electromechanical
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Filter-Driers
Catalog A-1, January 2020
⚠WARNING – USER RESPONSIBILITY
Failure or improper selection or improper use of the products described herein or related items can cause death, personal injury and property damage.
This document and other information from Parker Hannin Corporation, its subsidiaries and authorized distributors provide product or system options for further investigation
by users having technical expertise.
The user, through its own analysis and testing, is solely responsible for making the nal selection of the system and components and assuring that all performance, endurance,
maintenance, safety and warning requirements of the application are met. The user must analyze all aspects of the application, follow applicable industry standards, and follow
the information concerning the product in the current product catalog and in any other materials provided from Parker or its subsidiaries or authorized distributors.
To the extent that Parker or its subsidiaries or authorized distributors provide component or system options based upon data or specications provided by the user, the user
is responsible for determining that such data and specications are suitable and sufcient for all applications and reasonably foreseeable uses of the components or systems.
OFFER OF SALE
The items described in this document are hereby offered for sale by Parker Hannin Corporation, its subsidiaries or its authorized distributors. This offer and its acceptance are
governed by the provisions stated in the detailed “Offer of Sale” elsewhere in this document or available at www.parker.com.
FOR USE ON REFRIGERATION and/or AIR CONDITIONING SYSTEMS ONLY
Catalog A-1, January 2020 supersedes Catalog A-1, February 2019 and all prior publications.
Catalog A-1, Filter-Driers / Page 1
Table of Contents
Filter-Driers
Liquid Line Filter-Driers
Introduction to Filter-Driers......................................................2
Copper Service Filter-Driers .....................................................3
Gold Label™ Liquid Line Filter-Drier (LLD Series) ...................................5
Sahara Series™ Liquid Line Filter-Driers (SS Series) ................................8
Terms of Sale With Warranty Limitations ............................................23
Page 2 / Catalog A-1, Filter-Driers
Introduction to Filter-Driers
The function of a lter-drier in a refrigeration system is to remove contaminants
that are harmful. If these contaminants
remain at elevated levels, they will
jeopardize the longevity of the system.
Contaminants that are frequently found
include moisture, acid, copper oxides,
metal chips, wax-like compounds and
others.
Selecting a lter-drier for a particular
application requires various technical
factors to be considered. These factors
include the type of system, connecting
line size, water capacity, ow capacity
(size of system), ltration capability,
acid capacity, material of construction
(steel vs. copper), and design pressures.
Evaluation of each factor is necessary
to ensure proper and economical lterdrier design.
Parker has developed lter-drier recommendations based on current technical
data, as well as many years of actual
eld experience. Products are tested
for ow and water capacity using the
American Society of Heating, Refrigeration and Air Conditioning Engineers
(ASHRAE) Standard 63.1 and are rated
for use based on the Air Conditioning,
Heating and Refrigeration Institute’s
guideline AHRI-710. Data obtained
from this testing is shown in the capacities tables for liquid line lter-driers and
can be used for comparison purposes.
However, other factors must be considered for various types of equipment.
Moisture Removal
The ability to remove moisture from a
refrigerant system is a primary function
of the lter-drier. Moisture can come
from many sources such as trapped
air from improper evacuation, system
leaks, and motor windings, to name a
few. Another source is due to improper
handling of polyolester (POE) and polyvinyl ether (PVE) lubricants, which are
hygroscopic; that is, they readily absorb
moisture. POEs and PVEs can pick up
more moisture from their surroundings and hold it much tighter than the
mineral oils which have been used for
many years. This moisture can cause
freeze-ups and corrosion of metallic
components. Moisture in the system can
hydrolyze the POE lubricant, forming
organic acids. These acids, if they exist
in signicant quantity, will react with
materials within the system and can adversely affect component operation. To
prevent the formation of these acids, the
moisture must be minimized. This is accomplished by the use of a lter-drier
that utilizes molecular sieve and activated alumina.
Molecular sieves are crystalline sodium
alumino-silicates (synthetic zeolites)
having cubic crystals which selectively
adsorb molecules based on molecular
size and polarity. The crystal structure
is honeycombed with regularly spaced
cavities or pores. Each of these cavities or pores are uniform in size. This
permits molecules, such as water, to be
adsorbed, while allowing other larger
molecules, such as the refrigerant, lubricant and acids to pass by. The surface of
the desiccant is charged positively with
cations, which act as a magnet and will
therefore adsorb polarized molecules,
such as water, and hold them tightly on
the structure.
Acid Removal
Refrigerants by themselves are very
stable, even when heated to a high temperature. However, certain conditions
do occur which can result in the formation of acids. The reaction of refrigerants with water may cause hydrolysis
and the formation of hydrochloric and
hydrouoric acids. These acids are usually present as a gas in the system and
are highly corrosive. In ordinary usage
this reaction is negligible, but in a very
wet system operating at abnormally
high temperature, some hydrolysis may
occur.
Another signicant source of acidity in refrigeration systems is organic
acid formed from lubricant breakdown.
As previously discussed, this can be
the by-product of the hydrolyzed lubricant. However, organic acids can
result from an oxidation reaction of the
lubricant (from air left in the system) or
if the thermal stability of the lubricant
is exceeded for a period of time from an
improper operating system.
Activated alumina is the desiccant of
choice if added acid capacity is desired
in the lter-drier. Many of the copper
spun lter-driers referenced in this catalog are made with a 100% molecular
sieve formulation and are not equipped
with activated alumina. This is often all
that is required for the type of system
where they are used, since they minimize the potential of hydrolysis reactions of the lubricant and/or refrigerant.
Copper lter-driers are designed with
a molecular sieve to achieve the maximum water capacity because they are
typically smaller than the steel counterpart and need this capacity. However,
copper spun lter-driers are available
with molecular sieve/activated alumina
formulations if desired.
For steel shell lter-driers, catalog products often utilize a molecular sieve/activated alumina formulation appropriate
with current system chemistries. These
products come standard with this desiccant blend because these products often
nd numerous applications in service
where the type and amount of contaminants are unknown. For these applications, lter-driers with a blend of
molecular sieve and activated alumina is
advantageous.
Filtration
Scale, solder particles, metallic nes
and all types of foreign substances must
be removed to protect the compressor,
solenoid valves, expansion valves, capillary tubes and other close tolerance
parts of a refrigeration system.
The solution to system ltration is the
use of a lter-drier. The lter-drier can
be constructed in two different formats
to perform this function. The lter-drier
can be a spring load desiccant design
that utilizes multiple layers of a brous
media that captures the circulating
Introduction to Filter-Driers
Catalog A-1, Filter-Driers / Page 3
particulate. The alternate design (always
used in large systems) is a molded core
made with a specic desiccant formulation. The desiccants are sized and
bonded in such a way that the useable
shape provides the ltration. The large
particles are caught on the surface of the
core and the smaller solids are captured
as the refrigerant channels through the
desiccant core.
Steel vs. Copper
The major differences in using steel vs.
copper lter-driers are the system sizes
and applications. Copper lter-driers are
normally used in 5 ton and smaller, less
complex applications, including systems
with less pressure uctuations and lower
vibration tendencies. Some smaller systems do not require high ltration capabilities; however, some of the smaller
systems using the new refrigerants
will require better ltration. In order to
meet these requirements, a molded core
construction and lter-driers with additional brous media and screen should
be considered. Also, copper is typically
the most economical option for smaller
systems. Because copper driers are used
for smaller applications, the refrigerant charge required will generally be
smaller than in the steel lter-drier.
Copper Service Filter-Driers
Parker’s copper service lter-driers
adsorb moisture and provide ltration to
systems in the eld. The features of the
copper service lter-driers are provided
below.
MMS-80
Working psi: 700
MMS-100
Working psi: 500
Information regarding operating pressure is required to adequately size the
wall thickness of the lter-drier to attain
the ultimate burst pressure, for both copper and steel. In accordance with Underwriters Laboratories (UL), the burst
pressure is rated as ve times the design
working pressure of the system, or three
times the design working pressure of the
system when evaluated using the fatigue
stress test outlined in UL 207. Typically,
for copper lter-driers, the design working pressure can be correlated to tube
diameter and wall thickness to meet
specic UL specications.
Applications
Air conditioning, heat pump, and small
refrigeration systems
Features and Benefits
Made in the USA
Worldwide OEM acceptance and usage
All copper construction for corrosion
resistance and simplified brazing
100% molecular sieve
Compatible with commercially available
refrigerants and lubricants
UL Recognized SMGT2/SMGT8-SA1756
MMS-200
Working psi: 700
712
Working psi: 500
319F
Working psi: 750
619/620
Working psi: 750
621
Working psi: 750
1638F (Formerly CO73S)
Working psi: 750
Note: For models 319F and 1638F, the “F” represents UL fatigue qualification, not flare fittings.