Danfoss AVDS, AVD Data sheet

Data sheet

Pressure reduction controllers (PN 25)

AVD - for water AVDS - for steam

Description Main data AVD:

• DN 15-50

• kVS 0.4-25 m3/h

• PN 25

• Setting range: 1-5 bar / 3-12 bar

• Temperature:

- Circulation water/glycolic water up to 30 %:

2 … 150 °C

• Connections:

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

tailpieces)

- Flange

Main data AVDS:

• DN 15-25

• kVS 1.0-6.3 m3/h

• PN 25

• Setting range:

AVD AVDS

AVD(S) is a self-acting pressure reduction controller primarily for use in district heating systems. The controller is normally opened and closes on rising pressure.

The controller has a control valve, an actuator with one control diaphragm and a spring(s) for pressure setting.

1-5 bar / 3-12 bar

• Temperature:

- Steam/circulation water/glycolic water

up to 30 %: 2 … 200 °C

• Connections:

- External thread (weld-on, thread and flange

tailpieces)

Ordering

Example 1 - AVD controller: Pressure reduction controller for water, DN 15, kVS 4.0, PN 25, setting range 1-5 bar, T ext. thread

- 1× AVD DN 15 controller Code No: 003H6644

Option:

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

The controller will be delivered completely assembled, inclusive impulse tube bet ween valve and actuator.

max

150 °C,

AVD Controller

Picture

Note: othe r controllers available on s pecial request.

(mm)

(m3/h)

0.4

1.0 003H6958 003H6979

4.0 003H664 4 003H6650 20 6.3 G 1 A 003H6645 003H66 51 25 8.0 G 1¼ A 003H6646 003H6652 32 12. 5 40 20 003H6660 003H6663 50 25 003H6661 003H6664

Connection

Cylindr. ext.

thread acc. to

ISO 228/1

Flanges PN 25,

acc. to EN 1092-2

G ¾ A

Pressure

setting range

(bar)

1-5

Code No.

003H6957

003H6659 003H6662

Pressure

setting range

(bar)

3-12

Code No.

003H6978

Data sheet Pressure reduction controllers AVD(S) (PN 25)

Ordering (continuous)

Example 2 - AVD S controller: Pressure reduction controller for steam, DN 15, kVS 3.2, PN 25, setting range 1-5 bar, T ext. thread

- 1× AVDS DN 15 controller Code No: 003H6667

- 1× Impulse tube set AV ⁄ Code No: 003H6852

Option:

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

- 1× Seal pot Code No: 003H0277

The controller will be delivered completely assembled. External impulse tube (AV) and seal pot must be ordered separately.

200 °C,

max

AVDS Controller 1)

Picture

(mm)

(m3/h)

Connection

Pressure

setting range

(bar)

1.0

1.6 003H6666 003 H6671

Cylindr. ext.

3.2 003H6667 0 03H6672

thread acc. to

20 4.5 G 1 A 003H6668 003H6673

ISO 228/1

G ¾ A

25 6.3 G 1¼ A 003H6669 0 03H6 674

Seal pot has to be us ed on impulse tubes always i n steam applications when T

1-5

≥ 150 °C

max

Code No.

003H6665

Pressure

setting range

(bar)

3-12

Accessories

Picture Type designation DN Connection Code No.

Weld-on tailpieces

20 003H6909 25 00 3H6910 15

External thread tailpieces

Conical ex t. thread acc. to

20 R ¾ 003H 6903

EN 1022 6-1

25 R 1 003H6904 15

Flange tailpieces

Flanges PN 25, acc. to EN 1092-2

20 003H 6916 25 0 03H6 917

Description:

Impulse tube set AV

1× copper tube Ø 6 × 1 × 1500 mm

- 1× compression fitting) for imp. connection to pipe Ø 6 × 1 mm

10 compression f ittings for impulse tube connection to pipe, Ø 6 × 1 mm R ⁄ 003H6857

10 compression f ittings for impulse tube connection to pipe, Ø 6 × 1 mm R ⁄ 003H6858

10 compression f ittings for impulse tube connection to pipe, Ø 6 × 1 mm R ½ 003H6859

10 compression f ittings for impulse tube connection to actuator, Ø 6 × 1 mm G ⁄ 003 H6931

Shut off valve Ø 6 mm 003H0276

tube

R ½ 003H6902

R ⁄ 003H 6852

R ⁄ 003H6 853

R ½ 003H6854

Code No.

003H 6670

003H6908

003H6915

Seal pot, 0.3 l, with two compression fittings Ø 6 × 1 mm 003H0277

Compression f itting consists of a nipple , compression ring and nut.

Seal pot has to be us ed on impulse tubes always i n steam applications when T

Service kits

Picture Type designation DN

32/4 0/50 12.5/20/25 003H6876

Actuator with setting spring

for AVD controller on ly

for AVDS controller o nly

Valve insert

Valve body extension with stuf fing box

≥ 150 °C

max

(m3/h)

Code No.

0.4 003H6869

1.0 003H6 870

4.0 003H6873 20 6.3 0 03H6 874 25 8.0 003H6875

15 3.2

003H687720 4.5

25 6.3

Pressure setting range

(bar)

Code No.

1-5 003H684 4

3-12 003H6845

Data sheet Pressure reduction controllers AVD(S) (PN 25)

Technical data

Valve (AVD)

Nominal diameter DN 15 20 25 32 40 50

kVS value m3/h 0.4 1.0 4.0 6.3 8.0 12. 5 20 25 Cavitation factor z ≥ 0.6 Leakage acc. to standard IEC 534 % of k

≤ 0.02

≥ 0.55 ≥ 0.5

≤ 0.05 Nominal pressure PN 25 Max. differential pressure bar 20 16 Medium Circulation water / glycolic water up to 30 % Medium pH Min. 7, max. 10 Medium temperature °C 2 …150

Connections

valve External thread Flange

tailpieces Weld-on, external thread and flange -

Materials

thread Red bronze CuSn5ZnPb (Rg5) -

Valve body

flange -

Ductile iron

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 Piston

Valve (AVDS)

Nominal diameter DN 15 20 25

value m3/h 1.0 1.6 3.2 4.5 6.3

Cavitation factor z ≥ 0.6 ≥ 0.55 Leakage acc. to standard IEC 534 % of k

Nominal pressure PN 25 Max. differential pressure bar 10 Medium Steam / Circulation water / glycolic water up to 30 % Medium pH Min. 7, max. 10 Medium temperature

Connections

C 2 … 200

valve External thread

tailpieces Weld-on, external thread and flange

Materials

Valve body Red bronze CuSn5ZnPb (Rg5) Valve seat Stainless steel, mat. No. 1.4571 Valve cone Stainless steel, mat. No. 1.4122 Pressure relieve system Bellows

Seal pot has to be us ed on impulse tubes always i n steam applications when T

≥ 150 °C

max

≤ 0.02

Actuator

Typ e AVD, AV DS

Actuator size cm Nominal pressure PN 25

Pressure set ting ranges and spring colours

Materials

Actuator housing

Upper casing of diaphragm Stainless steel, mat. No.1.4301

Lower casing of diaphragm Dezincing free brass CuZn36Pb2As Diaphragm EPDM Impulse tube Copper tube Ø 6 × 1 mm

bar

1-5 3-12

blue black , green

+ 5 hidden pages