Danfoss AFPQ / VFQ 2, AFPQ 4 / VFQ 2 Data sheet

Data sheet

Diﬀerential pressure and ﬂow controller (PN 16, 25, 40)

AFPQ / VFQ 2(1) - return mounting, adjustable setting AFPQ 4 / VFQ 2(1) - ﬂow mounting, adjustable setting

Description

The controller 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 spring for differential pressure setting. Differential pressure control and flow control are independent.

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 -250 ∙ kVS 4.0-400 m3/h ∙ Flow range: 0.1-250 m3/h ∙ PN 16, 25, 40 ∙ Setting range: 0.1-0.7 bar / 0.15-1.5 bar ∙ Flow restrictor pb: 0.2 bar or 0.5 bar ∙ Temperature:

– Circulation water / glycolic water up to 30 %:

2 … 150/200 °C

∙ Connections:

– Flange

Ordering

Example 1: Differential pressure and flow controller; return mounting; DN 15; kVS 4.0; PN 16; metallic sealing; setting range 0.1-0.7 bar; flow restrictor ∆ pb 0.2 bar; T

150 °C; flange;

max

– 1× VFQ 2 DN 15 valve Code no: 065B2654 – 1× AFPQ actuator Code no: 00 3G10 2 9 – 1× AFPQ DN 15 impulse tubes Code no: 003G1365 – 1× Impulse tube set AF Code no: 003G1391

Products will be delivered separatly.

Impulse t ubes AFPQ

Impulse tube set AF

VFQ 2 Valves (metallic sealing cone)

Picture

At temperature s above 150 °C only with seal p ots (see Accessories)

(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

150 280

200 320 065 B2758 – 065B2688

250 400 065B2759 – 065B2689

(m3/h)

Connections

Flanges acc. to

EN 1092-1

( °C)

150

max

Code No.

PN 16 PN 25 PN 40

065B2654

065B2664

( °C)

200

150

max

Code No.

065B2667 065B2677

– 065B2687

VD.CA.A7.02 | 1

Data sheet Diﬀerential pressure and ﬂow controller AFPQ (4) / VFQ 2(1) (PN 16, 25, 40)

Ordering (continuous)

Example 2: Differential pressure and flow controller; return mounting; DN 15; kVS 4.0; PN 25; metallic sealing; setting range 0.1-0.7 bar; flow restrictor ∆ pb 0.2 bar; T

200 °C; flange;

max

– 1× VFQ 2 DN 15 valve Code no: 065B2667 – 1× AFPQ actuator Code no: 003 G102 9 – 1× AFPQ DN 15 impulse tubes Code no: 003G1365 – 1× Impulse tube set AF Code no: 003G1391 – 1× Seal pot V1 Code no: 003G1392

Products will be delivered separatly.

Seal pot V1 Impulse t ubes AFPQ

Impulse tube set AF

Example 3: Differential pressure and flow controller; flow mounting; DN 15; kVS 4.0; PN 25; metallic sealing; setting range 0.1-0.7 bar; flow restrictor ∆pb 0.2 bar; T flange;

– 1× VFQ 2 DN 15 valve Code no: 065B2667 – 1× AFPQ actuator Code no: 00G10 33 – 4× Impulse tube set AF Code no: 003G1391 – 3× Seal pot V1 Code no: 003G1392

Products will be delivered separatly.

200 °C;

max

Impulse tube set AF

Seal pot V1

Impulse tube set AF

AFPQ / AFPQ 4 Actuators

Picture

∆p setting range

(bar)

0.1-0.7

0.15 -1.5

Flow restrictor ∆p

(bar)

0.2

0.5 003G1030 003G1034

0.2 003G1031 003G1035

0.5 003G1032 003G1036

Nominal pressure

(PN)

AFPQ (retur n) AFPQ 4 (flow)

Code No.

003 G1029 003G1033

Accessories

Picture Type designation For controller

AFPQ

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

port A

Combination piece KF2

AFPQ 4

– 1× Copper tube Ø10 × 1 × 1500 mm – 1 × compression fitting for imp. tube

connection to pipe (G ⁄)

– 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

(mm)

40 003G1369

50 0 03G1370

100 00 3G1373

125 0 03G1374

150 0 03G1375

200

250

40 00 3G1382

50 003G1383

100 003 G1386

125 0 03G1387

150 00 3G1388

200

250

PN Code No.

16, 25, 40

16 00 3G1416

40 00 3G1376

16 00 3G1417

40 003 G1405

16, 25, 40

16 00 3G1418

40 003 G1389

16 00 3G1419

40 003 G1406

– 003G1391

AFPQ 1×

AFPQ 4 3×

G ⁄ 003G1468

G 1⁄ / 2× G 1⁄ 00 3G1441

00 3G1365

00 3G1367

00 3G1371

00 3G1378

00 3G1380

00 3G1384

003G1392

00 3G1440

2 | © Danfoss | 2018.10

Shut off valve

Throttle valve 065B2909

Seal pot has to be use d on impulse tubes always wh en T

Consist of a nipple, com pression ring and nut

With combination pi ece KF2 or KF3 use 2× 003G1391 at PN 16 and T<150 °C. Other wise impulse tubes on speci al request.

Port A - for connect ion of any type of actu ator

For impulse tube Ø10

≥ 150 °C

max

– 00 3G1401

VD.CA.A7.02

Data sheet Diﬀerential pressure and ﬂow controller AFPQ (4) / VFQ 2(1) (PN 16, 25, 40)

Ordering (continuous)

Technical data

Service kits

Picture Type designation For valve

Valve insert VFQ 2

Stuffing cone (with EPDM O-rings) 003G1464

(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

150 280 065B2964

250 400 065B2965

(m3/h)

Code No.

065B2798

065B2799

065B2800

065B2801

Valve

Nominal diameter DN 15 20 25 32 40 50 65 80 100 125 150 200 250

kVS value of p controller

Range of max. flow setting

pb 1) = 0.2 bar

pb 1) = 0.5 bar

from 0.1 0.2 0.2 0.4 0.6 0.8 3 4 6 8 12 15 18

to 2 3 4 7 11 16 28 40 63 80 125 150 180

from 0.2 0.3 0.3 0.5 0.8 1. 2 4 6 9 12 18 22 25

to 3 4.5 6 10 16 24 40 58 90 120 180 220 250

Cavitation factor z 0.6 0.6 0.6 0.55 0.55 0.5 0.5 0.45 0.4 0.35 0.3 0.2 0.2

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

VFQ 2 ≤ 0.03 ≤ 0.05

VFQ 21 ≤ 0.01

Nominal pressure PN 16, 25, 40

Min. differential pressure for max

flow

Max. differential pressure

pb 1) = 0.2

pb 1) = 0.5 0.8 0.7 0.8 0.7 0.8 0.7

PN 16 16

PN 25, 40 20

Media Circulation water / glycolic water up to 30 %

Media pH Min. 7, max. 10

Media temperature

VFQ 2

VFQ 21 2 … 150

Connections Flange

Materials

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

Valve body

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

PN 40 Cast steel GP240GH (GS-C 25)

Valve seat Stainless steel, mat. No. 1.4021

Valve cone Stainless steel, mat. No. 1.4404

Sealing

VFQ 2 Metal

VFQ 21 EPDM

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

∆pb – differe ntial pressure over flow restri ctor

For flows smal ler than Q

at temperatures ab ove 150 °C only with seal pot s (see Accessories)

max

4.0 6.3 8.0 16 20 32 50 80 125 160 280 320 400

m3/h

0.5 0.4 0.5 0.4 0.5 0.4

bar

15 12 10

°C













min

 





2 … 150/2 … 200

2 … 150

Stainless steel,

mat. No. 1.4313

Stainless steel,

mat . No. 1.4021

VD.CA.A7.02

Data sheet Diﬀerential pressure and ﬂow controller AFPQ (4) / VFQ 2(1) (PN 16, 25, 40)

Technical data (continuous)

Application principles

– Return mounting

Actuator

Typ e AFPQ, AFPQ 4

Actuator size cm

Nominal pressure PN 40

Flow restrictor dif f. pressure p

Diff. pressure setting ranges and spring colours

Materials

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

Control diaphragm EPDM (Rolling; fibre enforced)

bar

0.1-0.7 0.15 -1.5

yellow red

250

0.2 / 0.5

– Flow mounting

Direct-connected heating system Indirectly connected heating system

VD.CA.A7.02

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