I worked for a company that built INDUSTRIAL sized ice cream manufacturing freezers, used ammonia gas as a refridgerant. Our smallest freezer made right at 100 gallons of finished ice cream an hour, 400 liters, biggest made over 400 gallons an hour, and we built every size in 1, 2, and 3 barrel versions, so biggest model made 1200 gallons an hour if you had enough refridgeration compressor. I forget which brand exactly we used of Teflon pipe thread sealant, If our supplier ran out of the specific brand I had to call around to find that specific brand. The ammonia would dry the thread sealant out to a powder and it would leak. People don't like ammonia gas leaks in their factories.
For ANY kind of stamped paper or composite gasket I use HYLOMAR UNIVERSAL BLUE gasket sealant. It beats every kind of Permatex Aviation Form-a-gasket, or any other brand. It works on cork gaskets too but I absolutely HATE cork gaskets.
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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