Danfoss VG, VGF Data sheet
Data sheet
2 - way valve (NO), pressure relieved (PN 25)
VG - external thread
VGF - ange
Description
VG
VGF
VG and VGF are pressure relieved 2-way normally
open (NO) valves, designed to be combined with:
- AVT thermostatic actuators
- STM safety temperature monitors
- STL safety temperature limiters
In combination with AVT thermostatic actuators,
valves can be used primarily:
• for domestic hot water (DHW) production
- Hot water tanks
- Storage charge systems
- Instantaneous domestic hot water
production
• and in mixing loops and room heating
systems as well.
Main data:
• DN 15-50
• kVS 0,4-25 m3/h
• PN 25
• Temperature:
- Circ. water / glycolic water up to 30 %:
2 ... 150 °C
• Connections:
- Ext. thread (weld-on, thread and ange
tailpieces)
- Flange
• Flow and return mounting
Ordering
Example:
Valve DN 15; kVS 1,6; PN 25;
T
150 °C; ext. thread
max
- 1× VG DN 15 valve
Code No: 065B0772
Option:
- 1× Weld-on tailpieces
Code No: 003H69 0 8
DEN-SMT/SI
VG, VGF valve
Picture
VD.HD.U4.02 © Danfoss 09/2015
DN k
(mm) (m3/h)
15
20 6,3 G 1 A 065 B0775
25 8,0 G 1¼ A 065B0776
32 12, 5 G 1¾ A 065B0777
40 16 G 2 A 065B0778
50 20 G 2½ A 065B0779
15 4,0
20 6,3 065B0781
25 8,0 065B0782
32 12, 5 065B0783
40 20 065B0784
50 25 065B0785
VS
0,4
1,0 065B0771
1,6 065B0772
2,5 065B0773
4,0 06 5B07 74
Cylindrical external thread acc. to
Connection Code No.
065B0770
G ¾ A
ISO 228/1
065B0780
Flanges PN 25, acc. to EN 1092-2
1
Data sheet 2- way valve VG, VGF, pressure relieved (PN 25)
Ordering (continuous)
Accessories
Picture Type designation DN Connection Code No.
15
20 003H6909
Weld-on tailpieces
25 00 3H6910
32 0 03 H69 11
-
40 065B2006
50 065B2007
15
R ½ 003H6902
20 R ¾ 003H6903
25 R 1 003H6904
External thread tailpieces
Conical ex t. thread acc. to EN
32 R 1¼ 003H6905
10226 -1
40 R 1½ 065B2004
50 R 2 065B2005
15
Flange tailpieces
20 003H 6916
Flanges PN 25, acc. to EN 1092-2
25 0 03H6 917
Service kits
Picture Type designation DN (mm) kVS (m3/h) Code N o.
0,4 003H6869
1,0 003H6 870
15
Valve insert
20 6,3 00 3H6874
25 8,0 003H 6875
32 / 40 / 50 12 5 / 16 / 20 / 25 003H68 76
1,6 003H 6871
2,5 003H6872
4,0 003H6873
003H6908
003H6915
Technical data
Nominal diameter DN 15 20 25 32 40 50
k
value m3/h 0,4 1, 0 1,6 2,5 4,0 6,3 8 12, 5 16/2 0 1)20/25
VS
Stroke 3 5 10
Control ratio > 1:50
Control characteristic linear
Cavitation factor z ≥ 0,6 ≥ 0,55 ≥ 0,5
Leakage acc. to standard IEC 534 % of k
Nominal pressure PN 25
Max. dierential pressure bar 20 16
Medium Circulation water / glycolic water up to 30 %
Medium pH Min. 7, max. 10
Medium temperature °C 2 … 150
valve
Connections
tailpieces
Materials
Valve body
Valve seat Stainless steel, mat. No. 1.4571
Valve cone Dezincing free brass CuZn36Pb2As
Sealing EPDM
Pressure relieve system Piston
1)
Flange valve bod y
thread Red bronze CuSn5ZnPb (Rg5)
ange - Ductile iron EN- GJS-400 -18-LT (GGG 40,3)
VS
≤ 0,02 ≤ 0,05
External thread
- Flange
Weld-on and external thread
Flange -
Ductile iron
EN-GJS-4 00-18-LT (GGG
40, 3)
1)
2
VD.HD.U4.02 © Danfoss 09/2015
DEN-SMT/SI
Data sheet 2- way valve VG, VGF, pressure relieved (PN 25)
Application principles
Pressure temperature
diagram
Valves can be installed in any position.Installation positions
Note!
Installation positions for AVT thermostatic actuators, STM
safety temperature monitors and STL safety temperature
limiters have to be obser ved as well. Please see relevant
Data Sheet.
EN-GJS-400 -18-LT (GGG 40,3) PN 25
CuSn5ZnPb (Rg5) PN 25
DEN-SMT/SI
working area
Maximum allowed operating pressure as a function of medium temperature (according to EN 1092-2 and EN 1092-3).
VD.HD.U4.02 © Danfoss 09/2015
3
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