Danfoss AVPQ 4 Data sheet
Data sheet
Differential pressure and flow controller (PN 25)
AVPQ – return mounting, adjustable setting
AVPQ 4 – flow mounting, adjustable setting
Description
Ordering
Example:
Differential pressure and flow
controller; return mounting;
DN 15; kVS 1.6; PN 25;
setting range 0.2-1.0 bar;
T
150 °C; ext. thread
max
- 1× AVPQ DN 15 controller
Code No: 00 3H 6531
- 1× Impulse tube set AV, R ⁄
Code No: 003H6 852
Option:
- 1× Weld-on tailpieces
Code No: 003H6908
The controller will be delivered
completely assembled, inclusive
impulse tube(s) between valve and
actuator. External impulse tube (AV)
must be ordered separately.
AVPQ
AVPQ Controller (return mounting)
DN
k
Picture
(mm)
VS
(m3/h)
0.4
1.0 003 H6919 003 H6921
15
1.6 003 H6531 003H6539
2.5 003H6532 003H6540
Cylin dr.
4.0 003H6 533 003H6541
20 6.3 G 1 A 003H6534 003H6542
25 8.0 G 1¼ A 003H6535 003H6543
32 12. 5 G 1¾ A 003H6536 003H6544
40 16 G 2 A 003H6537 003H6545
50 20 G 2½ A 003H6538 003H 6546
32 12. 5
40 20 003H6564 003H 6567
50 25 003H6565 003H 6568
ext.
thread
acc. to
ISO 228/1
Flanges PN 25,
acc. to EN 1092-2
AVPQ 4
Connection
G ¾ A
AVPQ(4) is a self-acting differential pressure
and flow controller primarily for use in district
heating systems. The controller closes on rising
differential pressure or when set max. flow is
exceeded.
The controller has a control valve with adjustable
flow restrictor, an actuator with two control
diaphragms and handle for differential pressure
setting.
Main data:
• DN 15-50
• kVS 0.4-25 m3/h
• Flow range: 0.015-15 m3/h
• PN 25
• Setting range: 0.2-1.0 bar/0.3-2.0 bar
• Flow restrictor ∆pb: 0.2 bar
• Temperature:
Circ. water / glycolic water up to 30% :
2 … 150 °C
• Connections:
- Ext. thread (weld-on, ext. thread and flange
tailpieces)
- Flange
Δp
setting range
(bar)
0. 2-1.0
Code No.
003 H6918
003H6563 003H6566
Δp
setting range
(bar)
0.3-2.0
Code No.
003H6920
© Danfoss | 2017.01
VD.CC.X7.02 | 1
Data sheet Differential pressure and flow controller AVPQ (4) (PN 25)
Ordering (continuous)
AVPQ 4 Controller (flow mounting)
Picture
DN
(mm)
k
VS
(m3/h)
0.4
Connection
Δp
setting range
(bar)
Code No.
003H6922
1.0 003H6923 003H6925
15
1.6 003H 6547 003H6555
2.5 003H6548 003H6556
Cylin dr.
4.0 003H6549 003H6557
20 6.3 G 1 A 003H6550 0 03H6558
25 8.0 G 1¼ A 003H6 551 003H6559
ext.
thread
acc. to
ISO 228/1
G ¾ A
0. 2-1.0
32 12.5 G 1¾ A 003H6552 003H6560
40 16 G 2 A 003H6553 003H6561
50 20 G 2½ A 003H6554 003H6562
32 12.5
40 20 003H 6570 003H6573
Flanges PN 25, acc.
to EN 1092-2
003H6569 003H6572
50 25 003 H6571 0 03H6 574
Δp
setting range
(bar)
0.3-2.0
Accessories
Picture Type designation DN Connection Code N o.
15
20 003H6909
Weld-on tailpieces
External thread tailpieces
Flange tailpieces
25 00 3H6910
32 0 03 H69 11
-
40 00 3H6912
50 0 03H6 913
15
R ½ 0 03H6902
20 R ¾ 003H6903
25 R 1 003H6904
Conical ex t. thread acc. to
EN 10226 -1
32 R 1¼ 003H6905
40 R 1½ 065B2004
50 R 2 065B2005
15
Flanges PN 25, acc. to EN 1092-2
20 003H 6916
25 0 03H6 917
Code No.
003H6924
003H6908
003H 6915
2 | © Danfoss | 2017.01
Description:
Impulse tube set AV
- 1x copper tube Ø6 × 1 × 1500 mm
- 1x compression fitting 1)
for imp. tube connection to pipe Ø6 × 1 mm
1)
10 compression f ittings for imp. tube connection to pipe, Ø6 × 1 mm R ⁄ 003H6857
1)
10 compression f ittings for imp. tube connection to pipe, Ø6 × 1 mm R ⁄ 003H6858
1)
10 compression f ittings for imp. tube connection to pipe, Ø6 × 1 mm R ½ 003H6859
1)
10 compression f ittings for imp. tube connection to actuator, Ø6 × 1 mm G ⁄ 003 H6931
Shut off valve Ø6 mm 003H0276
1)
Compression f itting consists of a nippl e, compression ring and nut.
R ⁄ 0 03H6852
R ⁄ 003H6853
R ½ 003H6854
VD.CC.X7.02
Data sheet Differential pressure and flow controller AVPQ (4) (PN 25)
Ordering (continuous) Service kits
Picture Type designation DN
15
Valve insert
20 6.3 003H6866
25 8.0 003H6867
32 / 40 / 50
k
VS
(m3/h)
0.4 003H6861
1.0 003H6862
1.6 003H6863
2.5 003H6864
4.0 003H6865
12.5 / 16 / 20 / 25
Code No.
003H6868
Technical data
Picture Type designation
∆p setting range
(bar)
Code No.
AVPQ AVPQ 4
0. 2-1.0 003H6 833 003H6838
Actuator with adjustable handle
0.3-2.0 003H6850 0 03H6851
Valve
Nominal diameter DN 15 20 25 32 40 50
kVS value
from
Range of max.
flow setting
∆pb 1) = 0.2 bar
to
or to
m3/h
3)
Cavitation factor z ≥ 0.6 ≥ 0. 55 ≥ 0.5
Leakage acc. to standard IEC 534 % of k
Nominal pressure PN 25
Min. differential pressure
Max. differential pressure 20 16
Medium Circulation water / glycolic water up to 30%
Medium pH Min. 7, max. 10
Medium temperature °C 2 … 150
valve External thread Ext. thread and flange
Connections
tailpieces
Materials
Valve body
thread Red bronze CuSn5ZnPb (Rg5)
flange -
Valve seat Stainless steel, mat. No. 1.4571
Valve cone Dezincing free brass CuZn36Pb2As
Sealing EPDM
Pressure relieve system
1)
∆pb - differe ntial pressure over flow rest rictor
2)
Depends o n the flow rate and valve kVS ; For Q
3)
Higher max flow ar e achieved at higher dif ferential pressures over AVPQ(4) control ler. In general at p > 1-1.5 bar
4)
Flange valve body
0.4 1.0 1.6 2.5 4.0 6.3 8.0 12 .5 16/20 4)20/25
0. 015 0.02 0.03 0.07 0.07 0.16 0.2 0.4 0.8 0.8
0.18 0.4 0.86 1.4 2.2 3.0 3.5 8.0 10 12
- - 0.9 1.6 2.4 3.5 4.5 10 12 15
VS
bar
≤ 0.02 ≤ 0.05
see remark
2)
Weld-on and external thread
Flange -
EN-GJS-400-18-LT (GGG
Piston
= Q
-> ∆p
set
max
≥ 0.5 bar; For Q
min
< Q
->
set
p
max
min
2
Q
p
k
VS
Ductile iron
40. 3)
b
4)
VD.CC.X7.02
© Danfoss | 2017.01 | 3
Data sheet Differential pressure and flow controller AVPQ (4) (PN 25)
Technical data (continuous)
Application principles
- Return mounting
Actuator
Typ e AVPQ AVPQ 4
Actuator size cm
Nominal pressure PN 25
Flow restrictor dif f. pressure, ∆pb bar 0.2
Diff. pressure setting ranges and
spring colours
Materials
Housing
Diaphragm EPDM
Impulse tube Copper tube Ø6 × 1 mm
Upper casing of actuator Stainless steel, mat. No.1.4301
Lower casing of actuator Dezincing free brass CuZn36Pb2As
bar
2
0. 2-1.0 0 .3-2. 0 0.2-1. 0 0.3-2 .0
yellow red yellow red
54
Direct-connected heating system Indirectly connected heating system
- Flow mounting
Direct-connected heating system Indirectly connected heating system
Installation positions Up to medium temperature of 100 °C the
controllers can be installed in any position.
For higher temperatures the controllers have
to be installed in horizontal pipes only, with a
pressure actuator oriented downwards.
4 | © Danfoss | 2017.01
VD.CC.X7.02
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