Brochure

24
Technical Specifications
Working Pressure and Temperature
Range for Acetal Fittings (PI, SI, SM
and PM).
Super Speedfit
®
fittings are suitable for the following
pressures and temperatures.
Temp. Pressure
5/32” - 5/16” 3/8” -1/2”
4mm - 8mm 10mm - 22mm
Air
- 4˚F 230 psi 150 psi
- 20˚C (16 Bar) (10 Bar)
Potable Liquids and Air
+33˚F 230 psi 150 psi
+1˚C (16 Bar) (10 Bar)
+68˚F 230 psi 150 psi
+20˚C (16 Bar) (10 Bar)
+150˚F 150 psi 100 psi
+65˚C (10 Bar) (7 Bar)
Also suitable for vacuum
For Polypropylene Working Pressure and Temperature
Range, please refer to page 5.
Depending on the tube used, under certain conditions
fittings may be used at higher pressures and
temperatures. Please refer to our Technical Support
Department for guidance. Note 1 Bar = 14.5 PSIG.
Tube Types
Plastic Tube - Polyethylene, nylon and polyurethane
conforming to the tolerances shown below. For soft
tubing or thin wall tube we recommend the use of tube
inserts.
Braided Tube - Use of Tube to Hose Stems listed on
page 9 is essential when using braided tube or hose.
The use of clamps to retain braided tube on barbs is
recommended.
Metal Tube (soft) - Brass, copper or mild steel
conforming to the tolerances below.
Metal Tube (hard) - We do not recommend Super
Speedfit fittings for hard metal or chrome plated tubes.
For stainless steel and other polished metal tubes we
recommend the use of Superseal fittings. These are
shown on page 12 of this catalog.
It is essential that outside diameters be free from
score marks and that the tube be deburred before
inserting the fitting.
Tube Tolerances
Super Speedfit
®
fittings are offered for tubes with
outside diameters to the following tolerances.
Size (inches) 5/32 - 3/16 1/4 - 1/2
Tolerance
(inches)
+0.001 / -0.003 +0.001 / -0.004
Size (mm) 4mm - 5mm 6mm - 22mm
Tolerance (mm) +0.05 / -0.07 +0.05 / -0.10
Installation and System Testing
Fittings and tube should be kept clean and
undamaged before use.
All tube and fittings installations must be pressure
tested after installation to ensure system integrity before
handing over to the final user. Refer to “How to make a
connection”.
Chemicals
For use with chemicals or other potentially aggressive
liquids, please contact our Technical Support Department.
Super Speedfit fittings are not recommended for use
with explosive gases, petroleum spirits, and other fuels
or for central heating systems.
Collet Covers
Are available as additional security against removal of
the tube or to provide a simple means of color coding.
The cover is offered in a range of six colors. Please see
page 23 of this catalog.
Food Quality
All the fittings in this catalog are produced in Food and
Drug Administration (FDA) approved materials and are
therefore recommended for food quality applications.
The wetted surfaces of John Guest PI, PM, SI, CI, PP and
NC plastic fittings, PPSV and ASV Valves, and PE Tubing
are in compliance with FDA requirements for direct
contact with food as detailed in 21CFR part 177.2470
for the body and 177.2600 for the O-ring.
NSF International Standard 51 and 61.
Maximum Torque Values for Plastic
Threads BSP, BSPT & NPT.
Do not overtighten plastic threaded fittings as this could
cause undue stress and eventual failure. Maximum
recommended torque figures are shown below.
Threads
1/8” - 1/4” 3/8” - 1/2” 3/4”
Maximum
Torque
1.0ft lbs 2.2ft lbs 2.9ft lbs
1.5Nm 3.0Nm 4.0Nm
John Guest recommends that OEM customers consider
replacing threaded ports with the more modern Cartridge
Systems.
It is recommended that all installations are checked prior
to use to determine that a seal has been made.
The maximum torque figures quoted for use with
Speedfit fittings are dependent on the mating thread
conforming to the relevent U.S., British or International
thread standard.
Maintenance and Replacement
Intervals
John Guest products generally require little maintenance
but as a minimum we recommend routine visual
inspection. Frequency of visual inspection will depend
on severity of application and risk of failure. If after
visual inspection John Guest products appear damaged,
cracked, charred, discolored, heat distorted or corroded,
they should be replaced. Any product that is or appears
to be leaking should be replaced.
Product life is affected by the severity of the application,
the hostility of the working environment and contact with
aggressive chemicals or liquids. It is therefore important
that specific replacement intervals be considered by
specifiers/users/customers based on previous service life
or when failure could result in unacceptable downtime,
damage or injury risk.
Cleaners and Sanitizing of Fittings
Our advice to customers is to use cleaners and sanitizing
agents that are above pH4 and low in hypochlorite
level. Acetal fittings and parts that are cleaned and/or
sanitized should be rinsed immediately with copious
amounts of clean, neutral tap water to remove all traces
of the cleaners. Details of which products are made from
acetal are shown in our catalog but generally John Guest
products incorporating acetal are designated by the part
number prefix PI, PM, CI, CM and RM. Polypropylene
fittings offer greater resistance to aggressive chemicals
than acetal fittings. Polypropylene does not have the
same mechanical properties as acetal and John Guest
polypropylene fittings are generally designated by the
part number prefix PP, PPSV and PPASV.
Our material suppliers recommend ECOLAB Oasis 133
as a suitable external cleaner for products manufactured
by John Guest.
Responsibility of Use
While we give a warranty against defects in manufacture
or materials, it is the responsibility of the user/installer
to ensure that fittings and related products are suitable
for their application. The installation must be carried
out correctly in accordance with our recommendations,
complying with recognized codes of practice and
relevant national standards, and be properly maintained.
Please refer to our terms and conditions of sale.
Side Load
Fittings should not be subject to excessive side loads
and they should not be used as support brackets. Tubing
and fittings should be adequately supported to prevent
excessive side loading.
Product Selection and Installation
John Guest fittings and related products are specifically
designed and manufactured by John Guest to the
Technical Specifications set out in the John Guest Product
Catalog. All John Guest fittings and related products
should be selected, installed, used and maintained
in accordance with these Technical Specifications. It
is the customer’s/user’s responsibility to ensure that
John Guest fittings and related products are suitable for
their intended applications, and are properly installed
and maintained and are used in accordance with the
Technical Specifications. It is also the customer’s/user’s
responsibility to provide its customers with any relevant
technical information about John Guest products it
supplies them.
The company has a policy of continuous research and
development and reserves the right to amend without
notice the specification and design of all products
illustrated in this catalog. John Guest reserves the right
to change the color and shape of products. Photographs
are for illustration purposes only.
Subject to our Terms and Conditions of Sale shown on
page 37-38.
John Guest USA, Inc. is not responsible for misprints or
typographical errors.