Function
The purpose of filter driers is to keep the refrigeration circuit
clean of solid contaminants, water and acid. Contamination can
cause corrosion and ice building as well as malfunction of the
compressor.
Liquid filter driers are especially designed for a high water
capacity whereas suction line filter driers feature a high acid
and filtration capacity.
Property
of Desiccants
Molecular sieves
This kind of desiccant has a very good drying effect
independent of the oil content of the refrigerant. Molecular
sieve is a fast acting desiccant and will remove moisture even
when the water content of the refrigerant is low and when the
temperature of the liquid refrigerant is high.
Activated alumina
Activated alumina incorporate an excellent acid and filtration
capacity. By selecting a specific mixture of both desiccants
an
optimum effect can be achieved to cover the requirements of
all kinds of applications.
Flow
Capacity
Flow capacity refers to ARI-Standard 710-86 and is based on
a pressure drop of 14 kPa, +30°C liquid temperature and
-15°C evaporating temperature.
Recommended
Capacity
Recommended capacity applies to common installations with liquid
temperatures to +30°C and evaporating temperatures above
of -15°C. The next larger drier size should be selected
for installation with lower evaporating temperatures, excessive
pipe length, excessive refrigerant content or other. The next
smaller drier size can be selected for factory assembled units
and/or for higher evaporating temperatures.
Water
Capacity
The water capacity for R 22 refers to ARI 710-86 and is based
on a liquid temperature of 24/52°C and a equilibrium point
dryness (EPD) of 60 PPM water in refrigerant. The stated capacities
for R 134a are at 60 PPM, for R 404A at 50 PPM.
Filter Driers Series EK-Plus
Hermetic Design, for Liquid Refrigerants
Optimum blend of molecula sieve and activated
alumina
High water and acid capacity
Filtration down to 40
micron
Temperature range -45°C
to +65°C
Maximum operating pressure
3100 kPa
Filter Driers Series ADK-Plus
Hermetic Design, for Liquid Refrigerants
Optimum blend of molecularsieve and activated
alumina
