09-2005 DKCFN.PD.040.N4.02
521B0605
Nessie® is a trademark of Danfoss A/S
Data sheet
Nessie®
Directional Control Valve type VDH 30EC 4/3
For Cetop 3 fl ange mounting (ISO 4401) and inline mounting
Directional valves are used to control the direction
The valves are designed for tap water, i.e. without
additives. (EU-Directive 98/83/EC).
The directional valves are pilot operated On/Off
seat valves electrically activated by 4 coils.
The valves are designed according to the seat
valve principle where each individual seat valve is
controlled by its own pilot stage.
This valve type contains 4 seat valves altogether:
two inlet valves and two outlet valves. As each
seat valve is individually controlled by its own
pilot, this design off ers many
diff erent valve confi gurations to the end user.
Applications
Function
Advantages
Variants
Filtration
• Installable on all Cetop 3 blocks and inline
blocks
• Corrosion resistant surfaces
• Easy-to-clean surfaces
• The seat valve design ensures minimum leak-
age
• High degree of enclosure, IP67
• Many valve confi gurations available
The valve housing comes in standard version in
stainless steel AISI 304 (W. No. 1.4301) or AISI 316
(W. No. 1.4401).
The valve is available as a Normally Closed valve
(NC) or in a combination of Normally Open (NO)
and Normally Closed (NC).
The water supply must be fi ltered through a
10 µm abs.,
β
10
-value > 5000 fi lter.
For further fi lter details, please contact the
Danfoss Sales Organization.
2 DKCFN.PD.040.N4.02
521B0605
Data sheet Nessie® directional control valve type VDH 30EC 4/3
Technical data
Temperature
Antifreeze Protection
Code numbers
If a system requires antifreeze protection, Danfoss
recommends Dowcall N or Chillsafe mono propyl-
ene glycol from the Dow Chemical Company
and Arco Chemical Company, respectively. Both
antifreezes are biologically degradable and must
be used together with
demineralized
water.
demineralized water. demineralized
Mixing ratio must be:
• min. 30% antifreeze and 70% demine-
ralized water providing frost protection to
–13°C and preventing biofi lm in the system.
• max. 50% antifreeze and 50% demine-
ralized water due to increased viscosity,
providing frost protection to –30°C.
Max. pressure port P, A and B *)
140 bar
Return pressure, port T (T ≤ A, B pressure) *) 140 bar
Min. inlet pressure 5 bar
Max fl ow 30 l/min
Min. fl ow 1 l/min
Pressure loss at 5 / 15 / 30 l/min. (P
→
A + B
→
T) 5 / 8 /25 bar
Opening time when changing direction **) 110 ms
Closing time when changing direction **) 130 ms
Leakage, port P
→
A, B, T 0 ml/min
Leakage, port A, B
→
T 0 ml/min
Leakage, port, A, B
→
P (inlet pressure port P = 0 bar) max 5 ml/min
Leakage, port A, B
→
P (inlet pressure port P = pressure port A, B) 0 ml/min
Service life 7 million activations
Degree of enclosure IP 67
*) The pressure in each of the ports P, A and B must always be higher than the pressure in port T
**) No electrical delay required when changing direction
140 bar
Return pressure, port T (T ≤ A, B pressure) *) 140 bar
Min. inlet pressure 5 bar
Max fl ow 30 l/min
Min. fl ow 1 l/min
T) 5 / 8 /25 bar
Opening time when changing direction **) 110 ms
Closing time when changing direction **) 130 ms
A, B, T 0 ml/min
T 0 ml/min
P (inlet pressure port P = 0 bar) max 5 ml/min
P (inlet pressure port P = pressure port A, B) 0 ml/min
Service life 7 million activations
Degree of enclosure IP 67
Storage temperature:
• -40°C to +70°C – provided that the valve is
drained of fl uid and stored ”plugged”
Operation on (clean) water:
• Fluid temperature and ambient temperature:
+3°C to +50°C
Operation on water containing antifreeze:
• Fluid temperature and ambient temperature:
-30°C 1) to +50°C
1) please see paragraph on antifreeze protection
Valves (without coils) Function symbol
Weight Code
kg number
Valves (without coils) Function symbol
kg number
Valves (without coils) Function symbol
VDH 30 EC - NC
3.8 180L0046
stainless steel, AISI 304
VDH 30 EC - NC
3,8 180L0047
stainless steel, AISI 316
VDH 30 EC - 2xNC +2xNO
3,8 180L0050
stainless steel, AISI 304
Electrical: 12 V d.c., 24 V d.c., 24 V a.c., 110 V a.c. , 240 V a.c.
Activation of valve Power consumption: 18 W (d.c.), 10 W (a.c.) per coil
Manual with permanent magnet
Valves (without coils) Function symbol
kg number
Valves (without coils) Function symbol
kg number
Valves (without coils) Function symbol
VDH 30 EC - NC
VDH 30 EC - NC
VDH 30 EC - 2xNC +2xNO
Electrical: 12 V d.c., 24 V d.c., 24 V a.c., 110 V a.c. , 240 V a.c.
Activation of valve Power consumption: 18 W (d.c.), 10 W (a.c.) per coil
Manual with permanent magnet
Weight Code
kg number
Weight Code
kg number
3.8 180L0046
3,8 180L0047
3,8 180L0050
DKCFN.PD.040.N4.02
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Data sheet Nessie® directional control valve type VDH 30EC 4/3
Cetop 3 blocks and cover plate
Weight
Code
kg number
Cetop 3 blocks and cover plate
kg number
Cetop 3 blocks and cover plate
Inline block for 1 valve 0.8 180L0060
Block for 1 valve 2.4 180L0081
Block for 2 valves 4.4 180L0082
Block for 3 valves 7.3 180L0083
Block for 4 valves 9.6 180L0084
Block for 5 valves 12.1 180L0085
Cover plate*
Cover plate*
)
(f
or covering-up non-used valve outlets on block)
or covering-up non-used valve outlets on block)
0.1 180L0079
*) Supplied with screws and O-rings
Weight
kg number
Inline block for 1 valve 0.8 180L0060
Block for 1 valve 2.4 180L0081
Block for 2 valves 4.4 180L0082
Block for 3 valves 7.3 180L0083
Block for 4 valves 9.6 180L0084
Block for 5 valves 12.1 180L0085
0.1 180L0079
kg number
Inline block for 1 valve 0.8 180L0060
Block for 1 valve 2.4 180L0081
Block for 2 valves 4.4 180L0082
Block for 3 valves 7.3 180L0083
Block for 4 valves 9.6 180L0084
Block for 5 valves 12.1 180L0085
0.1 180L0079
Code numbers
(continued)
Pressure losses at
diff erent fl ows
The valves are supplied with screws and O-rings,
but without coils.
Coil
Coils (clip-on)
(NC + NO)
24 V / 50 Hz /10 W
018F7920
220 V / 50 Hz /10 W
018F7921
240 V / 50 Hz /10 W
018F7924
24 V / 60 Hz /10 W
018F7922
220 V / 60 Hz /10 W
018F7925
240 V / 60 Hz /10 W
018F7926
110 V / 50/60 Hz /10 W
018F7923
12 V d.c. / 18 W
018F7913
24 V d.c. / 18 W
018F7914
For other voltages, please contact Danfoss Sales Organisation for Water Hydraulics.
*
)
Requires special blocks, please contact Danfoss Sales Organisation for Water Hydraulics.
4 DKCFN.PD.040.N4.02
521B0605
Data sheet Nessie® directional control valve type VDH 30EC 4/3
Available valve
confi gurations
The table below shows the possible valve
confi gurations, depending on which coils are
activated.
For VDH 30EC 4/3 NC
For VDH 30EC 4/3 NC
Diagram showing fl ow routes through the valve,
port lettering and coil numbers.
For VDH 30EC 4/3 NC + NO
For VDH 30EC 4/3 NC + NO
DKCFN.PD.040.N4.02
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Data sheet Nessie® directional control valve type VDH 30EC 4/3
Cross-section of valve
Dimensions (mm)
VDH 30EC 4/3
1. Armature
2. O-ring
3. Orifi ce
4. O-ring
5. O-ring
6. Plug
7. Spring
8. Poppet
9. Orifi ce insert
10. Screw
11. O-ring
6 DKCFN.PD.040.N4.02
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Data sheet Nessie® directional control valve type VDH 30EC 4/3
Dimensions (mm)
Inline block for 1 valve
Dimensions (mm)
Cetop blocks
P and T ports:
G ½, 15,5 mm deep
A and B ports:
G
3
/
8
, 13 mm deep
DKCFN.PD.040.N4.02
521B0605
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Data sheet Nessie® directional control valve type VDH 30EC 4/3
Code numbers
Mounting of valve on cetop
block
Mounting of coils on valve
The valve is designed to be mounted on a block
with CETOP 3-port connection. Four stainless
steel screws and four O-rings are supplied with
the valve for mounting. Remember to smear/
spray the threads on the screws with Molykote®
D pasta from Dow Corning, or Klüber UH1 84-201
from Klüber lubrication, before mounting the
valve.
Coil on valves with short armature tubes (NC and
NO valves)
1. Place the o-ring on the armature tube.
2. The coil is clicked on by means of a light pres-
sure by hand – without using tools.
Spare parts
Code number
Poppet kit (position 8)
180L5005
Armature kit, NC (pos. 1)
180L5002
Armature kit, NO (pos. 1)
180L5003
O-ring for mounting on block
Dimensions
Code number
NBR, 1 pc. (pos. 11)
9.25
×
1.78
633B1243
Assembly screw
Tightening torque
Code number
M5
×
40 ISO 4762 A4, 1 pc (pos. 10)
7 Nm
681X0162
Tools
Application
Code number
Special tool for orifi ce insert
Mounting/dismounting of orifi ce
Orifi ce insert in valve housing:
12 Nm ±2 Nm
Armature to be screwed into the valve housing:
60 Nm ±2 Nm
180Z0034
Spool tool included in 180L5005
Mounting of spool
Permanent magnet
For manual activation of valve
180Z0212
8 DKCFN.PD.040.N4.02
521B0605
Produced by Danfoss Industri Service - Advertising 05.09 LN/Bi.pj
Data sheet Nessie® directional control valve type VDH 30EC 4/3
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to
products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed.
All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
DK-6430 Nordborg
Denmark
Dismounting