either flow or return pipe via impulse tube
• With impulse tube connected to flow, the valve should keep differential pressure across the
branch by membrane driven controller.
• With impulse tube connected to the return, the valve should control the flow on every terminal unit
• Valve should have shut-off function.
• Valve should have possibility to mount actuator without effecting presetting.
• Valve should have variable setting. Setting value should allow to set a combination of needed
differential pressure and flow for zone.
• Setting should be lockable to prevent unauthorized change.
• Control valve should have metal to metal sealing to ensure sufficient performance of differential
pressure control at low flows.
• Shut-off service function should be possible to do with hand or a tool. The Dp controller should
have soft sealing to ensure suficient closing in case of zero flow
• Valve should be delivered with min. 2.5 m impulse tube. Diameter of impulse tube should not be
bigger than 1.2 mm.
• Valve should be delivered in reliable packaging for safe transport and handling.
Product characteristics:
a) Pressure class: PN16
b)Max. pressure drop across AB-PM: 4 bar
c) Temperature range: –10 … 120 °C
d)Connections size: DN 40-100
e) Connection type: External tread ISO 228/1 (DN 40, DN50 ), Flange EN1092-2 (DN 65-100)
f) Installation: in return pipe with connection via impulse tube to flow or return pipe
g)Setting range: Flow: 40-100%, ∆p setting : 0-20 turns (DN40, DN50), 0-40 turns (DN65-DN100)
h)Nom. flow at factory setting (∆pr 25 kPa): 5000l/h (DN40), 6500 l/h (DN50), 16800 l/h (DN65),
19600 (DN80), 21000 (DN100)
i) Minimum differential pressure across valve and zone at factory setting 45 kPa (DN40, DN50),
60 kPa (DN65-100)
Tender text