DEHYDRATORS AND FILTERS
91
DEHYDRATION OF REFRIGERANTS
Among contaminating agents causing
serious damages to refrigerating systems,
moisture plays a major role. Its presence,
even possible in the refrigerating system,
is due to many factors:
inadequate or insufficiently prolonged
vacuum before refrigerant charging;
oil used for topping up remained
exposed to air humidity;
refrigerant used for subsequent
additions contained in non dried
vessels;
sealing defects especially in systems
not designed for operation at low
temperatures.
High temperatures combined with
humidity give rise to complex phenomena
enhancing acid formation both in
lubricating oil and refrigerant.
Oil organic acids react with metal and
favor the formation of sludge, which are
viscous clots consisting of insoluble metal
salts and large molecules of polymerized
oil.
Sludge affects the lubrication of the
moving elements of the compressor, can
clog valves and filters and cause serious
damages.
Acids, especially hydrofluoric acid,
produced by the hydrolysis of the
fluorinated refrigerant (in compressors iron
and aluminum act as catalysts) are
particularly corrosive.
Acids etch metal surfaces with the
consequent formation of crystal salts,
which stick to surfaces and affect the total
heat exchange coefficient in the
condenser and in the evaporator.
In the sealed and semi-sealed groups,
these salts damage the windings of
electric motors as in these groups cold
gas cools windings through direct contact.
On the other hand, water solubility in
refrigerants in a liquid phase, is quite
reduced, especially at low temperatures.
As a consequence, when in the system
water exceeds the very low limits of
solubility admitted at low temperature,
excess water turns into ice, and blocks
expansion valves and capillaries either
partially or totally.
Consequently, refrigerating plants must be
equipped with a filter drier on the liquid
line and types available on the market are
essentially two: molecular sieve driers and
solid core driers.
92
In molecular sieve driers, with a charge
constituted by non-agglomerated
products, the dehydrating mass is pressed
in between two fine steel mesh disks, or
two filtering disks of various material, kept
in place by a spring.
In solid core driers, dehydrating and
deacidifying products with binders
constitute the block. Water adsorption
combines with the neutralization of acids
that may be present in the refrigerant, and
with a strong filtering action.
Castel have planned either its production
lines of hermetic driers on this second
solution that avoid any risk of abrasion of
the charge and consequently the making
of powder and permit to put the filter in
any position inside the refrigerating
system.
It is always advisable to install a moisture
indicator downstream the filter, which will
show the refrigerant moisture and,
consequently, the degree of efficiency of
the filter.
The dehydrating capacity of Castel drier is
relative to the charge of refrigerant and not
to the refrigeration potential of the plant.
As a matter of fact, for the same
refrigerant potential and for the same type
of refrigerant fluid, there can be different
refrigerant charges according to the type,
design and working conditions of the plant
as well as to the shutter degree.
The data shown in the following tables are
deduced from the test results of the
present Castel production.
It is important to note in the case of a high
oil level in the circuit (> 5%) the data
shown in the tables will be reduced
considerably.
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Approved by Underwriters Laboratories Inc.
SOLID CORE FILTER DRIERS WITH 100%
MOLECULAR SIEVES SERIES 43
Approved by Underwriters Laboratories Inc.
APPLICATIONS
The filters, shown in this chapter, are
classified Pressure vessels in the
sense of the Pressure Equipment
Directive 94/23/EC, Article 1, Section
2.1.1 and are subject of Article 3,
Section 1.1 of the same Directive.
They are designed for installation on
commercial refrigerating systems and
on civil and industrial conditioning
plants, which use refrigerant fluids
proper to the Group II (as defined in
Article 9, Section 2.2 of Directive
97/23/EC and referred to in Directive
67/548/EEC).
Filters series 42 and series 43 have
been developed for specific installations
on refrigerating systems using HFC
refrigerant fluids, particularly R134a,
R404A, R407C, R410A ed R507 mixed
with polyolester lubricants. In spite of
this, the new block may be successfully
used also in refrigerating systems using
the old CFC or HCFC refrigerant fluids,
mixed with mineral lubricants
The blocks in the filters series 42 are
molded from a blend of dehydrating
charge, 80% of 3 molecular sieves
and 20 % of activated alumina, and a
special binding agent in appropriate
proportions. The choice of blend,
molecular sieves activated alumina,
gives to the block a very high capacity
of acid adsorption also maintaining very
good dehydrating characteristics. The
presence of a controlled and defined
percentage of activated alumina, lower
than the maximum value recommended
by ASERCOM, keeps unchanged the
original concentration of additives in the
polyolester lubricant.
DEHYDRATORS AND FILTERS
ANTI-ACID SOLID CORE FILTER DRIERS WITH
MOLECULAR SIEVES AND ACTIVATED ALUMINA
SERIES 42
CONSTRUCTION
The filter is completely manufactured in
steel, either with nickel-plated Flare
threaded connections. The product
range also includes types with copper
plated solder connections, offering the
possibility to solder the copper pipe
inside the connections (ODS) or outside
the connections, using a copper sleeve
(ODM).
On specific customers request, Castel
is also able the supply them filters
series 42 and 43 with:
solder connections made of copper
tube EN 12735-1 Cu-DHP
ORFS (O-Ring Face Seal) threaded
connections according to SAE J 1453
Standard.
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93
The blocks in the filters series 43 are
molded from a blend of dehydrating
charge, totally made of 3 molecular
sieves, and a special binding agent in
appropriate proportions. The choice of
the 3 molecular sieves, as sole
dehydrating material, gives to the block
a superlative capacity of water
adsorption also maintaining quite good
deacidifying characteristics.
The manufacturing process gives a
considerable compacted ness and
stoutness to both the products so that
they are resistant to shocks and
abrasions.
The shape of the block is designed in
order to offer the maximum possible
surface area to the incoming fluid. The
internal cavity is also positioned in such
a way as to have a uniform wall
thickness. As a result, the fluid
encounters a constant strength at all
points, flows linearly through the block,
and ensures efficient dehydration and
minimum charge loss.
The block is chemically inert, not
deliquescent, does not react with
refrigerating fluids, and is capable of
blocking oil by-products dragged into
the circuit. Impurities accumulate in the
ring between the metal shell and the
block; this prevents filter clogging.
EXAMPLE OF SELECTION
System data:
Refrigerant: R407C
Condensing temperature: + 50 [C]
Weight of refrigerant: 34 [kg]
According to DIN 8949:2000, the adsorption
capacity of the drier is given by:
(1.050 50) x 34 / 1.000 = 34 g of H2O
where:
1.050 ppm. = moisture in the refrigerant
entering the filter according to DIN
8949:2000
50 ppm. = moisture in the refrigerant flowing
out the filter according to DIN 8949:2000
Comparing the absorption capacity required
with the values shown in table 2, drier
mod.4032 should be selected, with a water
absorption capacity of 47,5 g at 50 C.
If the dehydrating capacity of products is
expressed in water drops, it must be
remembered that:
1g H2O = 20 water drops
In this case and when a molecular sieve
drier is selected, the following result is
obtained:
34 x 20 = 680 water drops.
flow direction
If moisture exceeds the values specified in
DIN 8949:2000, a drier with a higher
adsorption capacity shall be selected.
Solid core dehydrator
1 Spring
2 Stainless steel mesh
3 Block
4 Felt
94
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Connections
High water capacity core (1)
Threaded
Connections
Solder
Connections
Block Nominal
International Filtering Volume
Reference Surface [cm3]
[cm2]
TS [C]
ODS
SAE
Flare
PS
[bar]
ODM
[in.]
[mm]
[in.]
[mm]
4303/2
032
1/4"
4303/2F (2)
1/4"
4303/2S
032S
1/4"
3/8"
4303/3
033
3/8"
4305/2
052
1/4"
47
50
4305/2F (2)
1/4"
4305/2S
052S
1/4"
3/8"
4305/3
053
3/8"
4305/3S
053S
3/8"
1/2"
4305/M10S
10
12
70
80
4308/2
082
1/4"
4308/2F (2)
1/4"
4308/2S
082S
1/4"
3/8"
4308/3
083
3/8"
4308/3F (2)
3/8"
4308/3S
083S
3/8"
1/2"
4308/M10S
10
12
4308/M12S
12
14
4308/4
084
1/2"
4308/4S
084S
1/2"
5/8"
16
4316/2
162
1/4"
103
130
4316/3
163
3/8"
4316/3F (2)
3/8"
4316/3S
163S
3/8"
1/2"
4316/M10S
10
12
4316/M12S
12
14
155
250
4316/4
164
1/2"
4316/4S
164S
1/2"
5/8"
16
4316/5
165
5/8"
4316/5S
165S
5/8"
16
3/4"
4330/3
303
3/8"
4330/3S
303S
3/8"
1/2"
4330/4
304
1/2"
4330/4S
304S
1/2"
5/8"
16
310
500
4330/5
305
5/8"
4330/5S
305S
5/8"
16
3/4"
4332/4
304
1/2"
4332/4S
304S
4332/5
305
1/2"
5/8"
16
5/8"
4332/5S
305S
5/8"
16
3/4"
4341/5
415
5/8"
4341/5S
415S
5/8"
16
3/4"
255
330
500
4341/6
416
3/4"
4341/6S
416S
3/4"
7/8"
4341/7S
417S
7/8"
1.1/8"
4375/4S
754S
1/2"
5/8"
16
4375/5S
755S
5/8"
16
3/4"
4375/6S
756S
3/4"
7/8"
4375/7S
757S
7/8"
1.1/8"
4375/9S
759S
1.1/8"
1.3/8"
35
660
670
1340
min.
max.
40
+80
42
(3)
Risk
Category
according
to PED
DEHYDRATORS AND FILTERS
TABLE 1: General Characteristics
Catalogue
Number
Art. 3.3
(1) 100% molecular sieves; (2) Male-female connections (Inlet female)
(3) PS = 400 psig in compliance with the UL approval
www.castel.it
95
TABLE 2: General Characteristics
Catalogue
Number
Connections
Anti-acid core (1)
Threaded
Connections
Solder
Connections
Block Nominal
International Filtering Volume
Reference Surface [cm3]
[cm2]
ODS
SAE
Flare
PS
[bar]
ODM
[in.]
[mm]
[in.]
[mm]
1/4"
1/4"
3/8"
4203/2
032
4203/2S
032S
4203/3
033
3/8"
4205/2
052
1/4"
4205/2S
052S
1/4"
3/8"
47
70
50
80
4205/3
053
3/8"
4205/3S
053S
3/8"
1/2"
4208/2
082
1/4"
4208/2S
082S
1/4"
3/8"
4208/3
083
3/8"
103
130
4208/3S
083S
3/8"
1/2"
4208/4
084
1/2"
4208/4S
084S
1/2"
5/8"
16
4216/2
162
1/4"
4216/3
163
3/8"
4216/3S
163S
3/8"
1/2"
155
250
4216/4
164
1/2"
4216/4S
164S
1/2"
5/8"
16
4216/5
165
5/8"
4216/5S
165S
5/8"
16
3/4"
4230/3
303
3/8"
4230/3S
303S
3/8"
1/2"
4230/4
304
1/2"
4230/4S
304S
1/2"
5/8"
16
310
500
4230/5
305
5/8"
4230/5S
305S
5/8"
16
3/4"
4232/4
304
1/2"
4232/4S
304S
1/2"
5/8"
16
4232/5
305
5/8"
4232/5S
305S
5/8"
16
3/4"
4241/5
415
5/8"
4241/5S
415S
4241/6
416
4241/6S
255
500
5/8"
16
3/4"
3/4"
416S
3/4"
7/8"
4241/7S
417S
7/8"
1.1/8"
4275/4S
754S
1/2"
5/8"
16
4275/5S
755S
5/8"
16
3/4"
4275/6S
756S
3/4"
7/8"
4275/7S
757S
7/8"
1.1/8"
4275/9S
759S
1.1/8"
1.3/8"
35
330
660
670
1340
(1) 80% molecular sieves + 20% activated alumina
(2) PS = 400 psig in compliance with the UL approval
96
TS [C]
www.castel.it
min.
max.
40
+80
42
(2)
Risk
Category
according
to PED
Art. 3.3
4308/M10S
R22
R404A
R507
R407C
R410A
8,2
8,9
5,8
8,8
9,0
15,4 16,6 10,8 16,5 16,7
3,8
4,2
3,4
3,7
4,4
4,0
4,5
3,6
3,9
3,5
3,0
3,9
2,7
2,9
3,8
3,2
4,2
2,9
3,2
7,3
6,7
7,4
6,0
6,5
7,8
7,2
8,0
6,4
7,0
6,3
5,3
6,9
4,8
5,2
6,8
5,7
7,4
5,2
5,6
9,1 11,8 10,0 13,0 9,0
9,8
19,4 21,0 13,7 20,8 21,2
6,9
7,5
4,9
7,4
7,5
8,5
9,2
6,0
9,1
9,3
18,0 19,5 12,7 19,3 19,6
12,7 11,6 13,0 10,4 11,3 13,7 12,5 13,9 11,2 12,2 10,9 9,3 12,0 8,4
22,8 24,7 16,1 24,5 24,8
6,9
7,5
4,9
7,4
7,5
19,7 21,3 13,9 21,1 21,4
24,6 26,6 17,3 26,4 26,7
4316/M12S
34,1 36,9 24,0 36,6 37,0
4316/4
28,2 30,5 19,9 30,3 30,6
4316/4S
34,1 36,9 24,0 36,6 37,0
4316/5
37,6 40,6 26,4 40,3 40,8
4316/5S
45,0 48,7 31,7 48,3 48,9
4330/3
21,7 23,4 15,3 23,2 23,5
4330/3S
27,1 29,3 19,0 29,0 29,4
4330/4
30,9 33,4 21,8 33,2 33,5
4330/4S
37,3 40,4 26,3 40,0 40,5
4330/5
38,8 41,9 27,3 41,6 41,9
4330/5S
46,6 50,4 32,8 50,0 50,6
4332/4
33,6 36,3 23,6 36,0 36,4
4332/4S
40,5 43,8 28,5 43,4 44,0
4332/5
39,9 43,1 28,1 42,8 43,0
4332/5S
48,2 52,1 33,9 51,7 52,3
4341/5
40,9 44,2 28,8 43,8 44,4
4341/5S
49,5 53,5 34,8 53,1 53,7
4341/6
R134a
7,2
29,0 31,3 20,4 31,0 31,4
4341/6S
R410A
7,1
24,0 25,9 16,9 25,7 26,0
4316/3S
R407C
4,7
4308/4S
4316/M10S
R404A
R507
R410A
7,2
29,0 31,3 20,4 31,0 31,4
4316/3
R22
R407C
6,7
4308/4
4316/3F
4,1
14,9 16,1 10,5 16,0 16,2
4308/M12S
4316/2
R134a
4308/3S
8,6
R410A
4308/3F
8,5
R407C
4308/3
5,6
R22
4308/2S
8,6
R404A
R507
4308/2
4308/2F
8,0
R134a
4305/3S
4305/M10S
7,0
R410A
4305/3
6,9
R407C
4305/2S
4,6
R22
4305/2F
7,0
Dehydratable Charge
at + 50 C
[kg refrigerant]
Water Capacity
at + 50 C (2) [g H2O]
R404A
R507
4305/2
6,5
Dehydratable Charge
at + 25 C
[kg refrigerant]
Water Capacity
at + 25 C (2) [g H2O]
R134a
4303/3
R404A
R507
4303/2S
R22
4303/2
4303/2F
Refrigerant Flow Capacity,
pressure drop
0,07 bar (1) [kW]
R134a
Catalogue
Number
DEHYDRATORS AND FILTERS
TABLE 3: Refrigerant Flow Capacity and Water Capacity
67,2 72,6 47,3 72,0 73,0
25,1 22,9 25,6 20,5 22,3 27,0 24,6 27,5 22,0 24,0 21,6 18,4 23,8 16,5 18,0 23,2 19,8 25,6 17,7 19,4
50,2 45,8 51,2 41,0 44,6 54,0 49,2 55,1 44,1 48,0 43,2 36,8 47,6 33,0 36,0 46,5 39,6 51,2 35,5 38,7
45,4 41,4 46,4 37,2 40,5 48,8 44,5 49,9 40,0 43,5 39,1 33,2 43,1 29,9 32,6 42,0 35,7 46,3 32,2 35,1
61,4 56,1 62,8 50,3 54,7 66,0 60,3 67,5 54,1 58,8 53,0 45,0 58,3 40,5 44,1 57,0 48,4 62,7 43,5 47,4
4341/7S
74,2 80,2 52,2 79,6 80,5
4375/4S
53,4 57,7 37,5 57,3 57,9
4375/5S
54,5 58,9 38,3 58,4 59,1
4375/6S
80,6 87,1 56,8 86,4 87,6 122,8 112,2 125,6 100,6 109,4 132,0 120,6 135,1 108,2 117,6 106,0 90,0 116,6 81,0 88,2 114,0 96,8 125,4 87,1 94,8
4375/7S
92,8 100,3 65,3 99,5 100,6
4375/9S
96,5 104,3 67,9 103,5 104,7
(1) (2) See caption on page 98.
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97
TABLE 4: Refrigerant Flow Capacity and Water Capacity
6,9
7,5
4,9
7,4
7,5
4208/2S
8,5
9,2
6,0
9,1
9,3
4208/3
18,0 19,5 12,7 19,3 19,6
4208/3S
22,8 24,7 16,1 24,5 24,8
4208/4
24,0 25,9 16,9 25,7 26,0
4208/4S
29,0 31,3 20,4 31,0 31,4
4216/2
6,9
4216/3
19,7 21,3 13,9 21,1 21,4
4216/3S
24,6 26,6 17,3 26,4 26,7
4216/4
7,5
4,9
7,4
3,2
3,6
2,9
3,1
3,8
3,4
3,9
3,1
3,4
3,0
2,6
3,3
2,3
2,5
3,3
2,8
3,6
2,5
2,7
6,2
5,7
6,3
5,1
5,5
6,7
6,1
6,8
5,5
6,0
5,4
4,5
5,9
4,1
4,5
5,8
4,9
6,3
4,4
4,8
7,7 10,0 8,5 11,0 7,7
8,3
10,8 9,9 11,0 8,8
9,6 11,6 10,6 11,9 9,5 10,3 9,3
7,9 10,2 7,1
28,2 30,5 19,9 30,3 30,6 21,3 19,5 21,8 17,4 19,0 22,9 20,9 23,4 18,7 20,4 18,4 15,6 20,2 14,0 15,3 19,7 16,8 21,8 15,1 16,5
34,1 36,9 24,0 36,6 37,0
4216/5
37,6 40,6 26,4 40,3 40,8
4216/5S
45,0 48,7 31,7 48,3 48,9
4230/3
21,7 23,4 15,3 23,2 23,5
4230/3S
27,1 29,3 19,0 29,0 29,4
4230/4
30,9 33,4 21,8 33,2 33,5
4230/4S
37,3 40,4 26,3 40,0 40,5
4230/5
38,8 41,9 27,3 41,6 41,9
4230/5S
46,6 50,4 32,8 50,0 50,6
4232/4
33,6 36,3 23,6 36,0 36,4
4232/4S
40,5 43,8 28,5 43,4 44,0
4232/5
39,9 43,1 28,1 42,8 43,0
4232/5S
48,2 52,1 33,9 51,7 52,3
4241/5
40,9 44,2 28,8 43,8 44,4
4241/5S
49,5 53,5 34,8 53,1 53,7
4241/6S
3,5
7,5
4216/4S
4241/6
R410A
19,4 21,0 13,7 20,8 21,2
4208/2
R407C
4205/3S
R404A
R507
15,4 16,6 10,8 16,5 16,7
R22
4205/3
R134a
9,0
R410A
7,2
8,8
R407C
7,1
5,8
R404A
R507
4,7
8,9
R22
7,2
8,2
R134a
6,7
R410A
4205/2
4205/2S
R407C
14,9 16,1 10,5 16,0 16,2
R22
8,6
4203/3
R404A
R507
7,0
8,5
R134a
6,9
5,6
R410A
4,6
8,6
R407C
R410A
7,0
8,0
R22
R407C
6,5
Dehydratable Charge
at + 50 C
[kg refrigerant]
Water Capacity
at + 50 C (2) [g H2O]
R404A
R507
R404A
R507
4203/2
4203/2S
Dehydratable Charge
at + 25 C
[kg refrigerant]
Water Capacity
at + 25 C (2) [g H2O]
R134a
R22
Refrigerant Flow Capacity,
pressure drop
0,07 bar (1) [kW]
R134a
Catalogue
Number
67,2 72,6 47,3 72,0 73,0
42,7 38,9 43,5 34,9 37,9 45,9 41,9 46,8 37,5 40,8 36,7 31,3 40,5 28,1 30,6 39,5 33,6 43,5 30,2 32,9
38,6 35,2 39,4 31,6 34,4 41,5 37,8 42,4 34,0 37,0 33,2 28,2 36,6 25,4 27,7 35,7 30,3 39,4 27,3 29,8
52,2 47,7 53,4 42,8 46,5 56,1 51,3 57,4 46,0 50,0 45,1 38,3 49,6 34,4 37,5 48,4 41,1 53,3 37,0 40,3
4241/7S
74,2 80,2 52,2 79,6 80,5
4275/4S
53,4 57,7 37,5 57,3 57,9
4275/5S
54,5 58,9 38,3 58,4 59,1
4275/6S
80,6 87,1 56,8 86,4 87,6 104,4 95,4 106,8 85,5 93,0 112,2 102,5 114,8 91,9 100,0 90,1 76,5 99,1 68,9 75,0 96,9 82,3 106,6 74,0 80,6
4275/7S
92,8 100,3 65,3 99,5 100,6
4275/9S
96,5 104,3 67,9 103,5 104,7
(1) Maximum values of the refrigerant flow capacity at which the drier can be used when fluid dehydration is not the a major problem,
provided that the original moisture is limited before the installation of the drier. The maximum refrigerant flow capacities are referred
to a total pressure drop of 0,07 bar, inlet and outlet connections included, (according to ARI STANDARD 710:86 - with condensing
temperature at +30 C and evaporating temperature at -15 C)
(2) Water capacity values with R22 are referred to the following conditions, fixed in ARI STANDARD 710:86:
- Liquid temperatures: 25 C and 50 C
- Equilibrium point dryness, EPD: 60 ppm
Water capacity values with the other refrigerant fluids are referred to the following conditions, fixed in DIN 8949:2000 Standard:
- Liquid temperatures: 25 C and 50 C
- Equilibrium point dryness, EPD: 50 ppm
98
www.castel.it
TABLE 5: Dimensions and Weights
Catalogue
Number
Dimensions
[mm]
ODS
SAE
Flare
[in.]
[mm]
Weight
[g]
4303/2
4203/2
1/4"
103
240
4303/2F
1/4"
92
230
4303/2S
4203/2S
1/4"
94
220
4303/3
4203/3
3/8"
111
235
4305/2
4205/2
1/4"
119
4305/2F
1/4"
109
4305/2S
4205/2S
1/4"
110
260
4305/3
4205/3
3/8"
127
295
4305/3S
4205/3S
3/8"
4305/M10S
10
112
260
275
4308/2
4208/2
1/4"
4308/2F
1/4"
4308/2S
4208/2S
1/4"
137
345
D
4308/3
4208/3
3/8"
154
395
male connections
4308/3F
3/8"
142
380
4308/3S
4208/3S
3/8"
4308/M10S
10
139
345
380
4308/M12S
12
146
380
4308/4
4208/4
1/2"
162
430
4308/4S
4208/4S
1/2"
146
380
4316/2
4216/2
1/4"
158
635
4316/3
4216/3
3/8"
166
690
4316/3F
3/8"
154
680
4316/3S
4216/3S
3/8"
4316/M10S
10
4316/M12S
12
158
640
4316/4
4216/4
1/2"
174
680
4316/4S
4216/4S
1/2"
158
640
4316/5
4216/5
5/8"
183
740
4316/5S
4216/5S
5/8"
16
166
640
151
73
620
630
4330/3
4230/3
3/8"
245
1380
4330/3S
4230/3S
3/8"
230
1240
4330/4
4230/4
1/2"
253
1360
4330/4S
4230/4S
1/2"
237
1280
4330/5
4230/5
5/8"
262
1480
4330/5S
4230/5S
5/8"
16
245
1370
4332/4
4232/4
1/2"
187
1300
4332/4S
4232/4S
1/2"
173
1200
4332/5
4232/5
5/8"
196
1320
4332/5S
4232/5S
5/8"
16
179
1250
4341/5
4241/5
5/8"
231
1580
4341/5S
4241/5S
5/8"
16
214
1470
4341/6
4241/6
3/4"
232
1640
4341/6S
4241/6S
3/4"
4341/7S
4241/7S
7/8"
4375/4S
4275/4S
1/2"
332
2540
4375/5S
4275/5S
5/8"
16
332
2640
4375/6S
4275/6S
3/4"
332
2820
4375/7S
4275/7S
7/8"
338
2900
4375/9S
4275/9S
1.1/8"
338
3050
91
219
135
D
male - female connections (female - in)
52
146
Connections
1560
1600
D
solder connections
www.castel.it
99
FILTER DRIERS WITH REPLACEABLE ANTI-ACID
SOLID CORE
Approved by Underwriters Laboratories
Inc.
Except filters 4423/17A, /21A, /25A and
4424/25A, /33A
APPLICATIONS
The filters, shown in this chapter, are
classified Pressure vessels in the sense of
the Pressure Equipment Directive 97/23/EC,
Article 1, Section 2.1.1 and are subject of
Article 3, Section 1.1 of the same Directive.
They are designed for installation on
commercial refrigerating systems and on
civil and industrial conditioning plants,
which use refrigerant fluids proper to the
Group II (as defined in Article 9, Section 2.2
of Directive 97/23/EC and referred to in
Directive 67/548/EEC).
OPERATION
In the case of filters with more than one
block, the passage of the fluid takes place
in parallel; as a result, the pressure drop
does not increase proportionately to the
number of blocks. A large ring between the
block and the inner surface of the filter
permits the accumulation of solid particles,
and prevents clogging. Before leaving the
100
filter, the refrigerant fluid must pass through
the mesh sieve on which blocks are
mounted. The danger that small particles of
dehydrating material being introduced into
the system is thus avoided. Furthermore, at
filter outlet, a plastic cup, the edge of which
closely adheres to the inner surface of the
filter, prevents dirt from reaching the outlet
connection during normal operation and
block change.
CONSTRUCTION
The filters type 4410 are manufactured in
steel, with the exception of the connections
which are made of EN 12735-1 Cu-DHP
copper tube.
The filters type 4420 are completely
manufactured in steel and solder
connection, are machined with a steel bar
EN 10025 S355JR.
The blocks series 4490 and 4491 has been
developed for specific installations on
refrigerating systems using HFC refrigerant
fluids, particularly R134a, R404A, R407C,
R410A ed R507 mixed with polyolester
lubricants. In spite of this, the new block
may be successfully used also in
refrigerating systems using the old CFC or
HCFC refrigerant fluids, mixed with mineral
lubricants.
The blocks 4490, type A and type B, and the
block 4491, type A, are molded from a blend
of dehydrating charge, totally made of 3
molecular sieves, and a special binding
agent in appropriate proportions. The choice
of the 3 molecular sieves, as sole
dehydrating material, gives to the block a
superlative capacity of water adsorption also
maintaining quite good deacidifying
characteristics.
The blocks 4490, type AA and type AB, and
the block 4491, type AA, are molded from a
blend of dehydrating charge, 80% of 3
molecular sieves and 20 % of activated
alumina, and a special binding agent in
appropriate proportions. The choice of
blend, molecular sieves activated alumina,
gives to the block a very high capacity of
acid adsorption also maintaining very good
dehydrating characteristics.
The presence of a controlled and defined
percentage of activated alumina, lower than
the maximum value recommended by
ASERCOM, keeps unchanged the original
concentration of additives in the polyolester
lubricant.
www.castel.it
Catalogue
Number
Core Cat.
Number
Number
of Cores
Core Filtering
Surface
[cm2]
Connections
Nominal
Volume
TS [C]
ODS
[in.]
[mm]
4411/5A
5/8"
16
4411/7A
7/8"
22
4411/9A
1.1/8"
1.3/8"
35
[cm3]
[cu.in]
4411/11A
420
800
48
4411/13A
1.5/8"
4411/M42A
42
4411/17A
2.1/8"
54
4412/7A
4490/A -
7/8"
22
4412/9A
4490/B -
1.1/8"
4412/11A
4490/AA
1.3/8"
35
4412/M42A
4490/AB
840
96
1600
[mm]
min.
45 (1)
I
42
54
1.3/8"
35
1.5/8"
4413/M42A
42
4414/13A
1.5/8"
42
4414/17A
2.1/8"
54
4423/17A
2.1/8"
54
60,3
2.5/8"
76,1
3.1/8"
80
88,9
3.1/8"
80
88,9
4.1/8"
114,3
4413/11A
4413/13A
4414/M42A
4423/21A
4423/25A
4424/25A
4424/33A
4491/A
1260
1680
1890
144
2400
192
3200
300
4800
4491/AA
4
2520
400
6400
max.
2.1/8"
4412/17A
Risk
Category
according
to PED
PS
[bar]
ODM
40
+80
DEHYDRATORS AND FILTERS
TABLE 1: General Characteristics
35 (1)
32
II
(1) PS = 470 psig in compliance with the UL approval
The manufacturing process of blocks series
4490 and 4491 gives a considerable
compacted ness and stoutness to both the
products so that they are resistant to
shocks and abrasions.
The blocks series 4490 have a volume of 48
cu.in., equivalent to approx. 800 cm3, and it
is used with type 4411, 4412, 4413 and
4414 filters.
The block series 4491 has a volume of 100
cu.in., equivalent to approx. 1600 cm3. and
it is used with type 4421, 4423 and 4424
filters.
The two blocks are shaped as a hollow
cylinder and their overall dimensions
correspond to those of other international
brands. Consequently they are
interchangeable. The hollow cylinder shape
offers a large surface area to the inflowing
fluid, which crosses the block in radial
sense. As a result, dehydration is highly
efficient with a minimum loss of charge.
Filters may be supplied also with an access
fitting kit G9150/R05, to be ordered
separately.
5
3
4
inlet
outlet
Sketch of filter with 2 blocks
1 Block
2 Mesh sieve serving as block support
3 Spring
4 Retainer cup
5 Access fitting 1/4 SAE flare (to order separately)
www.castel.it
101
TABLE 2A: Refrigerant Flow Capacity and Water Capacity (filters)
R410A
R134a
R22
R404A
R407C
R410A
R134a
R22
R404A
R407C
R410A
233 252 164 250 253
R407C
200 216 141 214 217
R404A
4411/9A
4411/11A
R22
90
R134a
89
R410A
R410A
59
R407C
R407C
90
146 158 103 156 159
R404A
R404A
83
4411/7A
Dehydratable Charge
at + 50 C
[kg refrigerant]
Water Capacity
at + 50 C (2) [g H2O]
R22
R22
4411/5A
Dehydratable Charge
at + 25 C
[kg refrigerant]
Water Capacity
at + 25 C (2) [g H2O]
R134a
R134a
Catalogue
Number
Refrigerant Flow Capacity,
pressure drop
0,07 bar (1) [kW]
84
77
86
69
75
90
83
92
74
81
72
61
80
56
60
77
66
86
60
65
4411/13A
4411/M42A
250 270 176 268 271
4411/17A
4412/7A
146 158 103 156 159
4412/9A
226 244 159 242 245
4412/11A
306 331 215 328 332 168 154 172 138 150 181 166 185 148 161 144 122 160 112 120 155 131 172 120 129
4412/M42A
4412/17A
4413/11A
4413/13A
4413/M42A
333 361 234 357 362
327 354 230 351 355
361 391 254 387 393
252 231 258 207 225 271 248 277 223 242 216 183 240 168 180 232 197 258 181 194
4414/13A
4414/M42A
426 460 300 456 462 336 308 344 276 300 361 331 370 297 323 288 244 320 224 240 310 262 344 241 258
4414/17A
4423/17A
447 483 315 479 485
4423/21A
492 532 346 527 534 504 462 516 414 450 542 497 555 445 484 432 366 480 336 360 465 394 516 361 387
4423/25A
670 725 472 719 728
4424/25A
737 797 519 791 800
4424/33A
1180 1276 830 1265 1281
672 616 688 552 600 723 662 740 594 645 576 488 640 448 480 619 525 688 482 516
TABLE 2B: Refrigerant Flow Capacity and Water Capacity (single block)
4491/A
4490/AA - 4490/AB
4491/AA
(3)
Dehydratable Charge
at + 50 C
[kg refrigerant]
R404A
R407C
R410A
R134a
R22
R404A
R407C
R410A
R134a
R22
R404A
R407C
R410A
R134a
R22
R404A
R407C
R410A
Water Capacity
at + 50 C (2) [g H2O]
R22
R410A
R407C
R404A
Dehydratable Charge
at + 25 C
[kg refrigerant]
Water Capacity
at + 25 C (2) [g H2O]
R134a
4490/A - 4490/B
R22
Refrigerant Flow Capacity,
pressure drop
0,07 bar (1) [kW]
R134a
Catalogue
Number
84
77
86
69
75
90
83
92
74
81
72
61
80
56
60
77
66
86
60
65
168 154 172 138 150 181 166 185 148 161 144 122 160 112 120 155 131
12
120 129
71
73
51
65
73
59
64
77
70
79
63
69
61
52
68
48
51
66
56
143 131 146 117 128 154 141 157 126 137 122 104 136
95
102 132 112 146 102 110
55
(1) Maximum values of the refrigerant flow capacity at which the drier can be used when fluid dehydration is not the a major problem,
provided that the original moisture is limited before the installation of the drier. The maximum refrigerant flow capacities are referred
to a total pressure drop of 0,07 bar, inlet and outlet connections included, (according to ARI STANDARD 710:86 - with condensing
temperature at + 30 C and evaporating temperature at -15 C)
(2) Water capacity values with R22 are referred to the following conditions, fixed in ARI STANDARD 710:86:
- Liquid temperatures: 25 C and 50 C
- Equilibrium point dryness, EPD: 60 ppm
Water capacity values with the other refrigerant fluids are referred to the following conditions, fixed in DIN 8949:2000 Standard:
- Liquid temperatures: 25 C and 50 C
- Equilibrium point dryness, EPD: 50 ppm
(3) Maximum values of the refrigerant flow capacity (according to ARI STANDARD 710:86) at which filter driers:
- series 4411, 4412, 4413, and 4414 can be used with blocks type 4490/AA and 4490/AB
- series 4423 and 4424 can be used with blocks type 4491/AA
when fluid dehydration is not the a major problem, are the same achieved with block type 4490/A, 4490/B and 4491/A.
102
www.castel.it
DEHYDRATORS AND FILTERS
TABLE 3: Dimensions and Weights
Connections
Catalogue
Number
Dimensions
[mm]
ODS
Weight
[g]
[in.]
[mm]
4411/5A
5/8"
16
4411/7A
7/8"
22
4411/9A
1.1/8"
4411/11A
1.3/8"
35
4411/13A
1.5/8"
4411/M42A
42
4411/17A
2.1/8"
54
4412/7A
7/8"
22
4412/9A
1.1/8"
[mm]
D1
121
D2
149
H1
H2
H3
148
235
90
154
241
96
159
246
171
258
113
162
249
103
5585
296
383
96
6880
185
101
5360
5405
5395
5464
5435
5410
4412/11A
1.3/8"
35
300
387
101
7015
4412/M42A
42
312
399
113
6985
4412/17A
2.1/8"
54
303
390
103
7136
4413/11A
1.3/8"
35
442
529
101
8510
4413/13A
1.5/8"
4413/M42A
42
454
541
4414/13A
1.5/8"
4414/M42A
42
4414/17A
2.1/8"
54
4423/17A
2.1/8"
54
60,3
4423/21A
2.5/8"
76,1
4423/25A
3.1/8"
80
88,9
4424/25A
3.1/8"
80
88,9
4424/33A
4.1/8"
114,3
324
8470
113
H3
163
200
595
682
586
673
103
520
641
143
525
646
693
814
600
8445
9940
10010
18000
18200
18400
760
148
21600
22000
H2
H1
D2
D1
20
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103
BLOCKS REPLACEMENT
Blocks must be ordered separately from the
filter. They are supplied in individual
packages, which are hermetically sealed in
suitable wrappings (type 4490), and in
special bags (type 4491) for safe storage
over long periods of time.
Every cartridge is equipped of two seals in
synthetic material to use like seal between
the two cartridges and between the
cartridge and its covers.
If the filter is installed in a system without
any by-pass, the block replacement has to
be done following these instructions:
6 The internal cleanliness of the body is
guaranteed by the cleaning effect of the
cup which is characteristic of Castel
filters.
if air is supposed to have entered the
plant during filter block replacement,
produce a vacuum in the low-pressure
side of the plant, and always in the sector
of the circuit involved.
7 Open the valve on the departure of liquid
line
8 Slowly open the suction valve of the
compressor and start the compressor
and its auxiliaries.
9 Top the charge up, if necessary.
1 Close the valve on the departing line.
2 Start the compressor and its auxiliaries in
order to transfer the refrigerant charge
into the high pressure side of the plant
(liquid receiver).
3 Stop the compressor at a suction
pressure sufficiently higher than the
atmospheric pressure.
4 Shutt off the service valve at the suction
side of the compressor.
NOTE: if during the transfer of the
refrigerant to the high-pressure side of
the plant, the discharge pressures reach
too high values (the condenser is flooded
due to insufficient capacity of the liquid
receiver), shut off the valve on the
compressor suction side and stop
immediately the compressor.
5 Replace quickly the filter block. During
the preparation of the new block, close
the filter with a clean cloth. The slight
over-pressure inside the filter and the
ability of the technician will prevent air
from getting into the plant.
D1
D2
4490
Catalogue
Number
Core Filtering
Surface
[cm2]
Nominal
Volume
Dimensions
[mm]
Weight
[g]
[cu.in]
[cm3]
D1
D2
48
800
47
96
140
TABLE 4: General Characteristics, Dimensions and Weights
4490/A
4490/B (1)
4490/AA
420
670
4490/AB (1)
4491/A
4491/AA
D1
630
100
1600
53
122
165
1350
4491
(1) Supplied without cover gasket as spare part
104
D2
www.castel.it
Approved by Underwriters Laboratories
Inc.
Except filters 4421/21C, /25C, /M80C, /33C
APPLICATIONS
The filters, shown in this chapter, are
classified Pressure vessels in the sense of
the Pressure Equipment Directive 97/23/EC,
Article 1, Section 2.1.1 and are subject of
Article 3, Section 1.1 of the same Directive.
They are designed for installation on
commercial refrigerating systems and on
civil and industrial conditioning plants,
which use refrigerant fluids proper to the
Group II (as defined in Article 9, Section 2.2
of Directive 97/23/EC and referred to in
Directive 67/548/EEC).
OPERATION
Good filtering of the refrigerant on the lowpressure side of the system is a guarantee
of protection for the compressor. System
cleanliness is ensured by micro filtering
cores, which filter out impurities derived
from manufacture and assembly of the
refrigerating system.
CONSTRUCTION
SUCTION LINE
SELECTION CRITERION
With clean systems, refrigerant flow
capacity and pressure drops of table 2 are
reported to a gas speed of 20 m/s for pipes
adequate to the filter connections.
For refrigerant flow capacities different from
the table values, under the other same
conditions, gas speeds and relative
pressure drops through the filter can be
gained for simple proportionality.
EXAMPLE
DEHYDRATORS AND FILTERS
MECHANICAL FILTERS WITH REPLACEABLE FILTERING
BLOCK
System data:
Refrigerant: R407C
Refrigerant flow capacity: 130 [kW]
Evaporating temperature: + 5 [C]
Suction pipe: 2.1/8
Filter: 4411/17C
In table 2, corresponding to filter type
4411/17C refrigerant and evaporating
temperature, the following data is given:
refrigerant flow capacity = 141,7 [kW];
pressure drop = 0,21 [bar].
The gas speed in the suction line will be:
The filters type 4410 are manufactured in
steel, with the exception of the connections
which are made of EN 12735-1 Cu-DHP
copper tube.
The filters type 4420 are completely
manufactured in steel and solder
connection, are machined with a steel bar
EN 10025 S355JR.
Zinc plated wire cloths and a filtering
baffle form the block, which features
a large surface, with controlled porosity.
The block can stop solid particles up
to 20 micron. At the two ends, soft
felt gaskets ensure perfect sealing
with the plastic cups. Filters are supplied
with an access fitting kit G9150/R05.
20
130 2
= 16,8 [m/s]
141,7 2
Pressure drop through the filter:
0, 21
130 2
= 0,177 [bar]
141,7 2
Remember that the dimensioning of the
suction line in a refrigerating system
requires great attention.
In fact the relative pressure loss,
included filter, which implies a reduction of
flow capacity sucked by the compressor,
influences directly the refrigerating capacity
of the plant.
This line is normally sized to have a total
pressure loss lower then a variation of the
saturation temperature of 1 C.
For example diagram 1, referred to R22,
allows to estimate the aforesaid variation in
function of pressure loss and evaporating
temperature.
www.castel.it
105
After all its always important to remember
that the refrigerant flow capacity of a
compressor, under the other same
conditions, can reduce considerably
because of the decrease of the saturation
temperature, consequent to the pressure
loss in the suction line.
To such purpose diagram 2 illustrates the
existing relation between saturation
temperature, in the suction line, and
variation of the refrigerant flow capacity of a
compressor.
TABLE 1: General Characteristics
Connections
Catalogue
Number
Core Cat.
Number
Number
of Cores
TS [C]
Core Filtering
Surface
[cm2]
ODS
[in.]
[mm]
4411/7C
7/8"
22
4411/9C
1.1/8"
4411/11C
1.3/8"
35
4411/13C
4495/C
820
4411/M42C
4411/17C
1.5/8"
42
54
2.5/8"
4421/21C
2.5/8"
76,1
4421/25C
3.1/8"
80
88,9
4.1/8"
114,3
4496/C
1850
(1) PS = 470 psig in compliance with the UL approval
3
2
inlet
outlet
Sketch of filter with
mechanical block
1 Block
2 Retainer cup
3 Spring
www.castel.it
min.
Risk
Category
according
to PED
max.
45 (1)
2.1/8"
4421/33C
106
[mm]
4411/21C
PS
[bar]
40
+80
32
-45
-40
-35
-30
ra
tu
re
-20
te
m
pe
-15
or
at
io
-10
-5
0
+10
ev
ap
Equivalent variation of the
saturation temperature
-25
2
1
DEHYDRATORS AND FILTERS
DIAGRAM 1
0
0
10
15
20
25
30
35
Pressure loss (kPa)
DIAGRAM 2
1,5
0,5
Correction factor of refrigerant flow capacity
0
-40
-35
-30
-25
-20
-15
-10
-5
10
Saturation temperature at the suction (C)
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107
TABLE 2: Refrigerant Flow Capacity and Pressure Drop
Evaporating Temperature [C]
Catalogue
Number
4411/7C
4411/9C
4411/11C
4411/13C
4411/M42C
4411/17C
4411/21C
4421/21C
4421/25C
4421/33C
+5
Refrigerant
-10
[kW]
[bar]
[kW]
[bar]
R134a
17,0
0,084
13,7
R22
26,0
0,120
21,5
R404A
23,7
0,150
R407C
22,2
R410A
38,4
R134a
-20
[kW]
[bar]
0,070
9,0
0,100
15,6
20,0
0,130
0,100
19,0
0,230
31,7
28,7
0,091
R22
43,0
R404A
-30
[kW]
[bar]
[kW]
[bar]
0,048
6,0
0,033
3,5
0,021
0,074
10,8
0,052
7,2
0,037
14,0
0,090
9,0
0,060
6,0
0,040
0,090
12,8
0,060
8,4
0,043
5,1
0,028
0,200
23,0
0,140
16,0
0,100
10,6
0,100
23,0
0,074
15,0
0,051
10,0
0,035
6,0
0,022
0,130
36,4
0,110
26,0
0,080
18,0
0,056
12,0
0,040
40,0
0,160
34,0
0,140
24,0
0,100
15,0
0,070
10,0
0,050
R407C
37,6
0,110
32,1
0,100
21,3
0,066
14,2
0,047
8,7
0,031
R410A
63,5
0,250
53,7
0,210
38,0
0,150
26,0
0,110
17,7
0,110
R134a
43,5
0,092
35,0
0,075
23,0
0,052
15,0
0,036
9,0
0,023
R22
65,0
0,130
55,0
0,110
39,0
0,080
27,0
0,056
18,0
0,040
R404A
60,7
0,160
51,4
0,140
36,2
0,100
22,7
0,070
14,5
0,050
R407C
57,0
0,110
48,6
0,100
33,2
0,068
21,9
0,047
13,4
0,031
R410A
96,0
0,250
81,0
0,210
57,0
0,150
40,0
0,110
26,0
0,110
R134a
62,0
0,110
50,0
0,090
33,0
0,062
21,4
0,043
13,0
0,027
R22
93,0
0,150
79,0
0,130
56,0
0,090
39,0
0,064
26,0
0,046
R404A
86,8
0,200
73,5
0,170
51,7
0,120
32,4
0,080
20,7
0,060
R407C
81,4
0,136
69,5
0,120
47,5
0,080
31,3
0,056
19,2
0,037
R410A
137,0
0,300
116,0
0,250
82,0
0,180
57,0
0,120
38,0
0,100
R134a
108,3
0,170
87,0
0,140
57,2
0,100
37,3
0,070
22,4
0,040
R22
162,0
0,230
137,0
0,190
97,0
0,150
66,4
0,100
44,0
0,070
R404A
151,3
0,310
128,0
0,270
90,0
0,190
56,5
0,130
36,0
0,100
R407C
141,7
0,210
121,1
0,180
82,6
0,125
54,4
0,087
33,4
0,057
R410A
239,0
0,440
202,0
0,370
143,0
0,290
98,0
0,250
65,0
0,200
R134a
167,0
0,300
133,5
0,250
87,5
0,180
57,0
0,120
34,3
0,070
R22
249,0
0,420
211,0
0,360
149,0
0,270
102,0
0,180
68,0
0,120
R404A
232,7
0,550
197,0
0,480
138,6
0,330
87,0
0,230
55,5
0,170
R407C
218,0
0,380
186,4
0,330
127,0
0,210
83,7
0,150
51,4
0,100
R410A
368,0
0,810
311,0
0,700
220,0
0,520
150,0
0,350
100,0
0,240
R134a
167,0
0,120
133,5
0,100
87,5
0,070
57,0
0,050
34,3
0,030
R22
249,0
0,170
211,0
0,150
149,0
0,110
102,0
0,074
68,0
0,050
R404A
232,7
0,220
197,0
0,200
138,6
0,130
87,0
0,100
55,5
0,070
R407C
218,0
0,160
186,4
0,140
127,0
0,090
83,7
0,060
51,4
0,040
R410A
368,0
0,340
311,0
0,300
220,0
0,200
150,0
0,150
100,0
0,100
R134a
238,0
0,210
191,0
0,180
125,0
0,120
81,5
0,090
49,0
0,050
R22
356,0
0,300
302,0
0,260
213,0
0,190
146,0
0,130
97,0
0,090
R404A
332,0
0,390
281,0
0,340
198,0
0,220
124,0
0,170
79,3
0,120
R407C
312,0
0,270
266,0
0,230
182,0
0,150
119,7
0,100
73,5
0,070
R410A
526,0
0,600
446,0
0,500
315,0
0,370
215,0
0,250
143,0
0,200
R134a
416,0
0,630
334,0
0,540
218,0
0,360
142,0
0,270
85,0
0,150
R22
623,0
0,900
528,0
0,770
372,0
0,570
255,0
0,390
170,0
0,270
R404A
581,0
1,170
491,0
1,000
346,0
0,660
217,0
0,500
138,7
0,360
R407C
547,0
0,790
468,0
0,690
320,0
0,440
210,0
0,300
129,0
0,200
R410A
921,0
1,800
780,0
1,400
550,0
1,200
377,0
0,800
251,0
0,530
Refrigerant flow capacities and pressure drops are referred to the following working conditions:
Liquid temperature ahead expansion valve: + 35 C
Overheating of suction gas: 6 C
108
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DEHYDRATORS AND FILTERS
TABLE 3: Dimensions and Weights
Connections
Catalogue
Number
ODS
Dimensions
[mm]
Weight
[g]
[in.]
[mm]
4411/7C
7/8"
22
4411/9C
1.1/8"
4411/11C
1.3/8"
35
[mm]
D1
D2
149
H1
H2
H3
154
241
96
159
246
101
5435
171
258
113
5410
5585
185
P
5450
5375
4411/13C
1.5/8"
4411/M42C
42
4411/17C
2.1/8"
54
162
249
103
4411/21C
2.5/8"
186
273
128
6030
4421/21C
2.5/8"
76,1
187
308
143
12000
4421/25C
3.1/8"
80
88,9
4421/33C
4.1/8"
114,3
192
313
121
163
200
200
148
12200
12500
20
H3
D1
D2
D2
H1
H2
4495 - 4496
D1
TABLE 4: General Characteristics
Dimensions and Weights
Catalogue
Number
Filtering
Surface
Dimensions
[mm]
P
Weight
[g]
[sq.in]
[cm2]
D1
D2
4495/C
127
820
60
87
138
480
4496/C
287
1850
80
113
168
750
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109
STRAINERS
APPLICATIONS
CONSTRUCTION
The filter is completely manufactured in
steel, either with nickel-plated Flare
threaded connections. The product range
also includes types with copper plated
solder connections, offering the possibility
to solder the copper pipe inside the
connections (ODS) or outside the
connections, using a copper sleeve (ODM).
Inside the filters there is a screen basket,
with wide filtering surface, made of
austenitic stainless steel AISI 304.
These filters may not be cleaned.
The filters, shown in this chapter, are
classified Pressure vessels in the sense of
the Pressure Equipment Directive 97/23/EC,
Article 1, Section 2.1.1 and are subject of
Article 3, Section 1.1 of the same Directive.
They are designed for installation on
commercial refrigerating systems and on
civil and industrial conditioning plants,
which use refrigerant fluids proper to the
Group II (as defined in Article 9, Section 2.2
of Directive 97/23/EC and referred to in
Directive 67/548/EEC).
TABLE 1: General Characteristics
Connections
Catalogue
Number
Filtering
Surface
[cm2]
Useful
Passage
Surface
[%]
Mesh
Opening
[mm]
TS [C]
ODS
SAE
Flare
4510/3
58
3/8"
4510/4
142
Kv
Factor
[m3/h]
ODM
[in.]
[mm]
[in.]
[mm]
2,4
3,2
1/2"
4520/3
3/8"
1/2"
4520/M10
10
12
12
14
1/2"
5/8"
16
5/8"
16
3/4"
18
22
4520/M12
58
36,6
0,166
4520/4
4520/5
4520/M18
142
min.
max.
40
+80
PS
[bar]
Risk
Category
according
to PED
42
Art. 3.3
2,4
3,4
8,0
TABLE 2: Dimensions and Weights
Dimensions
[mm]
4510/3
52
110
195
4510/4
76
174
515
109
195
113
205
4520/4
122
215
4520/5
126
245
170
495
4520/3
4520/M10
4520/M12
4520/M18
52
76
Weight
[g]
Catalogue
Number
D
D
4510
4520
DESSICCANTS
For using on refrigerating systems, Castel
puts the following desiccants at disposal of
its own customers:
Activated alumina
Code No 4901/AA
Molecular sieve
Code No 4901/MS
Silicagel
Code No 4901/SG
110
hermetically sealed in steel cans with a
weight of about 0,750 kg and supplied in
multiply package of 15 cans.
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