Brochure

Working Pressure and Temperature
Range for PP Fittings.
Water Max. 150 psi at 70ºF
Max. 60 psi at 140ºF
Min. 33ºF/1ºC
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 14 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 our website. It is essential that outside
diameters be free from score marks and that
the tube be deburred before inserting the fitting.
Tube Tolerances
PP 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” on
our website at www.johnguest.com.
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
Refer to our website for range of collet covers.
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 PP, PPSV, 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.
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
1.0ft lbs 2ft lbs 3ft lbs
Torque
1.5Nm 3.0Nm 4.0Nm
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 relevant U.S.
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
The external surfaces of John Guest products
must not come into contact with oxidizing
or acidic cleaners and sanitizing agents, for
example (but not limited to) those below pH
4, high in sodium hypochlorite level (bleach)
or containing hydrogen peroxide. Our plastic
material suppliers recommend ECOLAB Oasis
133 as a suitable cleaner for the external
surfaces of products manufactured by John
Guest.
Several different methods exist for sanitizing
the internal surfaces of fluid systems, including
sodium hypochlorite, hydrogen peroxide,
chlorine dioxide or ozone. It is entirely the
responsibility of the end user to determine if
the chosen method is suitable for use with John
Guest products over the planned working life
of the system. However, to avoid unnecessary
early failure, John Guest requires that the
disinfection solution must be immediately
flushed out at all draw off points with fresh,
wholesome water at the end of the disinfection
period. The solution must not be left in the
system. Disinfection solutions must only come
into contact with the internal (fluid carrying)
surfaces of the system. If any other surfaces
of a fitting come into contact with disinfection
solution the whole fitting must be replaced
immediately. Polypropylene fittings offer greater
resistance to aggressive chemicals but does not
have the same mechanical properties as other
materials. John Guest polypropylene fittings are
generally designated by the part number prefix
PP or PPM.
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.
John Guest USA, Inc. is not responsible for
misprints or typographical errors.
TECHNICAL CHECKLIST FOR INCH SIZE QUICK CONNECT FITTINGS LISTED ON PAGES 13-16
Technical Specifications
18.