Page 2 - D30003

2 Parker Hannifin Corporation
Instrumentation Products Division
Huntsville, AL USA
http://www.parker.com/ipdus
Introduction
Parker CPI™/A-LOK® InstrumentationTube Fittings are designed
as leak-free connections for process, power and instrumentation
applications. These single and two ferrule fittings are manufac-
tured to the highest quality standards and are available in a
broad range of sizes, materials and configurations.
Features
The Parker CPI™/A-LOK® tube fitting has been specifically
designed for use on instrumentation, process and control
systems, analysers and environmental equipment employed
in chemical, petroleum, power generating and pulp and paper
plants. The CPI™/A-LOK® tube fitting has also found exten-
sive application in other fields where a high quality tube fitting
is required.
Materials
Parker CPI™/A-LOK® fittings are available as standard in
Heat Code Traceable, 316 stainless steel. Other standard
materials include steel, brass, aluminum, nickel-copper,
Hastelloy C®, Alloy 600, Titanium, 6Mo, Incoloy 625 and 825.
Straight fittings are machined from cold finished bar stock
and shaped bodies are machined from close grain forgings.
The raw materials used fully conform to the chemical require-
ments listed in Specification Table 1. For nuclear and other
critical applications, stainless steel CPI™/A-LOK® fittings are
readily available with documented heat code traceability.
Pipe Fittings/Adapters
Parker CPI™/A-LOK® tube fittings are available in a wide
variety of ISO and ANSI pipe thread configurations. For a full
line of these fittings, see Catalog 4260.
Tubing
Parker CPI™/A-LOK® tube fittings can be used with a wide
variety of tubing materials and a broad range of tube wall
thicknesses. CPI™/A-LOK® seals equally well on both thin wall
and heavy wall tubing. Tubing and fitting materials should
be selected to be compatible with the fluid media. Due to
thermal expansion characteristics and chemical stability,
the tubing should be of the same material as the fitting.
(The exception is brass fittings and copper tubing.)
Torque
Parker CPI™/A-LOK® tube fittings do not twist the tubing dur-
ing installation. CPI™/A-LOK® ferrule designs assure that all
make and remake motion is transmitted axially to the tubing.
Since no radial movement of the tubing occurs, the tubing is
not stressed. The mechanical integrity of the tubing is main-
tained.
No Distortion
In make-up, there is no undue force in an outward direction
to distort the fitting body or ferrules to cause interference
between the ferrules and nut. This assures that the nut will
back-off freely for disassembly and permits a greater number
of easy remakes.
Sealing
Positive, reliable connections with Parker CPI™/A-LOK®
fittings have been qualified by exhaustive tests and over four
decades of experience in the manufacture of quality tube fittings.
Nomenclature
Parker CPI™/A-LOK® fittings part numbers are constructed
from symbols that identify the size and style of the fitting and
material used.
Assembly, Remake, Gaugeability
Proper assembly is the key component to a leak-free
system. CPI™/A-LOK® tube fitting assembly, remake and
gaugeability instructions are found on page 74 of this
catalog.
Pressure Rating & Tubing Selection
For working pressures of CPI™/A-LOK® tube connections,
please see the Instrument Tubing Selection Guide (4200-
TS), found in the Technical Section of your Parker
Instrumentation Products Process Binder, or the Parker
Instrument Tube Fitting Installation Manual (Bulletin
4200-B4) at the end of this catalog.
In some cases where a male or female pipe thread is the
second end of a Parker CPI™/A-LOK® fitting, such threads
may be the pressure limiting factor of the tubing system.
Pressure ratings for Pipe Ends are shown on page 78.
Huntsville, Alabama, USA Barnstaple, UK
D30003 2 5/12/05