Danfoss AVDO Data sheet [sl]
Data sheet Automatic bypass control AVDO
Application
Ordering
AVDO is a self-acting constant flow control
primarily used either to maintain minimum
flow rates through e.g. a low-capacity gas
boiler or to control the differential pressure in
- is dimensioned for pressure stage PN 10,
max. 120 °C
- DN 15 and DN 20
- operates without impulse tubes
a central heating system.
On delivery valve housing is fit onto AVDO
AVDO:
- opens on rising differential pressure
- has a setting range of 0.05 - 0.5 bar
with one of the following fittings: internal
socket thread, internal socket thread/nipple or
external thread for compression fittings.
Princip
Low-capacity gas boiler where maintenance of
a min. flow is required
Setting Connection
Type range Code no.
AVDO 15 R
AVDO 20 0,05 - 0,5 R
AVDO 25 R
AVDO 15 R
AVDO 20 0,05 - 0,5 R
AVDO 25 R
AVDO 15 G 3/4 A
AVDO 20 0,05 - 0,5 G 1 A
AVDO 25 G 1 1/4 A
AVDO 15 R
AVDO 20 0,05 - 0,5 R
AVDO 25 R
1)
According to ISO 7/1
2)
According to ISO 228/1
bar Inlet Outlet
1)
1/2
p
1)
3/4
p
1)
1
p
1)
1/2
p
1)
3/4
p
1)
1
p
2)
2)
2)
1)
1/2
p
1)
3/4
p
1)
1
p
Differential pressure control
1)
Rp 1/2
Rp 3/4
1)
Rp 1
1)
R 1/2
1)
R 3/4
1)
R 1
G 3/4 A
G 1 A
2)
003L6002
1)
003L6007
003L6012
003L6003
003L6008
003L6013
2)
003L6020
003L6025
G 1 1/4 A 2)003L6030
1)
R 1/2
R 3/4
R 1
1)
1)
003L6018
003L6023
003L6028
Accessories (supplied in boxes of 10)
Copper tube fittings Code no.
AVDO 15
AVDO 20
AVDO 25 Æ 28 x 1 13U0140
Æ 16 x 1 13U0131
Æ 18 x 1 13U0132
Æ 18 x 1 13U0134
Æ 22 x 1 13U0135
BC-HM VD.55.K6.02 © Danfoss 3/96 1
Data sheet Automatic bypass control AVDO
Technical data Setting range............................. 0.05 - 0.5 bar
Max. differential pressure..................... 0.5 bar
Operation pressure ...............................PN 10
Capacity
A = set opening pressure
Dp=Dp for valve
= Upper limit graph for recommended application area
with almost noiseless installation. Measurement
conditions according to ISO 3743.
Max. flow temperature .........................120 °C
Max. leakage at closed valve................. 50 l/h
AVDO 15
AVDO 20
Design
Installation
Materials of parts in contact with water
➀
Setting handle Pom-plast
➁ Base Ms 58
➂ Spring guide Polyphenylene sulphide
(PPS-plastics)
➃ Spring Stainless steel
➄ Valve cone Polyphenylene sulphide
(PPS-plastics)
➅ Valve body Ms 58, hot-pressed
➆ Setting pin Stainless steel
O-rings EPDM rubber
The valve body must be mounted with flow in
direction of the cast-in arrow.
AVDO 25
2 VD.55.K6.02 © Danfoss 3/96 BC-HM
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