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Filtrdehydr. 4412/M42A, 42 MM
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Filtrdehydrátor 4412/M42A, připojení 42 MM, pájecí, objem 1600 CM³
The filters in series 44 illustrated in this chapter are
designed for installation on commercial refrigeration
systems and on civil and industrial air conditioning plants
that use the following refrigerant fluids:
• HCFC (R22)
• HFC (R134a, R404A, R407C, R410A, R507)
• HFO and HFO/HFC mixtures (R1234ze, R448A, R449A,
R450A, and R452A)
belonging to Group 2, as defined in Article 13, Chapter 1,
Point (b) of Directive 2014/68/EU, with reference to EC
Regulation No. 1272/2008.
For specific applications with refrigerant fluids not listed
above, please contact Castel Technical Department.
In the case of filters with more than one cartridge, the fluid
passage takes place in parallel. As a result, the pressure
drop does not increase in proportion with the number of
cartridges. A large ring area between the cartridge and
the inner surface of the filter allows for the accumulation
of solid particles and prevents clogging. Before leaving the
filter, the refrigerant fluid must pass through the mesh sieve
in which cartridges are mounted. This eliminates the danger
that small particles of drying material be dragged into
circulation. Furthermore, at the 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 cartridge change.
Filters in series 4410: this are built with an aluminium
cover, zinc plated screws, and the steel body is equipped
with brazing connections:
• made from copper pipe EN 12735-1 – Cu-DHP. (No suffix
after the connection code)
• Machined from a steel bar EN 10025 S355JR. (“F” suffix
after connection code)
They are sold in the following two configurations:
• Codes with an “A” suffix, equipped with 1/4” NPT threaded
cover for mounting an access fitting with valve core (for
• Codes with a “B” suffix, equipped with blind cover
Filters in series 4420: these filters are manufactured with:
zinc plated steel cover, stainless steel screws, steel body
equipped with brazing connections machined from steel bar
EN 10025 S355JR.
Sold only in the configuration of codes with an “A” suffix,
equipped with 1/4” NPT threaded cover for mounting an
access fitting with valve core (for example kit G9150/R05)
Cartridges in series 4490, type A and type B, and
4491: are made from moulding a dehydrating filler, made
completely from 3 Å molecular sieves, with a suitable
binder. The choice of using only 3 Å molecular sieves as
the dehydrating material grants the cartridge extraordinary
moisture adsorption capacity while maintaining reasonable
Cartridges in series 4490, type AA and type AB, and
4491, type AA: are made from moulding a dehydrating filler,
made from 80% 3 Å molecular sieves and 20% activated
alumina, with a suitable binder. The use of a blend of
molecular sieves – activated alumina, grant the cartridges
a very high deacidifying capacity maintaining very good
moisture adsorption characteristics.
The presence of a controlled and defined percentage
of activated alumina, lower than the maximum value
recommended by ASERCOM, maintains the original
concentration of additives in the polyester oil.
The cartridges in series 4490 have volume of 48 cubic
inches, equivalent to about 800 cm3, and are suitable for
being used with filters in series 4411, 4412, 4413 and 4414.
The cartridges in series 4491 have volume of 96 cubic
inches, equivalent to about 1600 cm3 , and are suitable for
being used with filters in series 4421, 4423, and 4424.
Both have a hollow cylinder shape and are of the same size
as the corresponding products of the main international
brands. Consequently they are interchangeable. The hollow
cylinder shape provides a large surface area to the fluid
which to cross it in a radial direction. As a result, drying is
highly efficient with a minimum loss of charge.