Danfoss ASV-PV DN 50, ASV-PV DN 65-100, MSV-F2 DN 50-100 Data sheet

Data sheet

Automatic balancing valves

ASV-PV DN 50 -100 (3rd gen.)

Description / Application	Partner valve

ASV-PV

ASV-PV

MSV-F2

DN 50

DN 65-100

DN 50-100

ASV balancing valves are used for dynamic hydronic balance in heating and cooling systems. One of the major challenges in heating and cooling systems is a lack of good hydronic balancing, caused by differential pressure, which is changing constantly and unpredictably in the system. This often results in complaints about poor indoor comfort, noise and high energy bills.

ASV automatic balancing valves ensure an optimal pressure differential for control valves as well as the correct flow within the individual risers at all times. The ASV automatically creates an optimal hydronic balance within the installation, whether under full or partial load. This balance is never disrupted.

Flow limitation

By using combination of pressure controller ASV and settable terminal’s unit valve, f low limitation is established.

F low limitation for each terminal unit prevents underf lows on distant units and overf lows on others thus allows efficient pumping.

Lower noise emission

Differential pressure limitation provides the pressure over the control valve not to increase at partial loads thus noise emission will be lower. (This is the reason why DIN 18380 requires control of differential pressure by partial load.)

No balancing method needed

F low limitation is achieved by adjusting each hydronic loop separately without inf luencing others, which consequently results in one time adjusting process. No special balancing method is needed so commisioning cost can be saved.

Control valve authority

Controlling differential pressure over the control valve means that authority is high – which allows an accurate and stable control as well as energy saving.

Zone balancing

By installing the ASV sets you can divide the piping system in pressure independent zones. This allows a gradual connection of zones to the main in new constructions or at renovation without using an additional

balancing method. There is no need to perform a new commissioning every time the system is changed because the hydronic balance is done automatically.

ASV-PV valves are settable in different ranges:

•5-25 kPa setting is mostly used for radiator application,

•20-40 kPa setting is used for fan coil, chilled beam and f lat station applications,

•35-75 kPa setting is used for f lat station and fan coil, chilled beam application,

•60-100 kPa setting is used for large terminal unit application (air handling units, fan coils, etc.).

Using ASV valves it is possible to optimize pump head while independent pressure zones allow to keep authority of terminal unit’s valve high.

ASV balancing valves are designed to guarantee high quality of the automatic balancing by:

-a pressure released cone,

-an adapted membrane for every valve dimension which provide constant quality performance for all sizes,

-spring with linear characteristic that makes setting required Δp easy.

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Data sheet

Automatic balancing valves ASV

Description / Application ASV valves DN 50 is supplied with external (continuous) thread only. Threaded or weld tail pieces can be

supplied as an accessory. Dimensions DN 65-100 are supplied as f langed valves.

ASV balancing valves have integrated service functions such as shut-off.

ASV-PV can be equipped with plug for f low measuring. In that case measuring

plugs need to be ordered separately and

mounted on the valve as follows:

•on top of drain connection (DN 50),

•on the f lange connection before the valve is filled with water (DN 65-100).

ASV-PV valves are to be mounted in return pipe, in combination with partner valves mounted

in f low pipe. As a partner valve MSV-F2 is recommended.

There are two basic configurations when using ASV partner valves (MSV-F2):

•partner valve outside the control loop (Fig. 1). Recommended configuration: it results in best performance since whole controlled pressure range is available to the riser. Flow limitation is done on each terminal unit in the riser.

MSV-F2, by connecting impulse tube to downflow test plug.

•partner valve inside control loop (Fig. 2). Offers flow limitation on the riser however part of the controlled pressure range is used

by pressure drop on partner valve (∆pi). It is recommended when flow limitation on each terminal units is not possible.

MSV-F2, by connecting impulse tube to up-flow test plug.

Fig. 1

Setting of ASV-PV = priser

Fig. 2

Setting of ASV-PV = ∆priser + ∆pi

Fig. 3 ASV in riser / typical heating application (general example)

ASV valves are to be used in heating systems to control the differential pressure in risers. To

limit the f low for every radiator, the thermostatic radiator valve with pre-setting facilities (feature) is used together with a constant pressure provided by the ASV, thus providing balanced heat distribution.

Controlling differential pressure over the riser means also that the valve authority over the thermostatic radiator valves is high – which allows an accurate and stable temperature control and saves energy.

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Data sheet

Automatic balancing valves ASV

Description / Application

(continuous)

Fig. 4 ASV in manifold for f loor heating system

ASV valves are to be used in f loor heating systems. To limit the f low for every loop valves with an integrated f low limiting or presetting function should be used together with a constant pressure provided by an ASV-PV valve.

ASV-PV valves can control the differential pressure in several ranges if different pressure is needed.

Fig. 5

ASV with fan coil

The ASV valves are to be used in systems with fan coils, induction devices and air-heaters to secure an automatic hydronic balance by the means of differential pressure control in branches or at every coil.

Fig. 6 ASV with air handling unit

The ASV valves are to be used in air handling units to secure an automatic hydronic balance by the means of differential pressure control at every unit.

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Data sheet

Automatic balancing valves ASV

Sizing

Thread	Flange
Q min ≤ Q ≤ Q 10 kPa

Fig. 7 Column diagram for sizing ASV valves at ∆pv = 10 kPa. For different ∆pv values use diagram A in Appendix.

We recommend to size the diameter of

ASV-PV valves by using Fig 7. Maximum f low rates are based on 10 kPa differential pressure over the valve which allows effcient pumping and saves energy.

After ASV-PV valves have been sized the same dimension of partner valve MSV-F2 valve should be selected.

Example:

Given:

Pipe f low 3000 l/h, pipes DN 50

Solution:

Horizontal line intersects the column for the valve DN 50 which can therefore be selected as required size.

For detailed sizing see examples on pages 9. For different ∆pv (differential pressure over the valve) see diagrams in Appendix A.

Connection between valves size and pipe size

Kv values per particular dimension were designed to cover f low range according to VDI 2073 with water velocity of up 0.8 m/s, at differential pressure of 10 kPa over the valve. As long as the water velocity in the pipe is between 0.3 and 0.8 m/s dimension of the valve should be equal to pipe dimension.

This rule is derived out of the fact that Kv values per particular dimension were designed to cover f low range according to VDI 2073 at differential pressure of 10 kPa over the valve.

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Data sheet

Automatic balancing valves ASV

Ordering	ASV-PV balancing valve, inclusive in the box:
	2.5 m impulse tube (G 1/16 A) drain connection (G 3/4 A) and adapter 003L8151
	Type	DN	kVS	Connection	∆p setting range	Code No.
			(m3/h)		(kPa)
					5-25	003Z0611
				External	20-40	003Z0621
		50	20	thread G 2 1/2
					35-75	003Z0631
				ISO 228/1
					60-100	003Z0641
	ASV-PV balancing valve, inclusive in the box:
	2.5 m impulse tube (G 1/16 A), adapter ASV large 003Z0691 and 003L8151
	Type	DN	kVS	Connection	∆p setting range	Code No.
			(m3/h)		(kPa)
		65	48			003Z0623
		80	63		20-40	003Z0624
		100	76.0			003Z0625
		65	48	Flange		003Z0633
		80	63		35-75	003Z0634
				EN 1092-2
		100	76.0			003Z0635
		65	48			003Z0643
		80	63		60-100	003Z0644
		100	76.0			003Z0645

MSV-F2 Partner valve with shut-off, flowlimitation and test plugs. 1)

	Type	DN	kVS	TMAX.	DN20	Code No.
			(m3/h)	(°C)	(bar)
		15	3.1			003Z1085
		20	6.3			003Z1086
		25	9.0			003Z1087
		32	15.5			003Z1088
		40	32.3	130	16	003Z1089
		50	53.8			003Z1061
		65	93.4			003Z1062
		80	122.3			003Z1063
		100	200.0			003Z1064

1) For more information see MSV-F2 datasheeet

Accessories and spare parts

	Description	Comments/connection	Code No.
	Shut off knob for MSV-F2	DN 50	003Z0179
		DN 65-100	003Z0180
	Differential pressure measuring	For drain connection	003L8143
	connector
		1.5 m	003L8152
	Impulse tube, with O-rings	2.5 m	003Z0690
		5 m	003L8153
	Plastic impulse tube with connectors and	For making set of 10 pieces 4)	003Z0689
	adapters
	Adapter large ASV 1)	G ¼-R ¼; G 1/16	003Z0691
	Plug for connecting impulse tube 2)	G 1⁄16-R ¼	003L8151
	O-ring for impulse tube 3)	2.90 × 1.78	003L8175

1)Recommended for use with MSV-F2, connected to measuring hole, it allows connection of impulse tube from ASV while retaining measurement functionality.

2)Recommended for use with MSV-F2, connected to measuring hole. Can also be used for connecting impulse tube directly on the pipe.

3)Set of 10 pieces.

4)Total 15 meter of impulse tube

Fitting

For valves with external thread Danfoss offers threaded or welded tailpieces as accessory.

Materials

	Nut	brass
Tailpiece welding		steel
Tailpiece threaded		brass
Type	Comment	to pipe to valve	Code No.
	Tailpiece	DN 50 (2 ¼˝)	003Z0274
	threaded	R2	003Z0278
	(1 pcs.)	DN 50 (2 ½˝)
	Tailpiece	DN 50 (2 ¼˝)	003Z0272
	welding	DN 50	003Z0276
	(1 pcs.)	DN 50 (2 ½˝)

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