Danfoss AFPB, AFPB-F Data sheet

Data sheet

Differential pressure controller with flow limitation (PN 16, 25, 40)

AFPB / VFQ 2(1) – return mounting, adjustable setting
AFPB-F / VFQ 2(1) – return mounting, fixed setting

Description

Ordering

Example 1:
Differential pressure controller with
flow limitation; return mounting;
DN 15; kVS 4.0; PN 16; metallic
sealing; setting range 0.1- 0.7 bar;
t

150 °C; flange;

max

– 1× VFQ 2 DN 15 valve
Code no: 065B2654
– 1× AFPB actuator
Code no: 00 3G1017
– 1× AFPB DN 15 impulse tube
Code no: 003G1355
– 1× Impulse tube set AF
Code no: 003G1391

Products will be delivered separatly.

AFPB AFPB- F

The controller is a self-acting differential pressure
controller with flow limitation primarily for use in
district heating systems. The controller closes on
rising differential pressure or when set max. flow
is exceeded.

VFQ 2 Valves (metallic sealing cone)

Picture

Note: othe r valves available on special r equest.

1)

At temperat ures above 150 °C only with seal pots (see Accessori es)

DN

(mm)

15 4.0

20 6.3 065B2655 065B2668 065B2678

25 8.0 065B2656 065B2669 065B2679

32 16 065B2657 065B2670 065B2680

40 20 065B2658 065B2671 065B2681

50 32 065B2659 065B2672 065B2682

65 50 065B2660 065B2673 065B2683

80 80 065B2661 065B2674 065B2684

100 125 065B2662 065B2675 065B2685

125 160 065B2663 065B2676 065B2686

k

VS

(m3/h)

Connections

Flanges acc. to

EN 1092 -1

T

(°C)

150

The controller has a control valve with adjustable
flow restrictor, an actuator with one control
diaphragm and spring for differential pressure
setting.

Further on two valve versions are available:
– VFQ 2 with metallic sealing cone
– VFQ 21 with soft sealing cone (on special

request)

Main data:
∙ DN 15 -125
∙ kVS 4.0 -160 m3/h
∙ Flow range: 0.05-120 m3/h
∙ PN 16, 25, 40
∙ Setting range: 0.1-07 bar/0.15-1.5 bar
∙ Temperature:

– Circulation water/glycolic water up to 30 %:

2 … 150/200 °C

∙ Connections:

– Flange

max.

Code No.

PN 16 PN 25 PN 40

065B2654

T

(°C)

200

max.

1)

Code No.

065B2667 065B2677

Impulse tube set AF

Impulse t ube AFPB

© Danfoss | 2018.10 VD.AC.B7.02 | 1

Data sheet Differential pressure controller with flow limitation AFPB(-F) / VFQ 2(1) (PN 16, 25, 40)

Ordering (continuous)

Example 2:
Differential pressure controller with
flow limitation; return mounting;
DN 15; kVS 4.0; PN 25; metallic
sealing; setting range 0.1- 0.7 bar;
t

200 °C; flange;

max

– 1× VFQ 2 DN 15 valve
Code no: 065B2667
– 1× AFPB actuator
Code no: 00 3G1 017
– 1× AFPB DN 15 impulse tube
Code no: 003G1355
– 1× Impulse tube set AF
Code no: 003G1391
– 1× Seal pot V1
Code no: 003G1392

Products will be delivered separatly.

Seal pot V1

Impulse tube set AF

Impulse t ube AFPB

AFPB(-F) Actuators

Picture

∆p setting range

(bar)

0.1 – 0.7

0.15 – 1.5 003 G1016

0.2

0.5 003 G1027

Max. operat. pressure Code No.

25

25

Accessories

Picture Type designation For controller

Impulse tubes

(Stainless steel)

Picture Type designation Description Ordering number Code No.

Impulse tube set AF

Seal pot V1

Compression fitting

port B

Combination piece KF3

3)

port A

Combination piece KF2

1)

2)

AFPB

– 1× Copper tube

Ø10 × 1 × 150 0 mm

– 1 × compression fitting for imp.

tube connection to pipe (G 1/)

– 2 × socket

Capacit y 1 liter; with compression
fittings for imp. tube Ø10

For impulse tube Ø10 connections
to controller

For combination with pressure
actuators. Electrical actuator
connected on side (port B)
only for ON/OFF function

For combination with thermostat ­side connection to port B

DN

(mm)

15

20

25

32

40 003G1359

50 00 3G1360

65

80

100 00 3G1363

125 0 03G136 4

G 11//2× G 11/

PN Code No.

16, 25, 40

–

G 1/ 003G1468

00 3G1017

003 G1026

00 3G1355

00 3G1357

00 3G1361

003G1391

003G1392

00 3G1441

00 3G1440

Shut off valve

Throttle valve 065B2909

1)

Seal pot has to b e used on impulse tubes alwa ys when Tmax ≥ 150 °C

2)

Consist of a nipple , compression ring and nut

3)

Port A - for conn ection of any type of ac tuator

For impulse tube Ø10 –

00 3G1401

Service kits

Picture Type designation For valve

Valve insert VFQ 2

Stuffing cone (with EPDM O -rings) 003G1464

DN

(mm)

15 4.0 065B2796

20 6.3 065B2797

25 8

32 16

40 20

50 32

65 50

80 80

100 125

125 160

k

VS

(m3/h)

Code No.

065B2798

065B2799

065B2800

065B2801

2 | VD.AC.B7.02 © Danfoss | 2018.10

Data sheet Differential pressure controller with flow limitation AFPB(-F) / VFQ 2(1) (PN 16, 25, 40)

2

Technical data

Valve

Nominal diameter DN 15 20 25 32 40 50 65 80 100 125

kVS value

Range
of max.
flow
setting

pSPp

0.2 0 .1

1)

0.5 0.3

1.0 0.5

SISTEM

0.1/0.2/0.5 from

p

0.1

0.2

0.5

b

Cavitation factor z 0.6 0.6 0.6 0. 55 0.55 0.5 0.5 0.45 0.4 0.35

Leakage acc. to
standard IEC 534 (% of kVS)

Nominal pressure PN 16, 25, 40

Min. differential pressure

Max. differential pressure

PN 25, 40 20

Media Circulation water/glycolic water up to 30 %

Media pH Min. 7, max. 10

Media temperature

VFQ 21 2 … 150

Connections Flange

Materials

Valve body

Valve seat Stainless steel, mat. No. 1.4021

Valve cone Stainless steel, mat. No. 1.4404

Sealing

Pressure relieve system Bellows (Stainless steel, mat. No. 1.4571)

1)

Max. flow rate depends o n the differential pressur e over the system (dp System). System is part of the a pplication where dif ferential

pressure is controll ed by AFPB(-F) and for this part the re sistance is well known/defined .

Flow rates in table are sp recified for 3 diffe rent situations.
pSP = p
∆pSP -diff erential pressure set point
∆p

SYSTEM

∆pb -diff erential pressure over flow re strictor

2)

Depends o n the flow rate and valve kVS ; For Q

3)

at temperature s above 150 °C only with sea l pots (see Accessories)

+ p

System

b

-system dife rential pressure

m3/h

4.0 6.3 8.0 16 20 32 50 80 125 160

0.05 0.15 0.25 0.4 0.6 0.9 2 3.5 6.5 11

to 1.4 2.1 2.5 5 6.5 10 16 25 40 50

m3/h

to 2 3 4 7 11 16 28 40 63 80

to 3 4.5 6 10 16 24 40 58 90 12 0

VFQ 2 ≤ 0.03

VFQ 21 ≤ 0.01

2)

3)

PN 16 16

VFQ 2

bar

°C

see remark

2 … 150/2 … 200

PN 16 Grey cast iron EN-GJL-250 (GG-25)

PN 25 Ductile iron EN-GJS-400(GGG- 40.3)

PN 40 Cast steel GP240 GH (GS-C 25)

VFQ 2 Metal

VFQ 21 EPDM





= Q

–> p

set

max

≥ 0.5 bar; For Q

min

< Q

–>

set

max

Q







p

min




p



b



k

VS



15

Actuator

Typ e AFPB AFPB-F

Actuator size cm

Max. operational pressure PN 25

Diff. pressure setting ranges and spring
colours

Materials

Actuator housing Steel, mat. No.1.0338, zinc plated

Control diaphragm EPDM (Rolling; fibre enforced)

bar

2

250

0.1-0.7 0.15-1.5 0.2 0.5

yellow red fixed setting

VD.AC.B7.02 | 3© Danfoss | 2018.10

Data sheet Differential pressure controller with flow limitation AFPB(-F) / VFQ 2(1) (PN 16, 25, 40)

Application principles

AFPB controller must be installed in
the return pipe only.

Direct-connected heating system Indirectly connected heating system

Combinations

Example:
Differential pressure and
temperature controller with f low
limitation; return mounting; DN
15; kVS 4.0; PN 16; metallic sealing;
setting range 0.1-0.7 bar; t
°C; flange;

max

150

– 1× VFQ 2 DN 15 valve
Code no: 065B2654
– 1× AFPB actuator
Code no: 00 3G1017
– 2× Impulse tube set AF
Code no: 003G1391
– 1× AFT06 thermostat
Code no: 065-4390
– 1× Combination piece KF2

Code no: 003G14 40

Products will be delievered
separatelly.

Note:

For AFT 06 thermostat data see
relevant data sheet

AFT 06/KF2/AFPB/VFQ 2

– Differential pressure and temperature controller with

flow limitation, adjustable setting.

Installation positions DN 15-80 T

The controllers can be installed in any position.

DN 15-80 T

≤ 120 °C

max

≤ 120 °C

max

AFT 06/KF2/AFPB-F/VFQ 2

– Differential pressure and temperature controller with

flow limitation, fixed setting.

DN 15-80 T
The controllers can be installed in horizontal

> 120 °C; DN 100-125

max

pipes only, with a pressure actuator oriented
downwards.

DN 15-80 T

> 120 °C; DN 100-125

max

4 | VD.AC.B7.02 © Danfoss | 2018.10