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The u series is the most widely used version, supported by two ball bearings and available with graphite (for filtered air and water) or silicon carbide (for oil and water) seals. Available in one or two way versions and sizes ranging from 1/4” to 2” 1/2, with fixed or rotating siphon.
Graphite seals vs stainless steel is used for air and water filtered at 20 micron at least. For dirty water or hydraulic oil, silicon carbide seal vs silicon carbide is suggested. Stainless steel spring, screened bearings, nickel plated versions.
The standard supply provides the rotating nipple threaded BSP UNI 338/66 (cylindrical) right or left.
