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Technical Specification - Cartridge Systems May 2008 NOTE: This specification refers exclusively to cartridge systems prefixed PI, PM, CI, CM, MI and MM. Other fittings, valves, tube and ancillary products have their own Technical Specification.
Product Selection and Installation John Guest fittings and related products are specifically designed and manufactured by John Guest to the Technical Specification set out in the John Guest Product Catalogues. 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, 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 own customers with all relevant technical information about John Guest products it supplies them. If you have any questions about our technical specifications, please contact us. For use with chemicals or other potentially aggressive liquids, please refer to our Customer Services Department. Super Speedfit fittings and related products are not recommended for use with explosive gases, petroleum spirits, and other fuels or for central heating systems. 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, discoloured, 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. Working Temperatures and Pressures John Guest Cartridges and Half Cartridges are suitable for the following pressures and temperatures. Acetal Cartridges Those Plastic Cartridges which have the prefix PI,PM,CI,CM,PCI,PCM or ECI.
*Only cartridges with Nitrile rubber 'O' ring should be used for air, these can be identified by part numbers with prefix PI or PM. Polypropylene Cartridges Those Plastic Cartridges which have the prefix PP
The maximum operating temperatures and pressures are dependant on the housing material, wall thickness, vibration and pulsation, tube type and general operating conditions. Customers are advised to carry out appropriate testing to ensure cartridges are suitable for their applications. Housing Materials Tube Types Plastic Tube - Polyethylene, nylon and polyurethane conforming to the tolerances shown below. For soft or thin walled tube we recommend the use of tube inserts. Metal Tube (soft) - Brass, copper or mild steel conforming to the tolerances shown below. Metal Tube (hard) - We do not recommend our cartridges for hard metal tubes. It is essential that the outside diameter is free from score marks and that the tube be deburred before inserting the cartridge. Tube Tolerances
lnstallation and System Testing Products should be kept clean and undamaged before use. All installations must be pressure tested after installation to ensure system integrity before handing over the final user. See also "Making a connection". Cleaners and Sanitising of Acetal Fittings John Guest Full Cartridges and Half Cartridges incorporate acetal parts. Our advise to customers is to use cleaners and sanitising agents that are above pH4 and low in hypochlorite level. Acetal fittings and parts that are cleaned and/or sanitised should be rinsed immediately with copious amounts of clean tap water to remove all traces of the cleaners. Product Design John Guest has a policy of continuous research and development and reserves the right to amend without notice the specification and design of all products. Product descriptions and sizes are approximate and John Guest reserves the right to supply products which may have minor and negligible deviations from that printed in catalogues or displayed on this web site (or from products previously supplied). Warranty Whilst we give a warranty against defects in manufacture or materials, it is the responsibility of the specifier 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 recognised codes of practice and relevant national standards, and be properly maintained. Please refer to our terms and conditions of sale. Product Selection Due to the wide variety of operating conditions, appliction and uses of our products, it is the usre's / specifiers responsibility, through their own testing analysis, to ensure correct product selection for their applictions. Installers of John Guest Cartridges are fully responsible for the final assembly, testing, quality and apllication. Side Loads Connections should not be subject to excessive side loads or used as support brackets. Tubing and fittings should be adequately supported to prevent excessive side loading.
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