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Equipment Used Afloat, Ashore Pressure Seated Valve--Scarphing Machine--New Type Pump HE Cleveland Pneumatic Tool Co., | Cleveland, has developed an air valve for use in air service con- taining new features of interest to users of compressed air. The sectional drawing illustrates the valve, which is designed to eliminate air losses through leakage in transmission. In view of the action of compressed air - upon valve seats, packing and gaskets, the company's engineers determined to design a valve in which the air could not come in contact with the seat, thus avoiding replacement of seats and also utilizing air pressure as a seating agent to hold the valve plug on its seat. This would elim- inate packing, gaskets, stems and springs and reduce the valve parts to three--body, plug and handle. This was accomplished by using a hol- low taper plug with the large end upper- most. The air enters at the top and passes through and out of an opening in one side of the hollow plug into the supply chamber which connects directly with the air hose. The air does not come in contact at any time with the valve seat, which is the outer wall of the plug as indicated by the letter C on the drawing. The long arrow shows the IMPROVED PLATE SCARPHING MACHINE direction of the air in its travel through the wide, unobstructed air passage of the valve. The short arrow indicates the point on the large end of the plug where the air pressure is constant, forcing the taper plug against the walls of the valve Air Pressure always on the large end of Ground Joint or "Seat"' the full length of the Taper Plug Tgp Bee . Te os Oe Ge iB As ' the Taper Plug, holding fe it firmly on 2. Seat A, HOLLOW \C, PLUG ©, MM a V5, ® -- GZ = Valve may be shut off by turning Handle Y either way around) When shut, the Air- port "A" registers with Supply Chamber allowing air trapped in hose to escape to atmosphere << aay 6 g ; NEW TYPE VALVE SEATED BY AIR PRESSURE 294 body, forming a seat the full length. The valve has been subjected to severe waste arrangement to allow the accumu- lated pressure in the air hose to escape to atmosphere when the valve is shut off. This arrangement, shown by air ports A and B on the drawing, safeguards the operator, who, when disconnecting the hose from the valve, often receives a gust of air in his face and accidently gets scale or grit in his eyes. -- The valve has been subjected to severe service tests under both high and lowair pressures, the high pressure being 500 pounds, as well as submerged water tests, and test on liquids under pressure and on acetylene gas lines. Develops New Scarpher A machine designed especially for scarphing or beveling edges of ship boiler and tank plates has been developed by Alfred Herbert, Ltd, Coventry, Eng- land, with branch offices in New York. The machine can be operated in a fixed or portable position for such milling. The base of the machine is arranged to form a bed 47x64 inches and has T-slots for holding the work. On the base is mounted a back 31 inches high with two faces, both machined and arranged so the slide may be revolved. Provision is made for bolting the main slide rest carrying the milling head. The slide rest may be bolted to either the back or the front of the machine. On the fitted a heavy cross slide longitudinal main slide is which has a