Below are the questions asked during the presentation, along with their respective answers.
Q: What are the costs of thermoplastic quick disconnects?
A: Thermoplastic quick disconnects (QDs) cost approximately 20% to 30% less than their metal counterparts. Combined with the lightweight, chemical compatibility and flame retardant characteristics of the CPC thermoplastics, these QDs are the ideal solution for HPC, data center and aerospace applications, among others.
Q: What is the expected life span of these QD’s?
A: From a material life standpoint, thermo-oxidative stability limits can be useful to assess the acceptable long-term use temperature of polymers. Relative thermal index (UL RTI) determines the temperature to which a material can be exposed for 100,000 hours while retaining 50% of its original properties; PPSU for example has an RTI around 160°C for electrical and mechanical properties. Knowing common HPC applications run at 80°C, material degradation should not be a concern under normal operating conditions and environments for decades.
From an operational life standpoint, comprehensive validation testing is important in confirming reliability overtime. Arrhenius-type accelerated aging using aggravated conditions of heat and pressure for example can help project long-term effects of operating conditions. Other validation testing to consider is mechanical cycle life, cyclic pressure impulse, burst pressure and fluid flow testing.
Q: How does 8,000 psi tensile strength compare with brass and aluminum?
A: Ultimate tensile strength (UTS) is a good general indicator of relative mechanical strength, how much load a material section can hold in tension before breaking, but the key word there is relative. In practice when comparing and choosing materials, especially ductile materials, there are a multitude of mechanical, thermal, and electrical properties to consider, as well as operating conditions and environment.
When thinking about materials for quick disconnects in liquid cooling loops; typical metal alloys may include varieties of stainless with UTS beyond 60ksi, Aluminum 6061 ~20-45ksi based on temper, etc, brass will be even a bit higher based on the composition. Then there are polymers – both thermoplastics and elastomers – thermoplastics typically are in the 8-12ksi range, PPSU has a UTS around 10ksi, and elastomers are in the 1-3ksi range. EPDM for example is approximatley2ksi. A broad range of UTS is represented, but it all comes down to what you need the material to do and where will it be doing it. For liquid cooling quick-disconnects it is crucial to understand the material used and the environment, while also balancing performance without over engineering.
Q: You mentioned the 1/8 inch size – are there larger sizes available?
A: Currently, only the PLQ2, 1/8” size is available. However, larger sizes will be available in 2019.
Q: Can the metal connectors and the plastics be used together? I.e. can a plastic insert be used with a metal body?
A: Yes, the CPC thermoplastic and metal couplers are fully interoperable.
Q: Are there any special instructions or considerations involving installation?
A: Consider materials of quick-disconnect, as well as compatibility with fluid media and mating hose or porting. For threaded connections, additional consideration should be given to installation torque, whether lubricating thread sealant, fluid or tape is used.
Q: Are samples available?
A: Samples are available beginning December 2018
Q: Can this connector be customized for different colors, terminations, etc.?
A: CPC is known for our ability to engineer products that meet specific and/or unique customer requirements. We would be pleased to discuss your customization needs, including colors and terminations.
For additional questions or requests please contact Kristin Anderson, CPC Global Market Manager direct, at +1.612.413.8900