Danfoss AVQT, AVQMT Data sheet

Data sheet

Flow and temperature controller with / without integrated control valve (PN 25)

AVQT - flow and temperature controller AVQMT - flow and temperature controller with integrated pressure independent control valve

Description

AVQMT

AVQT

AVQT is a self-acting flow and temperature controller primarily for use in district heating systems. The controller closes on rising temperature or when set max. flow is reached.

AVQMT is a self-acting flow and temperature controller with integrated control valve primarily for use in district heating systems. The controller closes on rising temperature or when set max. flow is reached.

AVQT controller can be combined with AVT or STM thermostatic actuators.

AVQMT controller can be combined with Danfoss electrical actuators AMV(E) (and controlled by ECL electronic controllers) and with AVT or STM thermostatic actuators.

The controllers AVQT and AVQMT have a control valve with adjustable flow restrictor, connection neck for thermostat, connection neck for electrical actuator (AVQMT only), and a pressure actuator with one control diaphragm.

AVQMT controllers combined with AMV(E) 13, AMV(E) 23(SL) or AMV(E) 33 electrical actuators are type-tested acc. to EN 14597.

AVQT and AVQMT controllers combined with AVT or STM thermostatic actuators are type-tested acc. to EN 14597.

Controllers combined with STM thermostatic actuators protect systems against exceeding temperatures.

Applications:

- District heating systems acc. to DIN 4747

- Heating systems acc. to EN 12828 (DIN 4751) and EN 12953-6 (DIN 4752)

- Water heating systems for drinking and industrial waters acc. to DIN 4753

Main data:

• DN 15-50

• kVS 0.4-25 m3/h

• Flow range: 0.03-15 m3/h

• PN 25

• Setting ranges:

- AVT thermostatic actuator:

–10 … 40 °C / 20 … 70 °C / 40 … 90 °C / 60 … 110 °C

and

10 … 45 °C / 35 … 70 °C / 60 … 100 °C / 85 … 125 °C

- STM monitor: 20 … 75 °C / 40 … 95 °C / 30 … 110 °C

• Flow restrictor ∆p: 0.2 bar

• Temperature: Circulation water / glycolic water up to 30% 2 … 150 °C

• Connections:

- Ext. thread (weld-on, thread and flange

tailpieces)

- Flange

• Flow and return mounting.

AVQMT is used together with Danfoss electrical actuators:

- AMV 150 1)

- AMV(E) 10 1) / AMV(E) 20 / AMV(E) 30

- AMV(E) 13 1) / AMV(E) 23 / AMV(E) 33 with spring return function

- AMV 20 SL / AMV 23 SL / AMV 30 SL with stroke limitation

AMV 150 / AMV(E) 10 / AMV(E) 13 can be combined with DN 15

controller only.

Data sheet AVQ(M)T (PN 25)

Ordering

Example 1

- AVT (or STM) / AVQT controller: Flow and temperature controller, DN 15; kVS 1.6; PN 25; setting range 40 … 90 °C; flow restrictor Δp 0.2 bar; T

- 1× AVQT DN 15 controller

Code No: 0 03H6759

- 1× AVT thermostatic actuator, 40 … 90 °C Code No: 065-0598

Option:

- 1× Weld-on tailpieces Code No: 003H6908

The controller AVQT will be delivered completely assembled, inclusive impulse tube bet ween valve and actuator. Thermostatic actuator AVT will be delivered separately. In case of safety temp. monitoring STM should be ordered instead of AV T.

Example 2

- AVT (or STM) / AVQMT controller:

Flow and temperature controller with integrated control valve; DN 15; kVS 1.6; PN 25; setting range 40 … 90 °C; flow restrictor Δp 0.2 bar; T

- 1× AVQMT DN 15 controller Code No: 0 03H6772

- 1× AVT thermostatic actuator, 40 … 90 °C Code No: 065-0598

Option:

- 1× Weld-on tailpieces Code No: 003H6908

The controller AVQMT will be delivered completely assembled, inclusive impulse tube between valve and actuator. Thermostatic actuator AVT will be delivered separately. Electrical actuator AMV(E) must be ordered separately. In case of safety temp. monitoring STM should be ordered instead of AV T.

150 °C; ext. thread

max

150 °C; ext. thread

max

AVQT Controller

Picture

Note: Other control lers available on specia l request.

DN k

(mm) (m3/h)

1.6

20 6.3 G 1 A 003H6762 25 8.0 G 1¼ A 003H6763 32 12. 5 40 20 003H6768 50 25 003H6769

2.5 003H6760

4.0 00 3H6761

AVQMT Controller

Picture

DN k

(mm) (m3/h)

0.4

1.0 003 H6771

20 6.3 G 1 A 0 03H6775 25 8.0 G 1¼ A 0 03H6776 32 12. 5 G 1¾ A 003H6777 40 16 G 2 A 003H6778 50 20 G 2½ A 003H 6779 32 12. 5 40 20 003H67 81 50 25 003H6782

1.6 003H6772

2.5 003 H6773

4.0 0 03H6774

AVT Thermostatic actuator

Picture For valves

DN 15 - 25

DN 32 - 50

DN 15 - 50

conic ma le thread EN 10226-1

without im mersion pocket

Setting range

(°C)

–10 … +40

20 … 70 065-0597 40 … 90 065-0598

60 … 110 065-0599

−10 … +4 0

20 … 70 065-0601 40 … 90 065-0602

60 … 110 065-0603

10 … 45

35 … 70 065-0605 60 … 100 065-0606 85 … 12 5 065-0607

ext. thread acc. to

Temperature sensor with brass immersion

Connection Code No.

Cylindr.

ISO 228/1

Flanges PN 25,

acc. to EN 1092-2

Connection Code No.

Cylindr.

ISO 228/1

Flanges PN 25,

acc. to EN 1092-2

pocket, length, connection

170 mm, R ½

210 mm, R ¾

255 mm, R ¾

G ¾ A

1) 2)

003H6759

003H 6767

003H 6770

003H6780

Code No.

065-0596

065-0600

065-0604

STM Safety temperature monitor (actuator)

Picture For valves

DN 15- 50

1) conic male thread EN 10226-1

Setting range

(°C)

30 … 11 0

20 … 75 065-0609 40 … 95 065-0610

Temperature sensor with brass immersion

pocket, length, connection

210 mm, R ¾

Code No.

065-0608

2 | AI173286477015en-010804 © Danfoss | 2021.09

Data sheet AVQ(M)T (PN 25)

Ordering (continuous)

Example 3

- STM / AVT / AVQT controller: Flow and temperature controller with safety temperature monitor, DN 15; kVS 1.6; PN 25; setting range 40 … 90 °C; limit range 30 … 110 °C; flow restrictor Δp 0.2 bar; T

150 °C; ext. thread

max

- 1× AVQT DN 15 controller

Code No: 0 03H6759

- 1× AVT thermostatic actuator, 40 … 90 °C Code No: 065-0598

- 1× STM monitor, 30 … 110 °C Code No: 065-0608

- 1× K2 Combination piece Code No: 003H6855

Option:

- 1× Weld-on tailpieces Code No: 003H6908

The controller AVQT will be delivered completely assembled, inclusive impulse tube bet ween valve and actuator. Combination piece K2, thermostatic actuators AVT and STM will be delivered separately.

Accessories for valves

Picture Type designation DN Connection Code No.

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 20 R ¾ 003H6903 25 R 1 003H6904

Conical ex t. thread acc. to

32 R 1¼ 003H6905 40 R 1½ 065B2004 50 R 2 065B2005 15 20 003H 6916 25 0 03H6 917

EN 1022 6-1

Flanges PN 25, acc. to EN 1092-2

R ½ 003H6902

Accessories for thermostats

Picture Type designation For controllers Material Code No.

Immersion pocket PN 25

Combination piece K2 003H6855

Combination piece K3 003H6856

Not fo r AVT therm ostatic actuators code num bers: 065-0604, 065-0605, 065-0606, 065-0607

AVT / AVQ(M)T DN 15 - 25

AVT / AVQ(M)T DN 32 - 50 STM / AVQ(M)T DN 15 - 50

Stainless steel, mat. No. 1.4571 065- 4415

Stainless steel, mat. No. 1.4435 06 5-4417

Brass 06 5-4 414

Brass 065 -4416

003H6908

003H6915

Service kits

Picture Type designation DN k

Valve insert

Control valve insert 2)

Housing of sensor stuffing box

Actuator

20 6.3 003H6996 25 8.0 003H6867

32 / 40 / 50 12.5 / 16 / 20 003H6868

20 6.3 25 8.0

32 / 40 / 50 12.5 / 16 / 20 003H6885

Type designation ∆p setting range (bar) Code No.

(m3/h) Co de No.

0.4 003H6861

1.0 003H6862

1.6 003H6863

2.5 003H6864

4.0 003H6865

0.4

1.0

1.6

2.5

4.0

for sensors

AVT R ½” 065-4420 AVT R ¾” 065- 4421

0.2 003H6843

003H6886 003H6887 003H6888 003H6889 003H6890 003H 6891 003H6 892

For AVQT and AVQMT controll ers

For AVQMT controll ers

AI173286477015en-010804 | 3© Danfoss | 2021.09

Data sheet AVQ(M)T (PN 25)

Technical data

Valve AVQT

Nominal diameter DN 15 20 25 32 40 50

kVS value of dp controller

Range of max. flow setting

pb 1) = 0.2 bar

m3/h

min

max

1.6 2.5 4.0 6.3 8.0 12.5 20 25

0.03 0. 07 0.07 0.16 0.2 0.4 0.8 0.8

0.9 1.6 2.4 3.5 4.5 10 12 15 Cavitation factor z ≥ 0.6 ≥ 0.55 ≥ 0.5 Leakage acc. to standard IEC 534 % of k

≤ 0.02 ≤ 0.05

Nominal pressure PN 25 ∆p required for Qmax Max. differential pressure 20 16

0.5 0.6 0.6 0.5 0.5 0.8 0.6 0.6

bar

Medium Circulation water / glycolic water up to 30% Medium pH Min. 7, max. 10 Medium temperature

Connections

valve External thread Flange tailpieces Weld-on, external thread and flange -

C 2 … 150

Materials

thread Red bronze CuSn5ZnPb (Rg5) Ductile iron

Valve body

flange -

EN-GJS-400-18-LT (GGG

40. 3) Valve seat Stainless steel, mat. No. 1.4571 Valve cone Dezincing free brass CuZn36Pb2As Sealing EPDM Pressure relieve system

∆pb - differe ntial pressure over flow restri ctor

For flows smal ler than Q

max

p 

min











 





Piston

Valve AVQMT

Nominal diameter DN 15 20 25 32 40 50

value of dp controller

max

min

max

Range of flow setting

p

= 0.2 bar

MCV

Available ∆p required for Q Stroke mm 5 7 10 Control valve authority 1 (100%) in the range of flow set ting Control characteristic Logarithmic 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

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 DP EPDM Sealing MC V Metal EPDM

Pressure relieve system

Control valve insert - Piston Valve insert Piston

Note:

DP - diff. pressu re controller MCV - control valve

Flanged version

For flows smal ler than Q

max





p 



min





0.4 1.0 1.6 2.5 4.0 6.3 8.0 12. 5 16/ 20 1)20/25

0. 015 0.02 0.03 0.07 0.07 0.16 0.2 0.4 0.8 0.8

m3/h

0.18 0.4 0.9 1.6 2.4 3.5 4.5 10 10.5/121)12/ 141)

bar 0.4 0.4 0.5 0.6 0.6 0.5 0.5 0.8 0.8/0.61)0.8/0.6

bar

C 2 …1 50

≤ 0.02 ≤ 0.05

see remark

Weld-on and external thread

Flange -

Ductile iron

EN-GJS-400 -18-LT

(GGG 40.3)

 

 

Data sheet AVQ(M)T (PN 25)

Technical data (continuous)

Actuator

Typ e AVQT, AVQ MT

Actuator size cm Nominal pressure PN 25 Flow restrictor diff. pressure bar 0.2

Materials

Housing

Upper housing of actuator Stainless steel, mat. No.1.4301

Lower housing of actuator Dezincing free brass CuZn36Pb2As Diaphragm EPDM Impulse tube Copper tube Ø 6 x 1 mm

AVT Thermostatic actuator

Setting range X

°C

Time constant T acc. to EN 14597 s max. 50 (170 mm, 210 mm), max. 30 (255 mm) Gain K

mm/°K 0. 2 (170 mm); 0.3 (210 mm); 0.7 (255 mm) Max. adm. temperature at sensor 50 °C above maximum setpoint Max. amb. temperature at thermostat °C 0 … 70 Nominal pressure sensor Nominal pressure immersion pocket

PN 25

Capillary tube length 5 m (170 mm, 210 mm), 4 m (255 mm)

Materials

Temperature sensor Cooper

Ms design Brass, nickel-plated

Immersion pocket

Stainless steel design Mat. No. 1.4571 (170 mm), mat. No. 1.4435 (210 mm) Handle for temp. setting Polyamide, glass fiber-reinforced Scale carrier Polyamide

for senso r 170 and 210 mm

−10 … 40 / 20 … 70 / 40 … 90 / 60 … 110 10 … 45 / 35 … 70 / 60 … 100 / 85 … 125

STM Safety temperature monitor (actuator)

Limit range X

Time constant T acc. to EN 14597 s max. 10 0 Gain K

Max. adm. temperature at sensor 80 °C above maximum setpoint Max. amb. temperature at thermostat °C 0 … 70 Nominal pressure sensor Nominal pressure immersion pocket Capillary tube length m 5

Materials

Temperature sensor Cooper

Immersion pocket

Ms design Brass, nickel-plated

Stainless steel design mat. No. 1.4435 Handle for temp. setting Polyamide, glass fiber-reinforced Scale carrier Polyamide

°C 20 … 75 / 40 … 95 / 30 … 110

mm/°K 0. 3

PN 25

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Danfoss AVQT, AVQMT Data sheet

Specifications and Main Features

Frequently Asked Questions

User Manual