This, quote{Large commercial units use a sporlan valve which are pretty cool valves that have a needle valve inside the technician is able to make adjustments that control the flow of liquid being turned into a gas. The more freon available to turn into gas make it a cooler or walk in freezer.
On the bottom of the sporlan valve below you see a cap screw, you remove the cap screw to make the adjustments. The copper line attached to the top of the valve is what controls a bellow that works the needle valve. By turning the adjustment screw in your adding more pressure to the spring which in turn cuts down on the flow of freon if you want the box to be colder back the screw out thus allowing more freon to pass through the system.}
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This is exactly what I have been wanting to know for a while, but didn't know the question to ask......
I was wanting to make a cooler unit to use with a receiving flask on a laboratory distillation setup. The water chillers only get down to just under freezing, and a home freezer gets down to -14°C when running 100% of the time. They are too bulky to use.
I will check my water chiller to see if its got that valve on it tonight.
If it hasn't maybe I can get it changed, and maybe a different gas if that helps. Theres a small fridgeration firm near here that I can use to do it.
And... thanks again Alloy2.
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