Danfoss VFS 2 Arkusz danych - Strona 2

Przeglądaj online lub pobierz pdf Arkusz danych dla Jednostka sterująca Danfoss VFS 2. Danfoss VFS 2 8 stron. Seated valve for steam pn25, 2-way valve, flange

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