21 JamesburyValve Solutions Steam Service Butterfly Valves Wafer-Sphere butterfly valves are well-suited for a wide variety of on-off saturated steam applications up to 450 psi. Bulletin: W150-1 High-Cycle Butterfly Valves Testing indicates that a combination of components — includingXtreme seats, filled super PTFE shaft seals, metal-backed/fabric-lined shaft bearings, PEEK-filled PTFE thrust bearings, and excluder rings – will yield significantly longer life than standard configuration valves. Chlorine Service Wafer-Sphere valves are available specially prepared for chlorine service. Bulletin: W150-2 Oxygen Service Butterfly Valves A complete line of valves is available for oxygen applications, ranging from air separation to basic oxygen steel furnace systems. To ensure these valves are compatible with oxygen, rigid material cleaning, handling, assembly and packaging procedures are carefully followed. Bulletin: W150-3 Vacuum Service Butterfly Valves The standardWafer-Sphere valve is capable of vacuum service of 2x10-2 Torr. For high-vacuum service, its specially cleaned seat and packing assure a leakage rate of no more than 1x10-5 standard cc/sec. of helium rated below 10x10-2 Torr. When required, valves can be certified with a helium mass spectrometer. Bulletin: W150-4 Jacketed Butterfly Valves Wafer-Sphere high-performance butterfly valves are available with welded or bolt-on jackets. Bulletin: W151-3 Special Service Butterfly Valves
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