Data sheet
VFS 2
2 | VD.HC.L3.02
© Danfoss | 2016.11
2-w
ay
Ca
pa
ci
ty
Stroke
DN 15-50:
EN-GJS-400-18-LT (GGG-40.3) PN 25
DN 65-100:
EN-GJS-400-15 (GGG-40) PN 25
Max. closing pressure
1)
and recommended Δp
2)
Valve
Actuator
DN
Stroke
(mm)
AMV(E) 25
[AMV(E) 25 SU/SD]
3)
AMV(E) 35
AMV(E) 55
AMV(E) 56
AMV(E) 85, 86
AMV(E) 65x
max. closing pressure
1)
(bar)
15
15
25 [22
3)
]
25
-
25
-
-
15 (kvs 4.0)
25 [16
3)
]
20
-
25
-
-
20
25 [10
3)
]
13
-
25
-
-
25
16 [5
3)
]
8
-
21
-
-
32
9 [2.5
3)
]
5
-
12
-
-
40
6 [2
3)
]
3
-
8
-
-
50
3 [0.5
3)
]
2
-
5
-
-
65
40
-
-
4.5
3
13
4.5
80
-
-
3
2
8
3
100
-
-
1.5
1
5
1.5
NOTE:
1)
Max. Δp is the physical limit of differential pressure the valve will close against. Max. Δp for stem application is 6 bar.
2)
The recommended Δp is based on the generation of noise, plug erosion etc.
Max. recommended Δp is 4 bar.
If max. closing pressure is smaller than 4 bar than the recommended Δp is the same as closing Δp.
3)
Values in parentheses [ ] are based on the force of the actuator AMV(E) 25 SU/SD only.
Technical data
Nominal diameter
DN
15
20
25
32
40
50
65
80
100
k
VS
value
m
3
/h
0.4
0.63
1.0
1.6
2.5
4.0
6.3
10
16
25
40
63
100
145
Stroke
mm
15
40
Control range
min. 30:1
min. 50:1
min. 100:1
Control characteristic
Logarithmic
Leakage acc. to standard IEC 534
max. 0.05 % of k
VS
Nominal pressure
PN
25
Medium
Circulation water/glycolic water up to 50 % /steam (max. ∆p = 6 bar)
Medium pH
Min. 7, max. 10
Medium temperature
°C
2 (–10
1)
) … 200
Connections
Flange ISO 7005-2
Materials
Body and cover
Ductile iron EN-GJS-400-18-LT (GGG 40.3)
Ductile iron
EN-GJS-400-15
(GGG 40)
Cone, seat and spindle
Stainless steel
Gland seal
Replaceable PTFE rings
1)
At temperatures from -10 °C … +2 °C use stem heater .
Pressure temperature diagram
Valve characteristics-logarithmic