Data Sheet
Throttle valves
VOH 30 M, VOCH 30 M and VOCH 30 MC
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Data Sheet | Throttle valves VOH 30 M, VOCH 30 M and VOCH 30 MC
Application
Function
Advantages
Variants
Manually Variable Throttle Valve
Manually Variable Throttle Check
Valve
• VOH 30 M (inline mounted)
VOH 30 M regulates the ow in both directions.
The valves regulate ow and thus e.g. the speed
of an actuator (motor or cylinder).
The valves are designed for ordinary tap water
without additives of any kind, but are also suit-
The valves are designed to operate according to
the needle controlled valve principle.
• Accurate ow regulation
• Flow rates easy to set
The valve housing comes as standard in stainless
steel AISI 304 (W.nr. 1.4301). On request the valve
housing for VOCH 30 MC is available in stainless
• VOCH 30 M (inline mounted)
• VOCH 30 MC (cetop 3 block mounted)
VOCH 30 M and VOCH 30 MC regulate the ow
in one direction and allow for free passage in the
opposite direction via an integrated check valve.
able for applications operating on air, neutral
gases and oil compatible with the NBR O-ring
material used.
VOCH 30 MC is a double throttle check valve
working as an intermediate block to a cetop 3
standard, consisting of a block, VOCH 30 MC and
directional valve, type VDH 30EC4/3.
• Corrosion resistant surfaces,
mainly stainless steel
• Adjustment position secured with lock nut
steal AISI 316L (W.nr. 1.4401).
Please contact your Danfoss sales organization.
2 | © Danfoss | DCS (im) | 2020.02 AI318130630645en-001001 | 521B0802
Data Sheet | Throttle valves VOH 30 M, VOCH 30 M and VOCH 30 MC
Filtration
Temperature
Antifreeze Protection
Technical Data and
Code numbers
The water supplied to the valve must be ltered:
50 μm absolute lter is recommended.
Storage temperature:
• -40°C to +70°C – provided that the valve is
drained of uid and stored “plugged”
Operation on (clean) water:
• Fluid temperature and ambient temperature:
+2°C to +80°C
If a system requires antifreeze protection, Danfoss
recommends Dowcall N or Chillsafe mono propylene glycol from the Dow Chemical Company
and Arco Chemical Company, respectively. Both
antifreezes are biologically degradable and must
be used together with demineralized water.
Mixing ratio must be:
VOH 30 M VOCH 30 M VOCH 30 MC
For further information on lters, please contact
your Danfoss sales organization.
Operation on water containing antifreeze:
• Fluid temperature and ambient temperature:
-30°C 1) to +50°C
1) please see paragraph on antifreeze protection
• min. 30% antifreeze and 70% demineralized
water providing frost protection to –13°C.
• max. 50% antifreeze and 50% demineralized
water due to increased viscosity, providing frost
protection to –30°C.
Function symbol
Code number 180H0141 180H0140 180H0143
Max pressure cont. 140 bar 140 bar 140 bar
Max pressure drop across the valve 140 bar 140 bar 140 bar
Max. ow 30 l/min 30 l/min 30 l/min
Pressure loss at 30 l/min 15 bar 15 bar 23 bar
Pressure loss at 15 l/min 4 bar 4 bar 8 bar
Min. adjustable ow at 140 bar 3 l/min 3 l/min 3 l/min.
Max. leakage for closed valve at 140 bar 50 ml/min. 50 ml/min. 50 ml/min.
Pressure loss across check valve at 30 l/min – 4.5 bar 5 bar
Adjustment screw (from min. to max. ow) 7 ½ turn 7 ½ turn. 7 ½ turn
Port connection G ³⁄₈” G ³⁄₈” Cetop 3
Steel type AISI 304 AISI 304 AISI 304
O-ring material NBR NBR NBR
Weight 1,30 kg 1,30 kg 1,90 kg
© Danfoss | DCS (im) | 2020.02
AI318130630645en-001001 | 521B0802 | 3
Data Sheet | Throttle valves VOH 30 M, VOCH 30 M and VOCH 30 MC
Flowrate curves
(for water)
VOH 30 M
Pressure losses at varaious opening degrees
Primary ow direction Secundary ow direction
VOCH 30 M
Pressure losses at various opening degrees
VOCH 30 MC
Pressure losses at various opening degrees
N is the number of rotations of the adjusting screw.
At N = 0 the valve is fully closed (lower position).
VOCH 30 M and VOCH 30 MC
Pressures drop across the check valve as a function of the ow
4 | © Danfoss | DCS (im) | 2020.02 AI318130630645en-001001 | 521B0802
Data Sheet | Throttle valves VOH 30 M, VOCH 30 M and VOCH 30 MC
Mounting of inline valves
Mounting of valve on Cetop
block
Inline valves
Dimensions (mm)
VOH 30 M and VOCH 30 M
Inline valves are mounted in line in ow direction
(follow the arrow on the valve) and xed either
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
directly in the pipe connections or with bolts in
the xation holes on the valve.
the threads on the screws with Molykote® D pasta
from Dow Corning, or Klüber UH1 84-201 from
Klüber lubrication, before mounting the valve.
CETOP valves
Dimensions (mm)
VOCH 30 MC
Double throttle check valve
© Danfoss | DCS (im) | 2020.02
AI318130630645en-001001 | 521B0802 | 5
Danfoss A/S
High Pressure Pump
Nordborgvej 81
DK-6430 Nordobrg
Denmark
© Danfoss | DCS (im) | 2020.02
AI318130630645en-001001 | 521B0802 | 6
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