HHE 2022-2023

107 Two MATERIAL OPTIONS The type of media flowing through a connection can affect the strength, surface appearance, colour, and performance of the connection. Some guidelines for the different types of material: THERMOPLASTICS Acetal Strong, lightweight and economical and is used for a wide variety of chemical and mechanical components. Acetal offers high strength and rigidity over a broad temperature range, low wear, toughness and resistance to repeated use. ABS Economical medical grade thermoplastic that withstands gamma and e-beam sterilisation. It is commonly used in medical devices. ABS is an amorphous material with good physical properties and high resistance to chemical attack. Polyamide (Nylon) Very resistant to wear and abrasion, good mechanical properties even at elevated temperatures, low permeability to gases and good chemical resistance. Polysulfone Rigid material with excellent strength, good chemical resistance, withstands repeated sterilisation, and higher temperatures than other thermoplastics. High hydrolytic stability allows its use in medical applications requiring autoclave and steam sterilisation. Polycarbonate Resistant to some chemicals, withstands sterilisation and is transparent. It is commonly used in medical devices and offers impact resistance, outstanding dimensional stability and good optical properties. Polypropylene Excellent general purpose resin that is highly resistant to chemical attack from solvents and chemicals in harsh environments. In general, polypropylene is resistant to environmental stress cracking, and it can be exposed to challenging environments. Polyethylene Low cost, chemically resistant thermoplastic. It is opaque and can withstand reasonably high temperature. Polyethylene, unlike polypropylene, cannot withstand normally required autoclaving conditions. PEEK (Polyetheretherketon) Highly temperature resistant, engineered thermoplastic with excellent chemical and fatigue resistance. It exhibits superior mechanical and electrical properties. PPS (Polyethylene Sulfide) Broadest resistance to chemicals for its market as an advanced engineering plastic. (PEEK and PTFE have better resistance, but are not considered engineering resins.) FLUOROPOLYMERS PVDF Tough engineering thermoplastic with a balance of physical and chemical properties that qualify it for high performance in a wide range of applications. It is mechanically strong and tough, has good ductility, and has a broad, useful temperature range. PTFE Chemically resistant to all chemicals and solvents with the exception of some molten metals, molten sodium hydroxide, elemental fluorine, and certain fluorinating agents. PTFE offers chemical resistance and stability at high temperature. ALLOYS Chrome plated brass Rugged metallic material with an attractive appearance, chrome plated brass is excellent for higher pressure and temperature. Die-cast zinc Durable and lightweight (about 20% less than comparable brass) material that withstands high pressure and temperature. Aluminium Lightweight metal with an available hard anodised finish for durability. Aluminium is non-toxic, non-magnetic and non-sparking and is known for its high strength to weight ratio. O-RING SELECTION Buna-N A common material for o-rings with a temperature range of -4°C to 121°C (-30°F to 250°F). FKM Well known for its outstanding resistance to heat, oxidation, weathering, and ozone. The temperature range is -26°C to 204°C (-15°F to 400°F). EPDM Ethylene-propylene-diene rubber (EPDM, also sometimes referred to as EPR) is a chemically resistant family of compounds. Colder uses high quality peroxide cured EPDMs that provide exceptional resistance to temperatures with a wide range of chemicals. FFKM (Chemraz ® , Simriz ® , Kalrez ® ) Broadest range of chemical resistance of any elastomeric material, combining the resilience and sealing force of an elastomer with chemical resistance approaching that of PTFE. PFA & FEP Encapsulated seals combine the resiliency of the elastomer with the superior chemical resistance of the fluoropolymer to achieve a seal that is lower cost than a pure fluoroelastomer FFKM seal. Food-grade Commonly used when food, beverages or potable water is going through the coupling. Silicone Seals have good temperature resistance. The temperature range is -57°C to 204°C (-70°F to 400°F) with special compounds that can reach 79°C to 232°C (175°F to 450°F). Silicone can also be supplied with Class VI requirements for life sciences applications. INTERPRETATION OF TEST DATA WARNING: The compatibility data was assembled from 3 main sources: a) the Chemical Resistance Guides published by COMPASS PUBLICATIONS © , b) the Chemical Resistance guide published by VICTREX, the manufacturer of PEEK ™ and c) the Entegris Chemical Compatibility Chart. The table is to be used as a general guide only. Colder Products Company is not responsible for the accuracy of this data and assumes no obligation of liability in connection with its use. Therefore, CPC insists that all customers test and evaluate the suitability for use of CPC couplings in their particular application before using the couplings. NOTES: * PVDF may discolour after prolonged exposure in Potassium Hydroxide. * Polypropylene may discolour after prolonged exposure in Sulphuric Acid. Viton ® is a registered trademark of Dupont Dow Elastomers, PEEK ™ is a trademark of Victrex USA, Inc, Halar ® is a registered trademark of Ausimont, Chemraz ® is a registered trademark of Green Tweed.