Product Overview

Data sheet AVDO
Automatic By-pass Valve
VD55K622 © Danfoss 04/10
Design
Installation
Setting
Capacity
2
Materials of parts in contact with water
1. Setting handle Pom-Plastic
2. Base Ms 58
3. Spring guide
Polyphenylene sulphide
(PPS-plastics)
4. Spring Stainless steel
5. Valve cone
Polyphenylene sulphide
(PPS-plastics)
6. Valve body Ms 58, forged
7. Setting pin Stainless steel
8. O-rings EPDM rubber
AVDO 20
AVDO 15
AVDO 25
A = set opening pressure
∆p = ∆p for valve
Upper limit graph for recommended
application area with almost noiseless
installation. Measurement conditions
according to ISO 3743.
The valve body must be mounted with fl ow in
the direction of the cast-in arrow.
The control is set by turning the adjustment
knob. AVDO has a setting scale on which the
opening pressure can be set according to the
table to the right. The diff erential pressures
stated for a given setting are indicative. The
scale gives the diff erential pressure across
the AVDO when it just begins to open.
0.1 - 1 = 1.45
0.2 - 2 = 2.90
0.3 - 3 = 4.35
0.4 - 4 = 5.8
0.5 - 5 = 7.25
bar mH
2
O psi