Data sheet
Flow controller with integrated control valve (PN 16, 25, 40*)
AFQM, AFQM 6 - return and flow mounting
Description
AFQM 6 DN 40, 50 AFQM DN 65-125 AFQM DN 150-250
AFQM(6) is a self-acting flow controller with
integrated control valve with full authority,
primarily for use in district heating systems. The
controller closes when set max. flow is exceeded.
In combination with Danfoss electrical actuators
AMV(E) can be controlled by ECL electronic
controllers.
The AFQM (6) is pressure independent which
means that the control characteristic is
independent from the available pressure and is
not influenced by a low authority.
The controller has a control valve with adjustable
flow restrictor, connection neck for electrical
actuator and an actuator with one control
diaphragm. Further on control valve can be:
- not pressure relieved (AFQM 6 DN 40-50) or
- pressure relieved (AFQM DN 65-250).
Controllers are used together with Danfoss
electrical actuators:
• AFQM 6 PN 16/25, AFQM PN 16/25 DN 65-125 3)
- AMV(E) 65x
without spring return function and with
manual operation:
- AMV(E) 655
spring return function and manual operation:
- AMV(E) 658 SD
2)
spring return function:
- AMV(E) 659 SD 1)
• AFQM 6 PN 16/25, AFQM PN 16/25 DN 65-125
- AMV(E) 55, 56
• AFQM PN 16 DN 150-250
- AMV(E) 85, 86
1)
DIN approved , according to EN 1457
2)
not DIN approved
3)
For AFQM 6 PN 16/25 and AFQM PN 25/40 controllers ,
produced be fore March 2015, adapter code 0 65B3527 need
to be separately o rdered
Main data:
• DN 40-250
• kVS 20-400 m3/h
• Flow range 2.2-420 m3/h
• PN 16, 25
* PN 40 on special request
• Flow restrictor ∆pb: 0.2 or 0.5 bar
• Temperature:
- Circulation water / glycolic water up to 30 %:
2 … 150 °C for DN 40-125
2 … 140 °C for DN 150-250
• Connections:
- Flange
• AFQM 6 and AFQM PN 25 combined with
AMV(E) 659 SD have been DIN approved
according to EN 14597.
© Danfoss | 2017.02
VD.LR.A8.02 | 1
Data sheet Flow controller with integrated control valve AFQM(6), PN 16, 25, 40*
Ordering
Example:
Flow controller with integrated
control valve, DN 65, kVS 50,
PN 16, flow restrictor Δpb 0.2 bar,
T
150 °C, flange
max
- 1× AFQM DN 65 controller
Code No.: 003G6056
The controller will be delivered
completely assembled, inclusive
impulse tubes bet ween valve and
actuator. Electrical actuator AMV(E)
must be ordered separately.
AFQM 6 Controller
Picture DN
AFQM Controller
Picture DN
kVS
m3/h
40 20
50 32 003 G1083
40 20
50 32 003 G1085
k
VS
(m3/h) ΔPb=0.2 bar ΔPb=0.5 bar
65 50
80 80 003G6057 003G6064
100 125 003G6058 003G6065
125 160 003G6059 003G6066
150 280 003G6060 003G6067
200 320 003G6061 003G6068
250 400 003G6062 003G6069
65 50
80 80 003G108 9
100 125 003G10 90
125 160 003G10 91
PN Connection Code No.
16
Flange EN 1092-1
25
PN Connection
16
Flange EN 1092-1
25
003 G1082
003 G1084
003G6056 003G6063
003 G1088
Code No.
—
Service kits
Picture Type designation DN k
Valve insert
Control valve insert
Type designation For controller Δpb (bar) Code No.
AFQM 6
Actuator
Connection kit AMV(E) 41x, 61x, 63x/AFQM 6 00 3G1425
Connection kit AMV(E) 41x , 61x, 63x/AFQM 00 3G1426
AFQM
Type designation Code No.
65/80 50/80 065B2794
100/125 125/160 065B2795
65 50 065B2972
80 80 065B2973
(m3/h) Code No.
VS
0.2
0.5 003G1027
003 G1024
003 G1026
2 | VD.LR.A8.02
© Danfoss | 2017.02
Data sheet Flow controller with integrated control valve AFQM(6), PN 16, 25, 40*
Technical data
AFQM 6 valve
Nominal diameter DN 40
k
value
VS
Range of max.
flow setting
∆p
1)
= 0.2 bar
b
m3/h
from 2.2 3.2
to 11 16
20 32
Stroke mm 8 12
Control valve authority % 100
Control characteristic Linear
Cavitation factor z 0.55 0.5
Leakage acc. to standard IEC 534 % of k
VS
Nominal pressure PN 16, 2 5
Min. differential pressure
Max. dif ferential pressure PN 16 16
bar
Max. dif ferential pressure PN 25 20
Medium Circulation water / glycolic water up to 30%
Medium pH Min .7, ma x.1 0
Medium temperature °C 2 … 150
Connections Flange
Materials
Valve body
PN 16 Grey cast iron EN-GJL-250 (GG-25)
PN 25 Ductile cast iron EN -GJS-400-18-LT (GGG-40.3)
Valve seat DP, CV Stainless steel mat. No. 1.4021
Valve cone DP, CV Stainless steel mat. No. 1.4404
Sealing DP EPDM
Sealing CV Metal
Pressure relieve
system
Control valve insert -
Valve insert Bellows (Stainless steel mat. No. 1.4571)
Note:
DP - diff. pressu re controller, CV - control valve
1)
∆pb - differe ntial pressure over flow restri ctor
2)
Depends o n the flow rate and valve kVS ; For Q
3)
Could be conver ted by actuator AME 65x to logarithm ic
= Q
-> ∆p
set
max
≥ 0.5 bar; For Q
min
< Q
set
≤ 0.01
see remark
->
p
max
50
3)
2)
2
Q
min
p
k
VS
b
AFQM 6 Actuator
For valve DN 40 50
Actuator size cm
Max. operational pressure
Flow restrictor dif f. pressure
ΔP
b
Materials
Housing Stainless steel M. No. 1.0338
Diaphragm
Impulse tube Stainless steel tube Ø10 × 0.8 mm
bar
2
250
25
0.2
EPDM (Rolling; fibre enforced)
© Danfoss | 2017.02
VD.LR.A8.02 | 3
Data sheet Flow controller with integrated control valve AFQM(6), PN 16, 25, 40*
Technical data (co ntinuous)
AFQM valve
Nominal diameter DN 65 80 10 0 125 150 200 250
kVS value m3/h 50 80 125 160 280 320 400
from
to 28 40 63 80 145 190 280
m3/h
from 5.6 8.0 12.6 16 30 38 56
to 40 58 76 91 220 285 420
Range of max.
flow setting
∆pb 1) = 0.2 bar
∆pb 1) = 0.5 bar
Stroke mm 12 18 20 25 27
Control valve authority % 100
Control characteristic Linear
Cavitation factor z 0.5 0.4 0.35 0.3 0.3 0.2 0.2
Leakage acc. to standard IEC 534 % of k
Nominal pressure PN 16, 2 5 16
Min. differential pressure
Max. dif ferential pressure PN 16 16 16 15 15 12 10 10
bar
Max. dif ferential pressure PN 25 20 20 15 15 -
Medium Circulation water / Glycolic water up to 30 %
Medium pH Min .7, ma x.1 0
Medium temperature °C 2 … 150 2 … 140
Connections Flange
Materials
Valve body
PN 16 Grey cast iron EN-GJL-250 (GG-25)
PN 25 Ductile iron EN- GJS-400 -18-LT (GGG-40. 3) -
Valve seat DP, CV Stainless steel M. No. 1.4021
Valve cone DP, CV Stainless steel mat No. 1.4404 Stainless steel mat. No. 1.4021
Sealing DP, CV EPDM
Pressure relieve
system
Control valve insert
Valve insert Diaphragm (EPDM)
Note:
DP - diff. pressu re controller, CV - control valve
1)
∆pb - differe ntial pressure over flow restri ctor
2)
Depends o n the flow rate and valve kVS ; For Q
3)
Could be conver ted by actuator AME 65x to logarithm ic
5.6 8.0 12.6 16 30 38 56
3)
VS
≤ 0.01
see remark
2)
Bellows
(stainless steel mat No. 1.4571)
= Q
-> ∆p
set
max
≥ 0.5 bar; For Q
min
< Q
->
max
p
min
set
2
Q
k
VS
p
Piston
b
AFQM actuator
For valve DN 65 80 10 0 125 15 0 200 250
Actuator size cm
Max. operational pressure
Flow restrictor dif f. pressure
∆pb 0.2 or 0.5
Materials
Housing Stainless steel M. No. 1.0338
Diaphragm EPDM (Rolling; fibre enforced)
Impulse tube Stainless steel tube Ø10 × 0.8 mm
bar
2
250
16 or 25
4 | VD.LR.A8.02
© Danfoss | 2017.02
Data sheet Flow controller with integrated control valve AFQM(6), PN 16, 25, 40*
Application principles
- Return mounting
Direct-connected heating system Indirectly connected heating system
- Flow mounting
Direct-connected heating system Indirectly connected heating system
Installation positions DN 40-80 T
The controllers can be installed with (connection
neck for) electrical actuator oriented horizontal
or upwards.
DN 40-80 T
DN 100-250
The controllers can be installed with (connection
neck for) electrical actuator oriented upwards.
≤ 120 °C
max
> 120 °C
max
DN 40-80 T
DN 40-80 T
DN 100-250
≤ 120 °C
max
> 120 °C
max
© Danfoss | 2017.02
VD.LR.A8.02 | 5
Data sheet Flow controller with integrated control valve AFQM(6), PN 16, 25, 40*
Pressure temperature diagram
PN 25
PN 16
EN -GJL-2 50
(GG -25)
Maximum allowed operating pressure as a function of medium temperature (according to EN 1092-2)
EN-GJS- 400
(GGG-40.3)
Flow diagram
Sizing and setting diagram
Relation between actual flow and number of revolutions on flow restictor. Values given are approximate.
DN 250 kVS 400
DN 200 kVS 320
DN 150 kVS 280
DN 125 kVS 160
DN 100 kVS 125
DN 80 kVS 80
DN 65 kVS 50
DN 50 kVS 32
DN 40 kVS 20
6 | VD.LR.A8.02
Flow can be adjusted by turning flow restrictor screw
counter-clockwise as shown in this diagram
1 = 360º
Water flow shown at differential pressure across flow
restrictor 0.2 bar (20 kPa) and across the controller
from 0.5 bar (50 kPa) to max. diff. pressure.
© Danfoss | 2017.02
Data sheet Flow controller with integrated control valve AFQM(6), PN 16, 25, 40*
Flow diagram
Sizing and setting diagram
Relation between actual flow and number of revolutions on flow restictor. Values given are approximate.
DN 250 kVS 400
DN 200 kVS 320
DN 150 kVS 280
DN 125 kVS 160
DN 100 kVS 100
DN 80 kVS 80
DN 65 kVS 50
Flow can be adjusted by turning flow restrictor screw
counter-clockwise as shown in this diagram
1 = 360º
Water flow shown at differential pressure across flow
restrictor 0.5 bar (50 kPa) and across the controller
from 0.5 bar (50 kPa) to max diff. pressure.
© Danfoss | 2017.02
VD.LR.A8.02 | 7
Data sheet Flow controller with integrated control valve AFQM(6), PN 16, 25, 40*
Sizing
- Directly connected heating
system
Example 1
Motorised control valve (MCV) for mixing circuit
in direct-connected heating systems requires
differential pressure of 0.2 bar (20 kPa) and flow
less than 8000 l/h.
Given data:
Q
= 8.0 m3/h (8000 l/h)
max
∆p
= 0.8 bar (80 kPa)
min
1)
∆p
= 0.1 bar (10 kPa)
circuit
∆p
= 0.2 bar (20 kPa) selected
MCV
Remark:
1)
∆p
corresponds to the r equired pump pressure in the
circuit
heating circuit a nd is not to be considered when sizin g the
AFQM.
The total (available) pressure loss across the
controller is:
∆p
= ∆p
∆p
AFQM,A
AFQM,A
min
= 0.8 bar (80 kPa)
Possible pipe pressure losses in tubes, shut-off
fittings, heatmeters, etc. are not included.
Select controller from flow diagram, page 7,
with the smallest possible kVS value considering
available flow ranges.
kVS = 20 m3/h
The min. required differential pressure across
the selected controller is calculated from the
formula:
p
∆p
∆p
MIN,AFQM
= 0.36 bar (36 kPa)
AFQM,MI N
> ∆p
AFQM,A
Q
max
k
VS
AFQM,MIN
2
p
MCV
2
0.8
20
2.0
0.8 bar > 0.36 bar
Solution:
The example selects AFQM 6 DN 40, kVS value 20,
flow setting range 2.2-11 m3/h.
8 | VD.LR.A8.02
© Danfoss | 2017.02
Data sheet Flow controller with integrated control valve AFQM(6), PN 16, 25, 40*
Sizing (continuous)
- Indirectly connected heating
system
Example 2
Motorised control valve (MCV) for indirectly
connected heating system control requires
differential pressure of 0.2 (20 kPa) bar and flow
less than 22.000 l/h.
Given data:
Q
= 22 m3/h (22.000 l/h)
max
∆p
= 0.8 bar (80 kPa)
min
∆p
∆p
= 0.1 bar (10 kPa)
exchanger
= 0.2 bar (20 kPa) selected
MCV
The total (available) pressure loss across the
controller is:
∆p
= ∆p
AFQM,A
∆p
= 0.7 bar (70 kPa)
AFQM,A
min
−∆p
exchanger
= 0.8−0.1
Possible pipe pressure losses in tubes, shut-off
fittings, heatmeters, etc. are not included.
Select controller from flow diagram, page 7,
with the smallest possible kVS value considering
available flow ranges.
kVS = 50 m3/h
The min. required differential pressure across
the selected controller is calculated from the
formula:
∆p
∆p
p
MIN,AFQM
= 0.39 bar (39 kPa)
AFQM,MIN
> ∆p
AFQM,A
Q
AFQM,MIN
2
.max
p
MCV
k
VS
2
22
50
2.0
0.7 bar > 0.39 bar
Solution:
The example selects AFQM DN 65, kVS value 50,
flow setting range 5.6-28 m3/h.
© Danfoss | 2017.02
VD.LR.A8.02 | 9
Data sheet Flow controller with integrated control valve AFQM(6), PN 16, 25, 40*
18
Design
1. Valve body
2. Control valve insert
3. Adjustable flow restrictor
4. Control valve stem
5. Valve seat
6. Actuator
7. Control diaphragm for flow
control
8. Built-in spring for flow rate
control
9. Excess pressure safety valve
10. Valve insert
11. Pressure relieved valve cone
12. Valve stem
13. Bellows for pressure relief of
valve cone
14. Diaphragm for pressure relief
of valve cone
15. Impulse tube
16. Union nut
17. Upper casing of diaphragm
18. Lower casing of diaphragm
19. Cover
20. Bellows for pressure relieve
of control valve cone
10
19
15
17
4
2
3
1
5
11
13
12
15
16
8
6
7
19
15
17
4
2
20
1
3
5
11
10
13
12
15
16
8
6
9
7
18
AFQM 6 DN 40, 50
AFQM DN 65-125
AFQM DN 150-250
Function
10 | VD.LR.A8.02
Flow volume causes pressure drop across the
adjustable flow restrictor. Resulting pressures
are being transferred through the impulse tubes
to the actuator chambers and act on control
on falling differential pressure to control max
flow.
Additionally the electrical actuator will operate
from zero to set max. flow according to the load.
diaphragm for flow control. The flow restrictor
diff. pressure is controlled and limited by means
of built-in spring for flow control. Control valve
closes on rising differential pressure and opens
Controller AFQM is equipped with excess
pressure safety valve, which protect control
diaphragm for flow control from too high
differential pressure.
© Danfoss | 2017.02
Data sheet Flow controller with integrated control valve AFQM(6), PN 16, 25, 40*
Settings
Dimensions
Flow setting
Flow setting is being done by the adjustment of
the flow restrictor position. The adjustment can
be performed on the basis of flow adjustment
diagram (see relevant instructions) and/or by the
means of heat meter.
L
2
H
1
H
Ø 263
AMV(E) 55, 56/AFQM 6
L
2
H
1
H
Ø 263
AMV(E) 65X/AFQM 6
3)
L
H
DN
40
200 390 645 17
50
230 390 645 22
1
mm (kg)
H
2
Valve weight
L
DN
40
50
H1H
mm (kg)
200 390 590 17
230 390 590 22
Valve weight
2
© Danfoss | 2017.02
VD.LR.A8.02 | 11
Danf
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All trademarks in this material are property of the respec
Data sheet Flow controller with integrated control valve AFQM(6), PN 16, 25, 40*
Dimensions (continuous)
4
H
3
2
H
H
1
1
H
L
AMV(E) 55, 56/AFQM
DN 65-125, PN 16/25
3)
For AFQM 6 PN 16/25 and AFQM PN 25/40 controllers , produced before March 2015, adapter code 0 65B3527 need to be
H
L
AMV(E) 65X/AFQM
DN 65-125, PN 16/25
3)
1
H
L
AMV(E) 85, 86/AFQM
DN 150-250, PN 16
separately ord ered
DN
L
H
H
1
H
2
3
mm PN 16 PN 25
Valve weight (kg)
H
4
65 290 425 604 640 - 52 58.5
80 310 425 624 650 - 61 60.5
100 350 530 634 665 - 93.6 96
125 400 530 664 690 - 117. 2 13 9
150 480 576 - - 455 142 -
200 600 652 - - 483 219 -
250 730 656 - - 533 342 -
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.
12 | VD.LR.A8.02
tive companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
© Danfoss | DHS-SRMT/SI | 2017.02
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