Danfoss AVDS, AVD Data sheet

Data sheet

Pressure reduction controllers (PN 25)

AVD - for water

AVDS - for steam

Description

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.

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: 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, Tmax 150 °C, 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 between valve and actuator.

AVD Controller

		DN	kVS			Pressure	Pressure
	Picture			Connection		setting range	Code No. setting range	Code No.
		(mm)	(m3/h)
						(bar)	(bar)
			0.4				003H6957	003H6978
		15	1.0	Cylindr. ext.	G ¾ A		003H6958	003H6979
			4.0	thread acc. to			003H6644	003H6650
		20	6.3	ISO 228/1	G 1 A		003H6645	003H6651
						1-5
		25	8.0		G 1¼ A		3-12	003H6652
							003H6646
		32	12.5	Flanges PN 25,			003H6659	003H6662
		40	20				003H6660	003H6663
				acc. to EN 1092 2
		50	25				003H6661	003H6664

Note: other controllers available on special request.

© Danfoss | 2020.05

AI083286470175en-000504 | 1

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

Ordering (continuous)

Example 2 - AVDS controller: Pressure reduction controller for steam, DN 15, kVS 3.2, PN 25, setting

range 1-5 bar, Tmax 200 °C, ext. thread

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

-1× Impulse tube set AV 1⁄8 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.

AVDS Controller 1)

		DN	kVS			Pressure			Pressure
	Picture			Connection		setting range	Code No.	setting range		Code No.
		(mm)	(m3/h)
						(bar)			(bar)
			1.0				003H6665			003H6670
		15	1.6	Cylindr. ext.	G ¾ A		003H6666			003H6671
			3.2				003H6667			003H6672
				thread acc. to		1-5			3-12
		20	4.5	ISO 228/1	G 1 A		003H6668			003H6673
		25	6.3		G 1¼ A		003H6669			003H6674
	1) Seal pot has to be used on impulse tubes always in steam applications when T ≥ 150 °C
						max
	Accessories
	Picture		Type designation		DN		Connection			Code No.
					15					003H6908
		Weld-on tailpieces			20		-			003H6909
					25					003H6910
					15	Conical ext. thread acc. to			R ½	003H6902
		External thread tailpieces			20				R ¾	003H6903
						EN 10226-1
					25				R 1	003H6904
					15					003H6915
		Flange tailpieces			20	Flanges PN 25, acc. to EN 1092-2				003H6916
					25					003H6917
					Description:				R 1⁄8	003H6852
		Impulse tube set AV			- 1× copper tube Ø 6 × 1 × 1500 mm				R 3⁄8	003H6853
					- 1× compression fitting) for imp. tube
					connection to pipe Ø 6 × 1 mm				R ½	003H6854
		1) 10 compression fittings for impulse tube connection to pipe, Ø 6 × 1 mm R 1⁄8								003H6857
		1) 10 compression fittings for impulse tube connection to pipe, Ø 6 × 1 mm R 3⁄8								003H6858
		1) 10 compression fittings for impulse tube connection to pipe, Ø 6 × 1 mm R ½								003H6859
		1) 10 compression fittings for impulse tube connection to actuator, Ø 6 × 1 mm G 1⁄8								003H6931
		Shut off valve Ø 6 mm								003H0276
		2) Seal pot, 0.3 l, with two compression fittings Ø 6 × 1 mm								003H0277

1)Compression fitting consists of a nipple, compression ring and nut.

2)Seal pot has to be used on impulse tubes always in steam applications when Tmax ≥ 150 °C

Service kits

Picture	Type designation	DN	kVS	Code No.
			(m3/h)
			0.4	003H6869
		15	1.0	003H6870
	Valve insert 1)		4.0	003H6873
		20	6.3	003H6874
		25	8.0	003H6875
		32/40/50	12.5/20/25	003H6876
		15	3.2
	Valve body extension with stuffing box 2)	20	4.5	003H6877
		25	6.3
			Pressure setting range	Code No.
			(bar)
	Actuator with setting spring		1-5	003H6844
			3-12	003H6845

1)for AVD controller only

2)for AVDS controller only

2 | AI083286470175en-000504

© Danfoss | 2020.05

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

≥ 0.55

≥ 0.5

Leakage acc. to standard IEC 534

% of kVS

≤ 0.02

≤ 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

kVS 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 kVS

≤ 0.02

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

°C

2 … 200 1)

Connections

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

1) Seal pot has to be used on impulse tubes always in steam applications when T

≥ 150 °C

max

Actuator

Type

AVD, AVDS

Actuator size

cm2

54

Nominal pressure

PN

25

Pressure setting ranges and

bar

1-5

3-12

spring colours

blue

black, green

Materials

Actuator

Upper casing of diaphragm

Stainless steel, mat. No.1.4301

housing

Lower casing of diaphragm

Dezincing free brass CuZn36Pb2As

Diaphragm

EPDM

Impulse tube

Copper tube Ø 6 × 1 mm

© Danfoss | 2020.05

AI083286470175en-000504 | 3