I want to suspend a removeable cooling turn into a tank to cool a liquid,can anyone say where you can buy plastic tubing with coupling fittings,for a low pressure gas desire R134a?
What kind of fittings are you looking at? Swageloks are good on plastic tubing up well past 100 psi and you can usually alter them to most other couplings by adapters. You might also be at ColeParmer depending on pressure.
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And if you want to use Swagelok fittings on your evaporator anyway why not just fit automotive a/c hoses? Sometimes a readily available commercial product is the beat solution. You can use all the measure you save worrying about tubing leaks to design a really good heat exchanger.
Personally. I'd opt for a turn of coat or stainless tubing. Heat transfer will be exceed and if the materials are compatible with your liquid they will have a longer life. I'm not sure what your ambient condidtions are but bequeath when the compresser is not running the evaporator pressure is going to rise. Look up the saturated pressure at your highest ambient temperature and alter sure your tubing can handle that. Also act in mind that it is easier to seal water than refrigerant when you choose fittings.
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