Danfoss AFQ 2, VFQ 22, VFQ 221 Data sheet

Data sheet

Flow controller (PN 16, 25, 40)

AFQ 2 / VFQ 22(1) – return and flow mounting

Description

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Ordering

Example 1: Flow controller; DN 65; kVS 60; PN 16; metallic sealing; flow restrictor ∆pb 0.2 bar; T

– 1× VFQ 22 DN 65 valve Code no: 065B5570 – 1× AFQ 2 actuator Code no: 003G5600 – 1× AFQ DN 65 impulse tubes Code no: 003G18 43

150 °C; flange;

max

VFQ 22 Valve (metallic sealing cone)

Picture

(mm)

100 160 065B5572 065B5579 065B5586

125 250 065B5573 065B5580 065B5587

150 380 065B 5574 065B5581 065B5588

200 650 065B5575 0 65B5582 065B5589

250 800 065B5576 065B5583 065B5590

(m3/h)

65 60

80 80 065B5571 065B5578 065B5585

Flanges acc. to EN 1092-1 150

Connections

The controller is a self-acting flow controller primarily for use in district heating systems. The controller closes when set max. flow is exceeded. The controller has a control valve with adjustable flow restrictor and an actuator with one control diaphragm.

Further on two valve versions are available:

∙ VFQ 22 with metallic sealing cone ∙ VFQ 221 with soft sealing cone

Main data: ∙ DN 65-250 ∙ kVS 60-800 m3/h ∙ Flow range 5.6-500 m3/h ∙ PN 16, 25, 40 ∙ Flow restrictor ∆pb: 0.2 bar or 0.5 bar ∙ Temperature: – Circulation water / glycolic

water up to 30%: 2 … 150°C

∙ Connections: Flange

(°C)

max.

PN 16 PN 25 PN 40

065B5570 065B5577 065B558 4

Code No.

Products will be delivered separately.

Impulse tubes AFQ 2

VFQ 221 Valve (soft sealing cone)

Picture

(mm)

65 60

80 80 065B5601 065B5608 06 5B5615

100 160 065B5602 065B5609 0 65B5616

125 250 065B5603 065 B5610 0 65B 5617

150 380 065B5604 0 65B5 611 065 B5618

200 650 065B5605 0 65B5 612 065B5 619

250 800 065B5606 0 65B5 613 065B5620

(m3/h)

Connections

Flanges acc. to EN 1092-1 150

(°C)

max.

PN 16 PN 25 PN 40

065B5600 065B5607 0 65B5 614

Code No.

AFQ 2 Actuator

Picture

Δp setting range

(bar)

0,2

0,5

0,2

0,5

Possible combinations with DN

65 80 100 125 15 0 200 250 PN 16 PN 40

   

      

- - -

- - - 003G5601 003G5603

Actuator size

(cm2)

160

320

Code No.

003G5600 003G5602

003G5596 003G5598

003G5597 003G5599

Data sheet AFQ 2/VFQ 22(1)

Ordering (continuous) Impulse tubes

Picture Typ e For controller

Impulse tubes AFQ 2

Service kits

Picture Typ e

Pressure control insert VFQ/Q/22

Pressure control

insert VFQ/Q/221

Pressure stuffing box VFQ/Q/221

for valve DN

(mm)

80 003 G1850

100 003 G1851

125 003G18 52

150 00 3G1853

200 003 G1854

250 003 G1855

(m3/h)

80 80 00 3G1801

160 100 003 G1802

250 125 003G1803

380 150 003G18 04

650 200 003G180 5

800 250 003 G1806

60 65 0 03G1807

80 80 003 G1808

160 100 003 G1809

250 125 003G1810

380 150 00 3G18 11

650 200 003 G1812

800 250 0 03G1813

PN DN Code No.

16/2 5/40

(bar)

65 003G1800

65 -125 003G1730

150-250 003G1731

Code No.

003 G1843

Installation position

The controllers can be installed in any position.

2 | AI373552176233en-010103 © Danfoss | 2022.04

Data sheet AFQ 2/VFQ 22(1)

p

at z = 0,2 ... 0,6 [bar]

Inlet pressure bar p [bar]

z =

Example :

Technical data

VFQ 22(1) Valve

Nominal diameter DN 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 5.6 8 12.6 20 32 54 72

m3/h

to 28 40 63 100 160 270 360

from 8,4 12 19 30 48 68 100

to 42 60 95 150 240 340 500

60 80 160 250 380 650 800

Cavitation factor z 0.65 0.55 0.4 0.4 0.4 0. 35 0.3

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

VFQ 22 ≤ 0.03 ≤ 0.05

VFQ 221 ≤ 0.01

Nominal pressure PN 16, 25, 40

Min. differential pressure

Max. differential pressure PN 16 16

bar

Max. differential pressure PN 25/40 20

see remark

15 15 12 10 10

Pressure relievement system Chamber relieved

Media Circulation water / Glycolic water up to 30 %

Media pH Min.7, ma x.1 0

Media temperature °C 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 / Valve cone Stainless steel, mat. No. 1.4021

Sealing EPDM

∆pb – differe ntial pressure over flow rest rictor

For flows sma ller than Q

max

min





















AFQ 2 Actuator

bar

160 320

16, 4 0

Materials

Actuator size cm

Max. operating pressure

Flow restrictor differential pressure pb 0. 2 / 0.5

For valve DN 65 -125 65-2 50

Actuator housing Steel, mat. No. 1.0345, zinc plated

Control diaphragm EPDM (Rolling; fibre enforced)

Operating area

Maximum allowed differential pressure over the controller (p

max

T = 90°C

T = 100°C

T = 110°C

[bar]

max

p

) at different cavitation factors (z)

max

p = 6 bar T = 140°C z = 0,4

= 1,35 bar

p

max

T = 80°C

T = 130°C

T = 140°C

T = 150°C

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