DMB and DCB are for use in liquid lines on heat pumps.
Hermetic bi-owlter driers, types DMB and
DCB are for use in liquid lines on heat pumps.
Hermetic bi-owlter driers have built-in check
valves which ensure that refrigerant liquid
always ows through the lter driers from the
outer side of the lter core towards the center.
Thus all dirt particles are retained irrespective
of ow direction.
DMB and DCB lter driers ensure fast and
eective adsorption of moisture as well as
organic and inorganic acids.
When building heat pump systems, the use of
bi-owlters can, depending on the type of
system, save up to ten solder connections. This
reduces production costs and the number of
potential leakage points.
Available with are and solder (cu-plated steel)
connections.
For other connections please contact your
Danfoss Sales Representative.
AI192386436430en-000401en-000401
Filter
Solid core surface
Solid core volume
Filter drier volume
(shell volume)
Filter drier volume
(net volume)
[cm
2
]
[cm
3
]
[l]
[l]
DMB/DCB 087380
0.10
0.088
DMB/DCB 16
100
145
0.30
0.234
DMB/DCB 30
250
365
0.49
0.322
Hermetic bi-owlter drier, Type DMB and DCB
Features
The Core type DMB
• 100% 3Å Molecular Sieve core
• High drying capacity minimizing the risk of acid formation (hydrolysis)
• Recommended for use with HFO, HC, HFC and HCFC refrigerants
• Will not deplete oil additives
The Core type DCB
• 80% 3Å Molecular Sieve with 20% activated alumina
• Perfect core blend for systems that operate at high condensing temperatures and require high drying capacity
• Recommended for use with HFO, HC, HFC and HCFC refrigerants
The Shell
• PED approved for PS 46 bar
• Available with are and solder (cu-plated steel) connections
• Optimum ow characteristics and dirt retention
• The check valves are not sensitive to dirt and give minimum restriction, irrespective of ow direction
Table 4: Type selection is made considering the application
(1)
(1)
Only solder versions (cu-plated / pure copper) and connection sizes below 25 mm are approved for ammable refrigerants now
Only solder versions (cu-plated / pure copper) and connection sizes below 25 mm are approved for ammable refrigerants now
(2)
(2)
DCB Hermetic lter driers contain activated alumina, which is a polar material used for acid adsorption. Many oil additives are also polar
DCB Hermetic lter driers contain activated alumina, which is a polar material used for acid adsorption. Many oil additives are also polar
substances and can be adsorbed by the activated alumina, rendering them useless, and reducing the drier’s acid capacity, though this is not
substances and can be adsorbed by the activated alumina, rendering them useless, and reducing the drier’s acid capacity, though this is not
harmful to the system
harmful to the system
Selection example
Select the appropriate type (DMB or DCB) based on refrigerant and oil type. Then select the drier size based on the
adsorption and liquid capacity required.
• Amount of charge: 15 kg R134a at tL = 24 °C To dry 15 kg R134a at 24 °C from 1050 to 60 ppm moisture, a DMB 16
is necessary
• Cooling capacity: Qe = 25 kW, To obtain a mass ow corresponding to 25 kW cooling capacity with a DMB 16 lter
drier, a 1⁄2 inch connection must be chosen. Larger connections can be chosen in accordance with the liquid line
dimension
• Result DMB 164 or DMB 165 can be used
If the initial moisture content is very small or a planned change of the lter drier is considered, a smaller lter drier
size can be chosen.
Table 9: Type DMB Solder (cu-plated steel connectors)
Table 10: Type DCB Solder (cu-plated steel connectors)
Certicates, declarations, and approvals
The list contains all certicates, declarations, and approvals for this product type. Individual code number may have
some or all of these approvals, and certain local approvals may not appear on the list.
Some approvals may change over time. You can check the most current status at danfoss.com or contact your local
Danfoss representative if you have any questions.
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