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Cryolab CV8 fromLeslie Controls Inc.is engineered for use in liquid hydrogen, helium, oxygen and nitrogen systems. The body and Kel-F seat configuration employ a sharp edge on a tapered seat. Double-bonnet seals and stem packing are used with Vitron and backed up with a Teflon seal to provide leak-tight performance. Bonnet is axially bolted to ensure complete compression of the Teflon seal and can be supplied for use in a horizontal position. Stem threads are made of stainless steel and mated to a brass bushing in the bonnet to eliminate galling. The valve is available in tube and pipe sizes from 0.5 to 4" and in globe, right-angle and Y pattern configurations. July/August 2000, RS# 215