Danfoss AVPB, AVPB-F Data sheet

Data sheet

Differential pressure controller with flow limitation (PN 25)

AVPB - return mounting, adjustable setting AVPB-F - return mounting, fixed setting

Description		AVPB (-F) is a self-acting differential pressure
		controller with flow limitation 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 one control
		diaphragm and handle for differential pressure
		setting (fixed setting version is without handle).

Main data:

•	DN 15-50
•	kVS 1.6-25 m3/h
• Flow range 0.03-15 m3/h
•	PN 25
•	Setting range (AVPB): 0.2-1.0 bar/0.3-2.0 bar
• Fixed setting (AVPB-F): 0.5 bar
•	Temperature:
	Circulation water/glycolic water up to 30%:
	2 … 150 °C
•	Connections:
	- Ext. thread (weld-on, thread and flange tailpieces)
	- Flange

Ordering

Example:

Differential pressure controller with flow limitation; DN 15; kVS 1.6; PN 25; setting range 0.2-1.0 bar; tmax 150 °C; ext. thread

-1× AVPB DN 15 controller Code No: 003H6444

-1× Impulse tube set AV, R 1⁄8 Code No: 003H6852

Option:

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

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

AVPB Controller

	Picture	DN	kVS	Connection		∆p setting range	Code No.	∆p setting range	Code No.
		(mm)	(m3/h)			(bar)		(bar)
			1.6				003H6444		003H6452
		15	2.5		G ¾ A		003H6445		003H6453
			4.0	Cylindr.			003H6446		003H6454
		20	6.3	ext.	G 1 A		003H6447		003H6455
		25	8.0	thread	G 1¼ A		003H6448		003H6456
				acc. to
		32	12.5	ISO 228/1	G 1¾ A	0.2-1.0	003H6449	0.3-2.0	003H6457
		40	16		G 2 A		003H6450		003H6458
		50	20		G 2½ A		003H6451		003H6459
		32	12.5	Flanges PN 25,			003H6468		-
		40	20				003H6469		-
				acc. to EN 1092-2
		50	25				003H6470		-

Note: other controllers available on special request.

© Danfoss | 2016.09

VD.DB.P6.02 | 1

Data sheet

Differential pressure controller with flow limitation AVPB(-F) (PN 25)

Ordering (continuous)	AVPB-F Controller
	Picture	DN	kVS	Connection		∆p setting range	Code No.
		(mm)	(m3/h)			(bar)
			1.6				003H6460
		15	2.5	Cylindr.	G ¾ A		003H6461
							003H6462
			4.0	ext. thread acc. to
		20	6.3	ISO 228/1	G 1 A		003H6463
						0.5
		25	8.0		G 1¼ A		003H6464
		32	12.5				003H6474
		40	20	Flanges PN 25, acc. to EN 1092-2			003H6475
		50	25				003H6476

Note: other controllers available on special request.

Accessories

Picture	Type designation	DN	Connection		Code No.
		15			003H6908
		20			003H6909
	Weld-on tailpieces	25	-		003H6910
		32			003H6911
		40			003H6912
		50			003H6913
		15		R ½	003H6902
		20		R ¾	003H6903
	External thread tailpieces	25	Conical ext. thread acc. to	R 1	003H6904
		32	EN 10226-1	R 1¼	003H6905
		40		R 11/2	065B2004
		50		R 2	065B2005
		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	- 1x copper tube Ø6 × 1 × 1500 mm		R 3/8	003H6853
		- 1x compression fitting1)
				R 1/2	003H6854
		for imp. tube connection to pipe Ø6 × 1 mm
	1) 10 compression fittings for imp. tube connection to pipe, Ø6 × 1 mm R 1/8				003H6857
	1) 10 compression fittings for imp. tube connection to pipe, Ø6 × 1 mm R 3/8				003H6858
	1) 10 compression fittings for imp. tube connection to pipe, Ø6 × 1 mm R 1/2				003H6859
	1) 10 compression fittings for imp. tube connection to actuator, Ø6 × 1 mm G 1/8				003H6931
	Shut off valve Ø6 mm				003H0276

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

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Data sheet

Differential pressure controller with flow limitation AVPB(-F) (PN 25)

Ordering (continuous)	Service kits
	Picture	Type designation	DN	kVS	Code No.
				(m3/h)
				1.6	003H6863
			15	2.5	003H6864
		Valve insert		4.0	003H6865
			20	6.3	003H6866
			25	8.0	003H6867
			32/40/50	12.5/16/20/25	003H6868
		Type designation		Δp setting range	Code No.
				(bar)
		Actuator with adjustable handle (AVPB)		0.2-1.0	003H6829
				0.3-2.0	003H6830
		Actuator without adjustable handle (AVPB-F)		0.5	003H6841

Technical data	Valve
			Nominal diameter					DN		15			20			25		32				40		50
			kVS value						1.6	2.5		4.0	6.3			8.0		12.5				16/204)		20/254)
			Range of max.				from	m3/h	0.03	0.07		0.07	0.16			0.2		0.4				0.8		0.8
				∆pb 1)		= 0.2 bar
							to		0.86	1.4		2.2	3.0			3.5		8.0				10		12
			flow setting
							or to 3)		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 kVS				≤ 0.02										≤ 0.05
			Nominal pressure					PN						25
			Min. differential pressure					bar					see remark 2)
			Max. differential pressure								20											16
			Medium									Circulation water/glycolic water up to 30%
			Medium pH										Min. 7, max. 10
			Medium temperature					°C						2 … 150
						valve					External thread									Ext. thread and flange
			Connections			tailpieces						Weld-on and external thread
												Flange										-
			Materials
			Valve body			thread				Red bronze CuSn5ZnPb (Rg5)											Ductile iron
						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											Piston
	1)		∆pb - differential pressure over flow restrictor															Q		2
	2)		Depends on the flow rate and valve kVS ; For Qset = Qmax -> ∆pmin ≥ 0.5 bar; For Qset < Qmax											-> p						p
																min						b
																	k VS

3)Higher max flow are achieved at higher differential pressures over AVPB(-F) controller. In general at Δp > 1-1.5 bar

4)Flange valve body

Actuator

Type			AVPB				AVPB-F
Actuator size		cm2			54
Nominal pressure		PN			25
Diff. pressure setting ranges and		bar	0.2-1.0		0.3-2.0		0.5
spring colours			yellow		red		(fixed setting)
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 Ø6 × 1 mm

VD.DB.P6.02

© Danfoss | 2016.09 | 3

Data sheet

Differential pressure controller with flow limitation AVPB(-F) (PN 25)

Application principles

The controller must be installed in the return pipe only.

Direct-connected heating system

Indirectly connected heating system

Installation positions

Up to medium temperature of 100 °C the

controllers can be installed in any position.

For higher temperatures the controllers have to be installed in horizontal pipes only, with a pressure actuator oriented downwards.

Pressure temperature diagram

EN-GJS-400-18-LT (GGG 40.3) PN 25

CuSn5ZnPb (Rg5) PN 25

Maximum allowed operating pressure as a function of medium temperature (according to EN 1092-2 and EN 1092-3).

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VD.DB.P6.02