. Science of railways . Hancock Vertical Checlc Valve with Stop Valve—Screw Connections In the combined stop and check types, by closing the stopvalve the checks may be easily removed while the engine isunder steam or a leaking check may be temporarily closedoff while on the road. The Hancock main steam valves have exceptionally fullsectional areas in the bodies. They have solid or unionshanks of flanges, threaded or brazing nipples for the outletsand are made in angle, straightway or 60-degree patterns. LOCOMOTIVE APPLIANCES. 297.

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